CN205598348U - A apparatus is kept somewhere to skin table for guiding puncture - Google Patents

Abstract

The utility model discloses an apparatus is kept somewhere to skin table for guiding puncture, it includes: remaining pipe personally experiences sth. Part of the body, its inside passageway that has length direction extension of the basic remaining pipe of the following body, the passageway is used for guiding the pjncture needle, the diameter of passageway slightly is greater than the external diameter of pjncture needle, the remaining pipe body has to be kept somewhere the near -end that lies in skin table top under the occupy -place state and is lieing in the distal end that the below was shown to the skin, the extension length of distal end is set up to be done the end of distal end is close to the vascular wall that is punctured and vascular wall that the contactless was punctured, the support has the bottom surface of showing directness or indirect contact with the skin bottom it, the support supports and is fixed the remaining pipe body, the sealing member, it is set up to right the passageway seals.

Description

A kind of epidermis indwelling apparatus for guided puncture

Technical field

This utility model relates to a kind of medical apparatus and instruments, particularly relates to the medical apparatus and instruments of a kind of indwelling epidermis.

Background technology

Nephrotic is it is generally required to carry out hemodialysis according to the frequency of weekly 2～3 times.Saturating at blood During analysis, needing to be built into dialysis needle or remaining needle to human body, this dialysis needle or remaining needle need via skin Skin intravasation, therefore can be that the patient accepting hemodialysis brings the biggest misery.

The dialysis needle used at present or remaining needle implantation mode mainly have region puncture method, rope ladder puncture method and Buttonhole puncturing method.

Wherein, region puncture method is a kind of method arbitrarily punctured in the range of available blood vessel.Region punctures The advantage of method is easy and simple to handle, relatively low to the skill set requirements of operator.The shortcoming of region puncture method is each Dialysis is required for creating new point of puncture, thus defines the damage of larger area at skin surface and blood vessel wall Wound, and then the risk of the complication such as hemangioma, angiostenosis, hematoma has been significantly greatly increased.It addition, skin The permanent scar wound on surface the most seriously reduces the quality of life of patient.

Rope ladder puncture method is a kind of side carrying out arrangement puncture in the range of available blood vessel according to rope ladder order Method.The advantage of rope ladder puncture method is to limit penetrating area, minimizing point of puncture quantity, thus to a certain extent Protect skin and blood vessel.The shortcoming of rope ladder puncture method is that the method can be limited by the blood vessel that can be used for puncturing Region, for the latter stage nephropathy patient that vascular conditions is the most bad, the method has significant limitation.

Buttonhole puncturing method is a kind of only to wear for a long time from two fixing points of puncture in the range of available blood vessel The method of thorn.The advantage of buttonhole puncturing method is can to protect skin and blood vessel greatly, reduces puncture and causes Complication, simultaneously carrying out puncture in the puncture tunnel puncturing and being formed long-term, repeated multiple times can alleviate Patient suffering, and can guarantee that the attractive in appearance of point of puncture.Based on this, buttonhole puncturing method has become as China's blood The piercing method recommended in the middle of liquid dialysis vascular access care guidelines.

But, under present case, buttonhole puncturing method is implemented difficulty due to it and is not the most widely adopted. This is because, the puncture tunnel in buttonhole puncturing method needs 6～12 continuous print punctures just can be formed, These 6～12 continuous print puncture simultaneously needs fixing, experienced operator to ensure when puncturing every time Entry point, needle angle are the most consistent with depth of needle.Therefore, buttonhole puncturing method is for the operation of operator Technical threshold has higher requirement.

Accordingly, it would be desirable to a kind of product of exploitation or method, it can reduce the enforcement difficulty of buttonhole puncturing method.

In prior art, for reducing the enforcement difficulty of buttonhole puncturing method and being adapted to assist in foundation puncture tunnel The product in road mainly has two classes:

One type is the manual interface implanted on blood vessel by operation, and this manual interface is every in order to ensure Secondary when puncturing on blood vessel the concordance of point of puncture and degree of accuracy.But this usual structure of manual interface is multiple Miscellaneous, implantation process is relatively big with the wound of blood vessel to the skin of patient, implanted manual interface also face with The risk that receptor is incompatible, thus cause anaphase and maintenance cost huge.

Another kind of product of the prior art is occupy-place tunnel nail.Terminate to extract dialysis at each dialysis treatment After pin, occupy-place tunnel nail is placed into and is retained in skin tunnel, until during dialysis treatment next time, entering Row further takes out before puncturing, thus ensures the gap at twice dialysis treatment, and puncturing tunnel wound will not be voluntarily Repair.Additionally, puncture tunnel inner wall can form smooth connective tissue along occupy-place tunnel nail, thus Accelerate the formation in tunnel.In the patent of Nipro Corp, " remaining needle insertion hole is formed this series products Plug and its installation tool " (Publication No. CN1671429A, publication date is JIUYUE in 2005 21) And the one-tenth vent needle of remaining needle " insert " (Publication No. CN1381279A, publication date is 2002 November 27) in be described and introduce.

But above-mentioned this product can only ensure to carry out occupy-place in the gap of hemodialysis to puncturing tunnel, by Being taken out from puncture tunnel in piercing process in it, therefore it can not be when puncturing to not becoming Ripe tunnel is protected, and can not guide piercing process, thus likely destroy original puncture The formation in tunnel, and then affect the treatment of patient.

Utility model content

The purpose of this utility model is to provide a kind of epidermis indwelling apparatus for guided puncture, this epidermis Indwelling apparatus can help to set up puncture tunnel, moreover, originally as product of the prior art The epidermis indwelling apparatus for guided puncture described in utility model can also be worn immature when puncturing Thorn tunnel is protected, and can also guide piercing process simultaneously, thus greatly reduce buttonhole and wear The enforcement difficulty of acupuncture manipulation, reduces the technology requirement to puncture procedure personnel, and then beneficially buttonhole puncturing Being widely popularized of method.

Based on above-mentioned utility model purpose, this utility model provides a kind of epidermis for guided puncture and stays Put apparatus, comprising:

Indwelling body, has the passage substantially extended along the length direction of indwelling body inside it, described logical Road is used for biopsy needle guide, and the diameter of described passage has slightly larger than the external diameter of puncture needle, described indwelling body There is the near-end being positioned under indwelling occupancy state above epidermis and be positioned at the far-end below epidermis, described far-end Development length be arranged to the end of described far-end and do not contact near the blood vessel wall being punctured and to be punctured Blood vessel wall；

Bearing, has the bottom surface directly or indirectly contacted with epidermis bottom it, described seat supports is also fixed Described indwelling body；

Sealing member, it is arranged to seal described passage.

Needing to explain and explanation, " near-end " of the indwelling body described in this utility model refers to stay Put body under indwelling occupancy state, be positioned at a section above epidermis；Same, described in this utility model " far-end " of indwelling body refer to that indwelling body is positioned at a section below epidermis under indwelling occupancy state.

The bottom of bearing has the bottom surface directly or indirectly contacted with epidermis, wherein " directly contacts " and refers to Directly fit with epidermis in bottom surface, and " mediate contact " refers to that bottom surface and epidermis are fitted by a thin layer, Fitted by a glue-line with top layer in such as bottom surface.

During hemodialysis, there is the epidermis indwelling apparatus for guided puncture of said structure Contribute to puncturing the quick formation in tunnel, can also play a protective role to puncturing tunnel simultaneously, and to thoroughly The piercing process of analysis pin or puncture needle plays guiding function.When patient needs to carry out hemodialysis, indwelling Body can enter object along with puncture needle via epidermis, or enters object via epidermis voluntarily, complete After having become a hemodialysis to pull out puncture needle, the far-end of indwelling body is still retained in object To play the effect of occupy-place, thus contribute to puncturing the quick formation in tunnel.On carrying out, once dialysis is worn During thorn, after puncture needle enters object via the passage of indwelling body, then carry out dialysis treatment, puncturing Pin enters in the piercing process of object, and piercing process is played and guides and the effect of protection by indwelling body.By Fixed by bearing in the position of indwelling body and angle of inclination, therefore, the no matter operation of dialysis puncture Whether person is same people, or whether the puncture experience of operator is enriched, and dialysis puncture can each time Ensure identical entry point, needle angle and depth of needle, the most just solve the enforcement of buttonhole puncturing method Difficulty problem.Additionally, use structure described in the utility model, so that the far-end of indwelling body is not Vascular compression wall, because of without causing wound to blood vessel wall.

In order to ensure enough support forces and intensity, the bearing in this utility model is adopted relative to indwelling body With harder material, such as PC material, equally in order to reduce the injury to object, this practicality as far as possible Indwelling body in novel have employed softer material, such as polyurethane material relative to bearing.It addition, In order to ensure biocompatibility, the indwelling body in this utility model should use the material of good biocompatibility Material.

It should be noted that the epidermis indwelling apparatus for guided puncture described in the utility model is not only fitted For hemodialysis, it is also applied for other therapeutic processes containing puncture procedure (such as, subcutaneous note Penetrate, subcutaneous Minimally Invasive Surgery, living body sampling etc.), therefore hemodialysis is not intended as the technical program Restriction.

Further, described in the utility model in the epidermis indwelling apparatus of guided puncture, described Angle between bottom surface and the axis of indwelling body of bearing is 20～40 degree.

In the technical program, the needle angle of puncture needle is the axle by the bottom surface of bearing Yu indwelling body Angle between line determines.Although for different operators, the inserting needle used when it punctures Angle may be different, but is usually at 20～40 degree in the range of this.Additionally, connect for same For the patient of dialysis treatment, it is desirable to the needle angle that punctures each time is all identical.Therefore, one Denier have passed through and punctures first, and this angle should be just the invariable angle value being determined.

Preferably, described in the utility model in the epidermis indwelling apparatus of guided puncture, described in stay Put the inner surface of body and/or outer surface or the inner surface of described indwelling body distal end and/or outer surface covers There is antimicrobial coating.

Use said structure, so that the technical program has more preferable antibacterial resistance bacterium effect, thus drop Low infection risk when being subcutaneously implanted.This antimicrobial coating can be silver ion coating or sulfadiazine coating, Or other antimicrobial coatings that those skilled in that art know.

Preferably, described in the utility model in the epidermis indwelling apparatus of guided puncture, described The bottom surface of seat is provided with some projections protruding from bottom surface.

Bottom surface is provided with projection, on the one hand can improve fixing effect, on the other hand it is also possible that the end There is between face and epidermis certain gap, thus improve the breathability of epidermis, reduce the wind of epidermis allergy Danger.

Further, the epidermis indwelling apparatus for guided puncture described in the utility model also includes hindering bacterium Waterproof ventilated membrane, it is covered in described epidermis indwelling apparatus and is positioned in the part above epidermis.

Owing to the epidermis indwelling apparatus for guided puncture described in the utility model is indwelling epidermis, because of This is during its indwelling, in order to improve antibacterial resistance bacterium effect further, can use resistance bacterium waterproof ventilated membrane Cover on it, additionally, this resistance bacterium waterproof ventilated membrane also acts as the effect of the most fixing epidermis indwelling apparatus.

Further, described in the utility model in the epidermis indwelling apparatus of guided puncture, described The exterior contour of bearing is dome-type or dome-type or mouse-type.

Carrier exterior profile is set to these shapes above-mentioned and contributes to grasping in operation bearing.When So, it would however also be possible to employ those skilled in that art know other can realize the bearing of this case technique effect Shape.

Further, described in the utility model in the epidermis indwelling apparatus of guided puncture, described There is on bearing the depression being easy to finger grip.

It should be noted that this utility model can be containing above-described in the embodiment that they are different One or more in preferred or further technical characteristic, and these one or more technical characteristics are can With mutual independent assortment.

Based on the epidermis indwelling apparatus for guided puncture described in the utility model, this utility model also carries Having supplied this to be used for the using method of the epidermis indwelling apparatus of guided puncture, it includes step:

(1) when treating first, indwelling body is guided to thrust object via epidermis；

(2) after treatment terminates first, by described epidermis indwelling instrument deployed in epidermis, with by indwelling tube The far-end indwelling of body carries out occupy-place in object, thus helps to form puncture tunnel；

(3) when upper once treatment beginning, the passage making puncture needle pass in indwelling tube body enters object, Treat described in carrying out next time；

Above-mentioned steps (3) is repeated until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It addition, after treatment terminates each time, can be in indwelling in the epidermis indwelling apparatus overlying lid of epidermis One layer of resistance bacterium waterproof ventilated membrane, and when upper once treatment beginning, first this resistance bacterium waterproof ventilated membrane is removed, Puncture needle is made to pass the passage in indwelling tube body and enter object again.

As the first embodiment of the present utility model, described in the utility model for guided puncture Epidermis indwelling apparatus in, described bearing is removably secured with indwelling body and is connected, described bearing with After the near-end of indwelling body connects, described bearing makes between the bottom surface of bearing and the axis of indwelling body Angle keep constant.

In this embodiment, bearing and indwelling body removably connect, and this allows in operation During, indwelling body can select an inserting needle according to the different demands of the operating habit of operator or patient Angle, after the far-end of indwelling body enters object, then is connected the near-end of bearing with indwelling body, With the angle between the axis of hold-down support bottom surface and indwelling body so that it is keep constant.Use this skill The benefit of art scheme is, owing to the angle between axis and the bottom surface of support saddle of indwelling body is adjustable, because of The epidermis indwelling apparatus of this same specification goes for different operators and patient.

Further, in this embodiment, described indwelling body includes body body and projects radially out The spherical head of body body, described spherical head is located at the near-end of indwelling body；Correspondingly, described It is provided with in Zuo and houses the first cavity of part described body body matchingly and house described ballhead matchingly Second cavity in portion.

The setting of said structure so that indwelling body enters the angle of object and do not fixes, so that base The regulation of the angle between the axis of bottom surface and indwelling body is convenient.Certainly, this utility model also may be used To use other can realize the structure of the angular adjustment between the axis of base end face and indwelling body.Separately Outward, in the technical scheme using this structure, indwelling body enters the length of object, namely mentioned above The development length of far-end of indwelling body can be limited by the annexation of spherical head with base, namely Say that the development length of its indwelling body distal end is constant for same epidermis indwelling apparatus.

Alternatively, in the above-described embodiment, for interference between described spherical head and described second cavity Coordinate.

Alternatively, in the above-described embodiment, the outer surface of described spherical head and/or described second cavity Inner surface be provided with frictional force convex between outer surface and the inner surface of the second cavity increasing spherical head Play lines.

The lines of above-mentioned projection can be can increasing of spiral type lines, profile of tooth lines or other shapes The protruding lines of frictional force.

Further, in the above-described embodiment, described bearing is provided with permission described spherical head entrance The U-shaped opening of the second cavity.

Further, in the above-described embodiment, described U-shaped opening is elastic u-shaped opening, described The bore of elastic u-shaped opening is slightly less than the external diameter of described spherical head.

Use above-mentioned this structure, so that spherical head can slip into the second of bearing conveniently and efficiently In cavity, thus it is rapidly completed the connection of bearing and indwelling body near-end.

Further, in the above-described embodiment, described sealing member includes that the first sealing member and second seals At least one of part, wherein the far-end of the first sealing member correspondence indwelling body is arranged, described second close The near-end of sealing correspondence indwelling body is arranged.

Preferably, described sealing member includes above-mentioned first sealing member and above-mentioned second sealing member, respectively far End and near-end arrange two sealing members and can improve the sealing effectiveness of the technical program, wherein far-end further The first sealing member the blood of object or body fluid can be stoped to enter in indwelling tube body, and the second of near-end is close Sealing can stop external contaminants to enter in indwelling tube body.

As the preferred implementation of one, described first sealing member and/or the second sealing member are located at described logical In road, described first sealing member and/or the second sealing member are diaphragm seal or sealing-plug.

Diaphragm seal or sealing-plug can realize preferable sealing effectiveness, and it is possible not only to realize liquid seal (example As, stop the blood of object or body fluid to enter indwelling body), even can also realize air seal, therefore Antibacterial, microorganism can be stoped to enter indwelling body with air.

It is further preferred that described diaphragm seal or sealing-plug are self sealss film or self sealss plug.

Described self sealss film or self sealss plug can be by silica gel, butyl rubber or other self-sealing material systems Become.

Employing self sealss film or self sealss plug are so that this sealing member is used repeatedly, without as one Secondary property parts are just replaced after using once, thus save material cost.

As the preferred implementation of another kind, described first sealing member is arranged on the far-end of indwelling body End is also formed as the part of indwelling body；Described first sealing member is also configured to allow puncture needle to lead to Cross the first sealing member and enter below epidermis, and do not allow body fluid to pass through the first sealing member and enter below epidermis Enter described passage.

It is to say, the first sealing member can allow puncture needle to pass through object, but do not allow visitor The blood of body or body fluid enter the passage in indwelling tube body from object in the opposite direction.

Described first sealing member can be duckbill valve or nipple valve.So-called " duckbill valve " is the art The end inside known has the valve of twitching one's mouth of yi word pattern opening.So-called " nipple valve " is a kind of similar nipple Valve arrangement, it has a hole in the end of valve, and this hole can be circular hole, bifurcation shape hole, cross bore, rice Word hole or other similar structures.

Further, in the above-described embodiment, distal tip and the close far-end of described indwelling body are last There is at end the tapered wedge-shaped part of direction external diameter towards described distal tip or curved portions.

This structure can reduce indwelling body resistance during entering object, so that indwelling body is more Easily enter object.

Further, in the above-described embodiment, the material of described indwelling body is selected from polyurethane, PEBAX (block polyether acidamide resin), LDPE (Low Density Polyethylene), or other have the stabilate compatibility Material ....

The indwelling body using these materials above-mentioned to make is relatively hard, so that indwelling body has more Good mouldability, and then make indwelling body can preferably play the effect of support, occupy-place and protection.

Further, in the above-described embodiment, the wall thickness of described indwelling body is 0.1-1mm.

Further, in the above-described embodiment, the bottom surface of described bearing is provided with mucigel, described viscose The one side of layer is bonding with described bottom surface, and the another side of described mucigel is for bonding with epidermis.

Mucigel makes bearing to be held even more securely in epidermis, thus provides more for indwelling body Stable support.

Further, described mucigel is the U-shaped sticker with release paper.

Above-mentioned mucigel can realize quickly pasting between bearing and epidermis.When hold-down support, remove First the either end of U-shaped release paper can be opened, the most clockwise or counterclockwise by release paper during release paper Take off from gum.

Based in the first embodiment above-mentioned for the epidermis indwelling apparatus of guided puncture, this utility model Additionally providing its using method, it includes step:

(1) when treating beginning first, make puncture needle pass the passage of indwelling body, then make puncture needle Object is thrust via epidermis together with indwelling body；Then, bearing is connected to the near-end of indwelling body, And hold-down support, so that the angle between the axis of the bottom surface of bearing and indwelling body keeps constant；

(2) after treatment terminates first, puncture needle is pulled out from object, by described epidermis indwelling apparatus Indwelling, in epidermis, so that the far-end indwelling of indwelling body is carried out in object occupy-place, thus helps formation to wear Thorn tunnel；

(3) when upper once treatment beginning, the passage making puncture needle pass in indwelling tube body enters object, Treating described in carrying out, described indwelling body is to be retained in epidermis after last treatment terminates next time The indwelling body of epidermis indwelling apparatus, or pulling out previous epidermis indwelling when starting for this treatment After apparatus, indwelling is in the indwelling body of the new epidermis indwelling apparatus of epidermis；

Above-mentioned steps (3) is repeated until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

Preferably, after treatment terminates each time, can be in indwelling in the epidermis indwelling apparatus overlying of epidermis Cover one layer of resistance bacterium waterproof ventilated membrane, and when upper once treatment beginning, first this resistance bacterium waterproof ventilated membrane is taken off Remove, then the passage making puncture needle pass in indwelling tube body enters object.

It should be noted that in the first embodiment, when the first sealing member and the second sealing member are During self sealss part, this epidermis indwelling apparatus being used for guided puncture can be in the some skies of epidermis indwelling or use In treatment several times, such as, can epidermis indwelling 3～5 days, or carry out after 3～5 treatments again Change.Certainly, same epidermis indwelling apparatus also may be used at time or the applicable treatment number of times of epidermis indwelling Suitable being decreased or increased is carried out with the biocompatibility according to this epidermis indwelling apparatus.

Alternatively, it is also possible to select to treat each time all one new epidermis indwelling apparatuses of replacing.Certainly, exist Before the epidermis indwelling apparatus more renewed, need to pull out old epidermis indwelling apparatus in advance.

As the second embodiment of the present utility model, described in the utility model for guided puncture Epidermis indwelling apparatus in, the near-end of described indwelling body is fixed in described bearing, described bearing On there is opening, described opening connects with the described passage of indwelling body with being mutually linked.

Unlike the first embodiment above-mentioned, in this second embodiment, indwelling body Near-end is to fix with bearing to be connected rather than removably connect, and this allows for same epidermis indwelling Angle between axis and the bottom surface of support saddle of the indwelling body in apparatus is fixing from the beginning, and not The most adjustable.Therefore, for meet different operating person or the demand of patient, the skin of plurality of specifications can be produced Table indwelling apparatus, the bottom surface of support saddle of epidermis indwelling apparatus and the axis of indwelling body of variant specification have Different angles, even, the indwelling body of the epidermis indwelling apparatus of variant specification has different length Far-end.

Although for same epidermis indwelling apparatus, the bottom surface of support saddle in this embodiment and indwelling tube Angle between the axis of body is the most adjustable, but compared to the first embodiment mentioned above, this The structure of the epidermis indwelling apparatus in embodiment is simpler, and therefore it uses process the most convenient.

In this another the second embodiment, the near-end of indwelling body can be fixing even by bonding and bearing Connect.It is of course also possible to by other fixed forms known in this area realize the near-end of indwelling body with Fixing connection between bearing.

Preferably, in this second embodiment, described opening is gradually reduced in bore from the outside to the core Wedge shape.

The puncture needle that will enter passage can be played guide effect by wedge-like opening.

Preferably, in this second embodiment, described bearing include supporting part that split arranges and after Lid, the hole in described supporting part and bonnet is collectively forming described opening.

Bearing uses the be more convenient for near-end of indwelling body of split type set-up mode to be fixedly installed in bearing In.

Further, in this second embodiment, described indwelling body is the blind of distal tip closing Pipe, described sealing member includes the distal tip of this closing, and the distal tip of this closing is arranged to can be by Puncture needle penetrates.

Preferably, in this second embodiment, the distal tip of described closing is wedge shaped or arc.

This structure can reduce indwelling body resistance during entering object, so that indwelling body is more Easily enter object.

Preferably, in this second embodiment, the wall thickness of the distal tip of described closing and/or hardness The wall thickness of other parts and/or hardness less than indwelling body.

Wall thickness and/or the hardness of other parts of indwelling body are relatively large, are to ensure that body has foot Enough intensity and hardness, thus provide more preferable support force with strong during puncturing the occupy-place that tunnel is formed Degree, provides preferably protection for object tissue in the piercing process of puncture needle simultaneously.And indwelling body Wall thickness and/or the hardness of distal tip are relatively small, are to be stung in piercing process for the ease of puncture needle Broken.

Preferably, in this second embodiment, described sealing member also includes diaphragm seal or sealing-plug, It is located at the near-end of described indwelling body or is located at the opening part of described bearing.

At the near-end of indwelling body or the opening part of bearing diaphragm seal is set or sealing-plug can improve further The sealing effectiveness of sealing member, thus prevent external contaminants from entering in indwelling tube body.Diaphragm seal or sealing Plug can realize preferable sealing effectiveness, and it is possible not only to realize liquid seal and (such as, stops object Blood or body fluid enter indwelling body), even can also realize air seal, therefore can stop antibacterial, Microorganism enters indwelling body with air.This diaphragm seal or sealing-plug can be that silica gel is made, it is also possible to It is that PTEE makes, or other satisfactory macromolecular materials are made.

It is further preferred that described bearing includes supporting part and the bonnet that split arranges, described supporting part and Hole in bonnet is collectively forming described opening, and described sealing member also includes that diaphragm seal, described diaphragm seal are consolidated It is scheduled between described supporting part and bonnet.

Diaphragm seal is arranged between supporting part and bonnet, and by bonnet press seal on supporting part, is one Plant advantageously diaphragm seal mounting means.

Preferably, described diaphragm seal or sealing-plug are self sealss film or self sealss plug.

Based in above-mentioned the second embodiment for the epidermis indwelling apparatus of guided puncture, this utility model Additionally providing its using method, it includes step:

(1) when treating beginning first, puncture needle thrusts object in advance treats first；

(2) after treatment terminates first, puncture needle is pulled out from object, wearing then along puncture needle The far-end of indwelling body is gradually thrust object, until the bottom surface of base connects with epidermis by thorn path via epidermis Touch；By described epidermis indwelling instrument deployed in epidermis, so that the far-end indwelling of indwelling body is entered in object Row occupy-place, thus help to form puncture tunnel；

(3) when upper once treatment beginning, the passage making puncture needle pass in indwelling tube body enters object, Treat described in carrying out next time；

(4) after on described, once treatment terminates, by described epidermis indwelling apparatus and puncture needle from object Pull out, the most at once the indwelling body distal end of a new epidermis indwelling apparatus is stung along described puncture tunnel Enter object, so that this new epidermis indwelling instrument deployed is in epidermis；

Above-mentioned steps (3) and (4) are repeated, until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It addition, after treatment terminates each time, can be in indwelling in the epidermis indwelling apparatus overlying lid of epidermis One layer of resistance bacterium waterproof ventilated membrane, and when upper once treatment beginning, first this resistance bacterium waterproof ventilated membrane is removed, The passage making puncture needle pass in indwelling tube body again enters object.

It can be seen from the above description that the epidermis indwelling for guided puncture in this second embodiment The use of apparatus is disposable, say, that it only allows puncture needle that it is carried out one-time puncture, one The distal tip of denier blind pipe is punctured, in order to ensure sealing effectiveness, after completing this treatment, it is necessary to The epidermis indwelling apparatus more renewed.But, if the material selected can realize the self sealss of blind pipe, should Epidermis indwelling apparatus can also be reused.

As the third embodiment of the present utility model, described in the utility model for guided puncture Epidermis indwelling apparatus in, the near-end of described indwelling body is fixed in described bearing, described bearing On there is opening, described opening connects with the described passage of indwelling body with being mutually linked；Described sealing member Including link block, described link block includes to be inserted in the pin in described indwelling tube body via described opening, The length of described pin is arranged to: with to described passage in described pin is inserted in described indwelling tube body When sealing, the tail end of described pin stretches out in the distal tip of described indwelling body.

Unlike first two embodiment, the sealing member in this embodiment is arranged to link block, And the pin of this link block is to be located at coaxially in indwelling tube body.Link block is to leading in indwelling tube body The sealing function in road is by coordinating and tolerance between the outer surface of link block and the inner surface of indwelling body Realizing, the most this sealing means whole realization is liquid seal, (such as, stops the blood of object Or body fluid enters indwelling body).Further, since the tail end of pin is the distal tip stretching out in indwelling body , therefore by indwelling after epidermis, this part stretches out in the pin of indwelling body distal tip and also functions to The effect of occupy-place.Additionally, the pin being located in indwelling tube body can also play enhancing indwelling body tube wall strong Degree effect, therefore, preferably under, pin also act as support indwelling body effect.

In this third embodiment, epidermis indwelling apparatus still can have previously described " described The development length of far-end is arranged to the end of described far-end and does not contact worn near the blood vessel wall being punctured Thorn blood vessel wall " technical characteristic, but owing to the tail end of pin stretches out in the distal tip of indwelling body, Therefore pin tail end will be closer to blood vessel wall relative to the distal tip of indwelling body, now in order to not increase The pressure of blood vessel wall, is preferably also configured as the tail end of pin it and does not contacts near the blood vessel wall being punctured The blood vessel wall being punctured, this setup will not vascular compression wall, thus also blood vessel wall will not be caused Wound.

Certainly, in other implementations, it is also possible to the tail end of pin is disposed in contact with blood vessel wall.

Preferably, in this third embodiment, described opening is gradually reduced in bore from the outside to the core Wedge shape.

The puncture needle that will enter passage can be played guide effect by wedge-like opening.

Further, in this third embodiment, described link block also includes and the head of described pin End connect connector, described connector be arranged to described bearing quick release be connected.

Further, described connector is provided with the first claw, correspondingly, described bearing be provided with Described first claw coupling draw-in groove, described first claw is connected with draw-in groove, with realize connector and The quick distachable of bearing connects.

Further, described connector includes that the head end with pin fixes the U-shaped beam being connected, described U The end of two arms of type beam is provided with described first claw, two arms of described U-shaped beam and be located at its end The first claw can be the most close, and discharge this pressure time reset.

Further, in this third embodiment, described in the utility model for guided puncture Epidermis indwelling apparatus also include that auxiliary member, the tail end of described auxiliary member are provided with for described draw-in groove mutually The second claw joined, described second claw is connected with described draw-in groove, to realize auxiliary member and bearing Quick distachable connects；The head end of described auxiliary member is provided with the connecting portion for being connected with puncture needle；Described Also there is on auxiliary member the groove for housing puncture needle.

Use during above-mentioned auxiliary member epidermis indwelling apparatus under pulling out the third embodiment above-mentioned.Wearing Before pricker enters object through indwelling pipe fitting, first by this auxiliary member by the connecting portion of its head end with wear Pricker connects, then via indwelling pipe fitting, puncture needle is thrust object, after puncture needle thrusts object, and auxiliary The tail end of part realizes quickly being connected, when treatment terminates by the second claw being connected and draw-in groove with bearing After, when needing to pull out epidermis indwelling apparatus, due to the annexation between auxiliary member and puncture needle and bearing, As long as exerting a force on puncture needle, it is possible to puncture needle is pulled out from object together with epidermis indwelling apparatus.

Further, described connecting portion includes radially-inwardly protruding step, and described step is used for and puncture needle Upper corresponding groove joining connects.

As another implementation of being connected of connector and bearing quick release ground, described connector Including fixing the U-shaped beam being connected with the head end of pin, the end of two arms of described U-shaped beam is provided with wedge shape Lead, correspondingly, described bearing is provided with the hole slot mated with described wedge shape lead；Described connection Part also includes O, and it is fixed near the head end of pin on described pin, when described pin is inserted When being located in described indwelling tube body to seal described passage, described O is located at pin and bearing Between to increase the frictional force between pin and bearing.

Preferably, in this third embodiment, described bearing is additionally provided with for being molded formation described Draw-in groove or the fabrication hole of hole slot.

Further, in this third embodiment, described pin be solid construction or at least tail end envelope The hollow structure inside closed.

If pin is arranged to solid construction, then relative to hollow structure, it can be indwelling tube body Tube wall provides more preferable support force.But the pin of hollow structure can more save material, thus reduces product Cost.

Preferably, in this third embodiment, the tail end of described pin is wedge shaped or arc.

This structure can reduce pin and enter the resistance during object, so that staying together with indwelling body The tail end putting body and pin is easier to enter object.

As a kind of implementation of the third embodiment above-mentioned, the external diameter of described pin is arranged to: On the axial direction of pin and indwelling body, described pin fits tightly with described indwelling body all the time.

In above-mentioned this structure, owing to pin fits tightly all the time with indwelling body, therefore this technical side Case has preferable sealing effectiveness, its may insure that indwelling body and pin enter subcutaneous after, do not have blood Liquid or body fluid enter between indwelling body and pin.Further, since pin the most closely pastes with indwelling body Closing, pin can also provide higher support force for indwelling body tube wall.

As another implementation of the third embodiment above-mentioned, described pin is at least included in it Being connected Part I and the Part II of setting on axial direction successively, described Part II is located at pin Tail end or the position near tail end, described Part I is positioned at the leading portion of Part II, wherein Part I External diameter be slightly less than the external diameter of Part II, and the external diameter of described Part I is slightly less than the interior of indwelling body Footpath, so that having gap between described Part I and indwelling body, described Part II and indwelling body Fit tightly.

In above-mentioned this structure, pin only just fits tightly with indwelling body at its end section, with Ensure sealing effectiveness.And the internal diameter being slightly lower than indwelling body arranged by the external diameter of pin remainder is (also The diameter of " passage " the most mentioned above), in order to reduce pin when entering and exiting indwelling body Frictional force, so that pin is more prone to when entering and exiting indwelling body.

Preferably, in the third embodiment above-mentioned, the outer surface of described pin is covered with antimicrobial coating.

This antimicrobial coating can be silver ion coating or sulfadiazine coating, or technology people in this area Other antimicrobial coatings that member knows.

Based in the third embodiment above-mentioned for the epidermis indwelling apparatus of guided puncture, this utility model Additionally providing its using method, it includes step:

(1) when treating beginning first, puncture needle thrusts object in advance treats first；

(2) after treatment terminates first, puncture needle is pulled out from object, wearing then along puncture needle The far-end of indwelling body is gradually thrust object together with link block by thorn path via epidermis, until base Bottom surface contact with epidermis；By described epidermis indwelling instrument deployed in epidermis, with the far-end by indwelling body In object, carry out occupy-place together with link block indwelling, thus help to form puncture tunnel；

(3) when upper once treatment beginning, first link block is extracted in indwelling tube body, then make puncture Pin enters object through the passage in indwelling tube body, treats described in carrying out next time；

(4) after on described, once treatment terminates, by described epidermis indwelling apparatus and puncture needle from object Pull out, the most at once by the indwelling body distal end of a new epidermis indwelling apparatus together with link block along described Puncture tunnel and thrust object, so that this new epidermis indwelling instrument deployed is in epidermis；

Above-mentioned steps (3) and (4) are repeated, until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It addition, after treatment terminates each time, can be in indwelling in the epidermis indwelling apparatus overlying lid of epidermis One layer of resistance bacterium waterproof ventilated membrane, and when upper once treatment beginning, first this resistance bacterium waterproof ventilated membrane is removed, After being extracted in indwelling tube body by link block, then the passage making puncture needle pass in indwelling tube body enters object.

It can be seen from the above description that the epidermis indwelling for guided puncture in this third embodiment The use of apparatus is also disposable, say, that it had better not be carried out Reusability.This be because of For under indwelling state, the pin tail end of link block is that the subcutaneous tissue with object contacts, and follow-up Operating process in, link block needs again to be pulled out from indwelling body, and this allows for link block easily quilt External contaminants is polluted.Therefore to ensure that apparatus is aseptic, it is proposed that treat each time and all change one New epidermis indwelling apparatus.

Further, institute is included when the epidermis indwelling apparatus for guided puncture in the third embodiment When stating auxiliary member, described step (3) includes step: upper once treatment starts time, first by link block from Extract in indwelling tube body, then make connection have the puncture needle of described auxiliary member through the passage in indwelling tube body Enter object, after puncture needle arrives a subcutaneous position, described auxiliary member is connected with bearing, carry out described Treat next time；Described step (4) includes step: after on described, once treatment terminates, at puncture needle Power is pulled out in upper applying, to be pulled out from object, the most at once together with epidermis indwelling apparatus by puncture needle The indwelling body distal end of one new epidermis indwelling apparatus is thrust visitor together with link block along described puncture tunnel Body, so that this new epidermis indwelling instrument deployed is in epidermis.

As the 4th kind of embodiment of the present utility model, described in the utility model for guided puncture Epidermis indwelling apparatus in, the near-end of described indwelling body is fixed in described bearing, described bearing On there is opening, described opening connects with the described passage of indwelling body with being mutually linked；Described sealing member Including link block, described link block includes to be inserted in the pin in described indwelling tube body via described opening, The length of described pin is arranged to: with to described passage in described pin is inserted in described indwelling tube body When sealing, the tail end of described pin stretches out in the distal tip of described indwelling body；In addition described Seat includes one ridge and from the outwardly directed alar part of one ridge, and the bottom surface of described alar part is formed or part landform Become the bottom surface of described bearing.

Identical with above the third embodiment, the sealing member in this embodiment is also set to close Offset, and the pin of this link block is to be located at coaxially in indwelling tube body, and the tail end of pin is in addition Stretch out in the distal tip of indwelling body.Link block is logical to the sealing function of the passage in indwelling tube body Cross between the outer surface of link block and the inner surface of indwelling body coordinate and tolerance realize, the most this Sealing means whole realization is liquid seal, (such as, stops the blood of object or body fluid to enter indwelling tube Body).Further, since the tail end of pin is the distal tip stretching out in indwelling body, therefore by indwelling After epidermis, this part stretches out in the pin of indwelling body distal tip and also functions to the effect of occupy-place.Additionally, Be located at the pin in indwelling tube body can also play strengthen indwelling body tube wall strength effect, therefore, Under this embodiment, pin also acts as the effect supporting indwelling body.

In the 4th kind of embodiment, epidermis indwelling apparatus still can have previously described " described The development length of far-end is arranged to the end of described far-end and does not contact worn near the blood vessel wall being punctured Thorn blood vessel wall " technical characteristic, but owing to the tail end of pin stretches out in the distal tip of indwelling body, Therefore pin tail end will be closer to blood vessel wall relative to the distal tip of indwelling body, now in order to not increase The pressure of blood vessel wall, is preferably also configured as the tail end of pin it and does not contacts near the blood vessel wall being punctured The blood vessel wall being punctured.This setup will not vascular compression wall, thus also blood vessel wall will not be caused Wound.

Certainly, in other implementations, it is also possible to the tail end of pin is disposed in contact with blood vessel wall.

Unlike above the third embodiment, in the 4th kind of embodiment, described bearing bag Including one ridge and from the outwardly directed alar part of one ridge, this makes bearing have more preferable support force.Additionally, The bearing with alar part also allows for operator's grasping in operation.

Further, in the 4th kind of embodiment, described alar part or described bearing are by silica gel, rubber Or polypropylene, or other materials with the stabilate compatibility make.

These materials above-mentioned are the softest, so that alar part can be folded or flexed into one when crawled Fixed angle, consequently facilitating the operation of operator.

Further, in the 4th kind of embodiment, the head end of described one ridge has groove, described Groove is by as the point of application taken out in indwelling tube body by link block, and the head end of described one ridge is relative One end near the opening of described bearing.

The setting of above-mentioned groove so that link block is more prone to be removed from indwelling body.

Further, in the 4th kind of embodiment, described pin be solid construction or at least tail end envelope The hollow structure inside closed.

If pin is arranged to solid construction, then relative to hollow structure, it can be indwelling tube body Tube wall provides more preferable support force.And the pin of hollow structure can more save material, thus reduce product Cost.

Further, in the 4th kind of embodiment, the tail end of described pin is wedge shaped or arc.

This structure can reduce pin and enter the resistance during object, so that staying together with indwelling body The tail end putting body and pin is easier to enter object.

As a kind of implementation of above-mentioned 4th kind of embodiment, the external diameter of described pin is arranged to: On the axial direction of pin and indwelling body, described pin fits tightly with described indwelling body all the time.

In above-mentioned this structure, owing to pin fits tightly all the time with indwelling body, therefore this technical side Case has preferable sealing effectiveness, its may insure that indwelling body and pin enter subcutaneous after, do not have blood Liquid or body fluid enter between indwelling body and pin.Further, since pin the most closely pastes with indwelling body Closing, pin can also provide higher support force for indwelling body tube wall.

As another implementation of above-mentioned 4th kind of embodiment, described pin is at least included in it Being connected Part I and the Part II of setting on axial direction successively, described Part II is located at pin Tail end or the position near tail end, described Part I is positioned at the leading portion of Part II, wherein Part I External diameter be slightly less than the external diameter of Part II, and the external diameter of described Part I is slightly less than the interior of indwelling body Footpath, so that having gap between described Part I and indwelling body, described Part II and indwelling body Fit tightly.

In above-mentioned this structure, pin only just fits tightly with indwelling body at its end section, with Ensure sealing effectiveness.And the internal diameter being slightly lower than indwelling body arranged by the external diameter of pin remainder is (also The diameter of " passage " the most mentioned above), in order to reduce pin when entering and exiting indwelling body Frictional force, so that pin is more prone to when entering and exiting indwelling body.

Preferably, in above-mentioned 4th kind of embodiment, the outer surface of described pin is covered with antimicrobial coating.

This antimicrobial coating can be silver ion coating or sulfadiazine coating, or technology people in this area Other antimicrobial coatings that member knows.

Further, in the 4th kind of embodiment, described link block also includes and the head of described pin The backstop boss that end connects, described backstop boss radially protruding is in described pin.

This backstop boss is for stoping pin to extend further into indwelling tube on the axial direction of indwelling body Body so that the tail end of pin enter just cannot be further continued for after the subcutaneous a certain extreme position of object to Front propelling.Additionally, this backstop boss is also during indwelling body and link block entrance object are subcutaneous, The thrust put on link block is acted on indwelling body further, so that the far-end of indwelling body enters Enter object.

Preferably, in the 4th kind of embodiment, described backstop boss has counterbore, in order to plant Enter device coupling to use, to be pushed below epidermis via described opening and indwelling body by described link block.

It is more prone to make indwelling body enter the subcutaneous process of object together with link block, can arrange State counterbore.When indwelling body is pushed object together with link block by needs, stay one independent of described epidermis One end correspondence of the bar-shaped implantation device putting apparatus is placed in described counterbore, by this bar-shaped implantation device to close Offset and indwelling body apply thrust, indwelling body and link block to be pushed in object.

Further, in the 4th kind of embodiment, described in the utility model for guided puncture Epidermis indwelling apparatus also includes the viscose part for described bearing is fixed on epidermis, in described viscose part Portion has hole, so that when viscose part is covered on described bearing, outside described one ridge is exposed to.

Based in above-mentioned 4th kind of embodiment for the epidermis indwelling apparatus of guided puncture, this utility model Additionally providing its using method, it includes step:

(1) when treating beginning first, puncture needle thrusts object in advance treats first；

(2) after treatment terminates first, puncture needle is pulled out from object, wearing then along puncture needle The far-end of indwelling body is gradually thrust object together with link block by thorn path via epidermis, until base Bottom surface contact with epidermis；By described epidermis indwelling instrument deployed in epidermis, with the far-end by indwelling body In object, carry out occupy-place together with link block indwelling, thus help to form puncture tunnel；

(3) when upper once treatment beginning, first link block is extracted in indwelling tube body, then make puncture Pin enters object through the passage in indwelling tube body, treats described in carrying out next time；

(4) after on described, once treatment terminates, by described epidermis indwelling apparatus and puncture needle from object Pull out, the most at once by the indwelling body distal end of a new epidermis indwelling apparatus together with link block along described Puncture tunnel and thrust object, so that this new epidermis indwelling instrument deployed is in epidermis；

Above-mentioned steps (3) and (4) are repeated, until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It addition, after treatment terminates each time, can be in indwelling in the epidermis indwelling apparatus overlying lid of epidermis One layer of resistance bacterium waterproof ventilated membrane, and when upper once treatment beginning, first this resistance bacterium waterproof ventilated membrane is removed, After being extracted in indwelling tube body by link block, then the passage making puncture needle pass in indwelling tube body enters object.

It can be seen from the above description that the epidermis indwelling for guided puncture in the 4th kind of embodiment The use of apparatus is also disposable, say, that it had better not be carried out Reusability.This be because of For under indwelling state, the pin tail end of link block is that the subcutaneous tissue with object contacts, and follow-up Operating process in, link block needs again to be pulled out from indwelling body, and this allows for link block easily quilt External contaminants is polluted.Therefore to ensure that apparatus is aseptic, it is proposed that treat each time and all change one New epidermis indwelling apparatus.

It should be noted that described herein each preferably, alternatively, further, the most further Ground or technical characteristic more preferably, do not occurring conflicting or in the case of conflicting, be can be mutual Independent assortment is to form various different technical schemes, and the claimed technical scheme of this utility model is also It is not limited to above-mentioned four kinds of embodiments.Additionally, each technical characteristic in above-mentioned four kinds of embodiments, not Occur conflicting or conflict in the case of, it is also possible to be mutually combined.The most in the first embodiment The each technical characteristic preferably, alternatively, further, further or more preferably described is also Can be used in the second embodiment or in the third embodiment or in the 4th kind of embodiment.

Epidermis indwelling apparatus for guided puncture described in the utility model can shorten in buttonhole puncturing method Puncture the maturation time in tunnel, thus help to set up puncture tunnel.Moreover, described in the utility model The epidermis indwelling apparatus for guided puncture can also puncture time immature puncture tunnel is protected Protect.Meanwhile, the epidermis indwelling apparatus for guided puncture described in the utility model can be with guided puncture Pin enters subcutaneous with " identical entry point, identical needle angle and identical depth of needle ", thus Greatly reduce the enforcement difficulty of buttonhole puncturing method, reduce the technology requirement to puncture procedure personnel, enter And beneficially being widely popularized of buttonhole puncturing method, also reduce the misery that patient produces because of puncture simultaneously.

Accompanying drawing explanation

Fig. 1 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment one In Split type structure schematic diagram.

Fig. 2 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment one In the top view of structure.

Fig. 3 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment one In side sectional view.

Fig. 4 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment one In the concrete structure of indwelling body.

Fig. 5 shows a kind of indwelling body with nipple valve arrangement.

Fig. 6 shows a kind of indwelling body with duck mouth valve structure.

Fig. 7 shows the epidermis indwelling device for guided puncture described in the utility model with the form of section view The concrete structure of tool bearing in embodiment one.

Fig. 8 shows the top view of the bearing shown in Fig. 7.

Fig. 9 shows the bearing in this case another kind embodiment.

Figure 10 shows the indwelling body in this case another kind embodiment.

Figure 11 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment The form of the mucigel in.

Figure 12 shows that, in this case embodiment one, bearing is fixed on the state on mucigel.

Figure 13 shows the mucigel in the another kind of embodiment of this case.

Figure 14, Figure 15, Figure 16 and Figure 17 respectively illustrate in this case embodiment one for guided puncture Epidermis indwelling apparatus use process each step in state.

Figure 18 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Structural representation in two.

Figure 19 is the side sectional view of Figure 18.

Figure 20 shows that the epidermis indwelling apparatus for guided puncture in this utility model embodiment two exists A kind of state during use.

Figure 21 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Lateral plan in three.

Figure 22 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Top view in three.

Figure 23 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Side sectional view in three.

Figure 24 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment The structure of the link block in three.

Figure 25 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Bearing in three and the structure of indwelling body.

Figure 26 shows the link block in this case another kind embodiment.

Figure 27 shows the state that the pin of the link block shown in Figure 26 is arranged in indwelling body.

Figure 28 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment The structure of the auxiliary member having under a kind of more preferably mode in three.

Figure 29 shows the sectional view of the auxiliary member shown in Figure 28.

Figure 30 shows the link block in another embodiment of this case.

Figure 31 shows the connection status of the link block shown in Figure 30 and bearing.

Figure 32 and Figure 33 shows the epidermis indwelling for guided puncture in this utility model embodiment three Apparatus different conditions in use.

Figure 34 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Structure in four.

Figure 35 shows the side sectional view of the epidermis indwelling apparatus shown in Figure 34.

Figure 36 shows the structure of the link block in another embodiment, and it is different from this case embodiment four In the structure of link block.

Figure 37 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment The structure of the bearing in four.

Figure 38 shows the structure of bearing embodiment four from another angle.

Figure 39 shows that the epidermis indwelling apparatus in this case embodiment four is fixed on the state of object epidermis.

Detailed description of the invention

Below in conjunction with Figure of description and specific embodiment to described in the utility model for guiding The epidermis indwelling apparatus punctured describes in detail further, but this detailed description is not constituted this reality With novel restriction.

Embodiment one

Fig. 1 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment one In Split type structure schematic diagram.

Fig. 2 show further this structure in embodiment one of epidermis indwelling apparatus for guided puncture Top view.

In order to clearly show that its structure further, Fig. 3 shows this epidermis indwelling for guided puncture Apparatus side sectional view in embodiment one.

As shown in Figure 1, Figure 2 and Figure 3, in this embodiment, described in the utility model for guiding The epidermis indwelling apparatus punctured includes: use the bearing 11 that PC material is made, mucigel 12, uses poly- Indwelling body 13 that urethane material is made and sealing member 141 and 142.Wherein, bearing 11 is by glutinous It is attached to mucigel 12 and the epidermis mediate contact of its bottom surface, thus provides firm for whole epidermis indwelling apparatus Support；Indwelling body 13 is connected with bearing 11, has basic along indwelling body in indwelling body 13 The passage P, this passage P that the length direction of 13 extends is used for biopsy needle guide (not shown), for Make puncture needle by less frictional resistance when by passage in indwelling tube body, at the present embodiment In, the diameter of passage P is slightly larger than the external diameter of puncture needle.From figure 3, it can be seen that indwelling body 13 There is the near-end being positioned under indwelling occupancy state above epidermis S and be positioned at the far-end below epidermis S, for Indwelling body 3 is made blood vessel wall not to be produced pressure, indwelling in the present embodiment under indwelling occupancy state The development length of the far-end of body 3 is arranged to the end of far-end and does not contacts near the blood vessel wall being punctured The blood vessel wall being punctured.Sealing member 141 and 142 it is provided with, in order to passage P to be sealed in passage P.

Fig. 4 shows the concrete structure of the indwelling body in embodiment one.

As shown in Figure 4, indwelling body includes the body body 132 of cylinder and projects radially out body originally The spherical head 131 of body 132, this spherical head can be placed in the spherical cavity of bearing 11 matchingly, So that indwelling body enters the variable-angle of object.It addition, have in the passage P of indwelling body The first sealing member 141 having the far-end being arranged on indwelling body and the second of the near-end being arranged on indwelling body Sealing member 142, wherein, the first sealing member 141 can stop the blood of object or body fluid to enter indwelling tube In the passage P of body, and the second sealing member 142 can stop external contaminants to enter the passage of indwelling body In P.Certainly, a sealing member can also be set in other examples.Preferably, first seal Part 141 and the second sealing member 142 are preferably both self sealss parts, after self sealss part can pass through puncturing thing Realize self sealss, such that it is able to be used repeatedly, and avoid being replaced after puncturing each time.From close Sealing can be made up of silica gel, butyl rubber or other self-sealing materials.In the present embodiment, first Sealing member 141 is thin self sealss film, and the second sealing member 142 is oneself slightly thick relative to the first sealing member Sealing-plug, certainly, in other examples, the two also can be exchanged, the i.e. first sealing member 141 For slightly thick self sealss plug, the second sealing member 142 is thin self sealss film, or the two can be basic The self sealss film of uniform thickness.

In other examples, the first sealing member of the far-end being located at indwelling body can also be arranged on The distal tip of indwelling body is also formed as the part of indwelling body, and this first sealing member allows puncture needle Enter below epidermis by the first sealing member, and do not allow body fluid or blood by the first sealing member from skin Enter below table in the passage of indwelling body.Such as, Fig. 6 and Fig. 7 just respectively illustrates above-mentioned this close Two kinds of different structures of sealing.

Fig. 5 shows a kind of indwelling body with nipple valve arrangement 143.As it is shown in figure 5, nipple valve Structure 143 has a hole in its end, and this hole can be circular hole, bifurcation word hole, cross bore, meter Zi Kong Or other similar structures.In operation, puncture needle can enter below epidermis by this hole, Otherwise, the body fluid of object or blood then cannot be entered below epidermis by this hole in the passage of indwelling body.

Fig. 6 shows a kind of indwelling body having duck mouth valve structure 144.As shown in Figure 6, this duckbill valve Being shaped like of structure 144, in duckbilled, has yi word pattern opening, in operation, wears in its end Pricker can be entered below epidermis by this yi word pattern opening, otherwise, body fluid or the blood of object then cannot Entered below epidermis by this yi word pattern opening in the passage of indwelling body.

Fig. 7 shows the epidermis indwelling device for guided puncture described in the utility model with the form of section view The concrete structure of tool bearing in embodiment one.

As it is shown in fig. 7, the inside of bearing 1 has houses the body body 132 shown in Fig. 5 matchingly First cavity 111 and house the second cavity 112 of the spherical head 131 shown in Fig. 5 matchingly.

Fig. 8 shows the top view of the bearing shown in Fig. 7.As shown in Figure 8, in the present embodiment, prop up Seat 11 also has the U-shaped opening 113 allowing the spherical head 131 of indwelling body to enter the second cavity 112, This U-shaped opening 113 is elastic, and its bore is slightly less than the external diameter of spherical head 131.Work as indwelling After the needle angle that the far-end of body determines with enters object, exert a force to bearing 11, make spherical head In 131 the second cavitys 112 slipping into bearing 11, thus it is near with indwelling body 13 to be rapidly completed bearing 11 The connection of end.It addition, bearing 11 also has just from Fig. 8 it can also be seen that in the present embodiment Depression 114 in finger grip.

In the present embodiment, it is interference fit between spherical head 131 and the second cavity 112, to ensure Bearing 11, after clinching is on indwelling body 13, can relatively rotate the most again.

In a further embodiment, can also ensure by other means between spherical head and the second cavity After bearing is connected with indwelling body near-end, the two does not relatively rotates.

Such as, the bearing during Fig. 9 shows another kind of embodiment.From fig. 9, it can be seen that this bearing with Seat structure in this case embodiment one is essentially identical, simply the second cavity of the bearing in this embodiment Inner surface has protruding lines 115, and this projection lines 115 can increase the second cavity and indwelling body Frictional force between spherical head, thus ensure bearing after clinching is on indwelling body, therebetween Can relatively rotate the most again.

The most such as, the indwelling body during Figure 10 shows another embodiment.From fig. 10 it can be seen that This indwelling body is essentially identical with the structure of the indwelling body in this case embodiment one, simply in this embodiment The outer surface of spherical head of indwelling body there is protruding lines 133, this projection lines 133 can increase Add the frictional force between the spherical head of the second cavity and indwelling body, thus ensure that bearing is staying in clinching After putting on body, can relatively rotate the most again.

In another embodiment, the inner surface of the second cavity of bearing and the spherical head of indwelling body Outer surface can all have protruding lines.

Protruding lines mentioned above can be the permissible of spiral type lines, profile of tooth lines or other shapes Increase frictional force projection lines.

In embodiment one, bearing 11 is removably secured with indwelling body 13 and is connected.By such as Indwelling body shown in Fig. 4 and bearing as shown in Figure 7, this allows in operation, indwelling tube Body 13 can select a needle angle to enter visitor according to the different demands of the operating habit of operator or patient Body, after the far-end of indwelling body 13 enters object, then the near-end by bearing 11 with indwelling body 13 Connect, thus fix the angle between the bottom surface of bearing 11 and the axis of indwelling body 13.Use this The benefit planting connected mode is so that the angle between axis and the bottom surface of bearing 11 of indwelling body 13 Being variable, therefore the epidermis indwelling apparatus of same specification goes for different operators and patient. In general, the angle between bottom surface and the axis of indwelling body 13 of bearing 11 can be 20～40 Change in the range of degree.

Although it addition, do not directly display the bottom surface of bearing in above-mentioned accompanying drawing, it is preferable that embodiment The bottom surface of the bearing 11 in is preferably provided with some projections protruding from bottom surface.These are protruding the most permissible Improve the effect that base is fixing, on the other hand it is also possible that have certain gap between bottom surface and epidermis, Thus improve the breathability of epidermis, reduce the risk of epidermis allergy.These projections can be configured so that gold word Tower-like or hemispherical.

In embodiment one, bearing 11 is fixed on object epidermis by mucigel 2.Figure 11 shows Show the mucigel 2 used in embodiment one, it can be seen from figure 11 that this mucigel 2 is one U-shaped glutinous Glue-line.

Figure 12 shows the state that bearing 11 is fixed in epidermis by mucigel 2.As shown in figure 12, prop up The bottom surface of seat 11 is bonding with the upper surface of mucigel 2, and the lower surface of mucigel 2 is bonding with the epidermis of object.

Figure 13 shows the mucigel in another kind of embodiment.As shown in fig. 13 that, this mucigel is tool There is the U-shaped sticker of release paper, the release paper of this mucigel has cut channel 121, when hold-down support, First the either end of U-shaped release paper can be opened when removing release paper, the most clockwise or counterclockwise will be from Type paper is taken off from gum.

It addition, in the present embodiment, the inner surface of indwelling body and/or outer surface are covered with antimicrobial coating, Thus reduce infection risk when being subcutaneously implanted.In other examples, in order to save material, it is possible to Only to coat antimicrobial coating on the inner surface and/or outer surface of indwelling body distal end.This antimicrobial coating is permissible It is silver ion coating or sulfadiazine coating, or other antibacterial paintings that those skilled in that art know Layer.

Preferably, the period of object epidermis it is retained at epidermis indwelling apparatus, it is also possible to cover one thereon Layer resistance bacterium waterproof ventilated membrane, to improve antibacterial resistance bacterium effect further.Additionally, this resistance bacterium waterproof ventilated membrane Also act as the effect of the most fixing epidermis indwelling apparatus.

It addition, from Fig. 3, Fig. 4 and Figure 10 it can also be seen that embodiment one and other implement In example, at the distal tip of indwelling body and close distal tip, there is the direction external diameter towards distal tip Tapered wedge-shaped part.From figure 5 it can be seen that in this embodiment, the far-end end of indwelling body At end and close distal tip, there is the tapered curved portions of direction external diameter towards distal tip.This Structure can reduce indwelling body and enter the resistance during object so that indwelling body be easier to into Enter object.

In the present embodiment, the wall thickness of indwelling body can be configured so that 0.1-1mm, such as 0.4mm.

The above-mentioned using method for the epidermis indwelling apparatus of guided puncture includes step:

(1) when treating beginning first, puncture needle N is made to pass the passage of indwelling body 11, such as Figure 14 Shown in, now indwelling body 11 is enclosed within puncture needle；Then make puncture needle N with indwelling body 11 thrust object via epidermis S together, as shown in figure 15, as can be seen from Figure 15, in this state Under, puncture needle enters blood vessel V, and the far-end of indwelling body 11 is positioned at below epidermis S, and far-end end Although end is near blood vessel V but do not contact the blood vessel wall of blood vessel V, being proximally located at of indwelling body 11 The top of epidermis S；Then, as shown in figure 16, bearing 13 is connected to the near-end of indwelling body 11, And bearing 13 is fixed in epidermis by mucigel 12, so that the bottom surface of bearing 11 and indwelling body Angle between the axis of 13 keeps constant, keeps this state to treat first；

(2) after treatment terminates first, puncture needle is pulled out from object, due to the restriction of bearing 11 Effect, this epidermis indwelling apparatus by indwelling in epidermis, so that the far-end indwelling of indwelling body is entered in object Row occupy-place, thus help formed puncture tunnel, in this case, the first sealing member in passage can in case Only blood or the body fluid of object enters in indwelling tube body, and the second sealing member in passage is possible to prevent outside dirty Dye thing enters in indwelling tube body, as shown in figure 17；Then, this epidermis indwelling apparatus covers one layer again Resistance bacterium waterproof ventilated membrane；Afterwards patient just can carry this epidermis indwelling apparatus go home have a rest；

(3) when upper once treatment beginning, first this resistance bacterium waterproof ventilated membrane is removed, then carry out routine After sterilization, it is possible to directly puncture needle through the passage in indwelling tube body and then is entered object, to carry out This treatment；

Above-mentioned steps (3) is repeated until treatment terminates.

In addition, it is necessary to explanation, the indwelling body in step (3) can be after last treatment terminates Be retained in the indwelling body of the old epidermis indwelling apparatus of epidermis, it is also possible to be this treatment start time After having pulled out previous epidermis indwelling apparatus, the indwelling body of the new epidermis indwelling apparatus changed.Namely Saying, the epidermis indwelling apparatus in embodiment one can be used repeatedly in repeatedly treatment, without Treat each time all change one new.Epidermis indwelling apparatus in embodiment one can be in epidermis indwelling 3～5 days, or carry out 3～5 times treatment after change again.Certainly, same epidermis indwelling apparatus is at skin Time or the applicable treatment number of times of table indwelling can also be according to the biocompatibility of this epidermis indwelling apparatus Carry out suitable being decreased or increased.

In addition, it is necessary to explanation, when treating first, puncture needle can be to use during treatment every time The sharpest keen general puncture needle, it is also possible to be the most blunt puncture needle, punctures employing more blunt first Puncture needle can create an obvious puncture tunnel.

Embodiment two

Figure 18 and Figure 19 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in reality Execute the structure in example two.

As shown in Figure 18 and Figure 19, in the present embodiment, this is used for the epidermis indwelling apparatus of guided puncture Indwelling body includes the bearing 21 of mouse-type using PC material to make and fixing with bearing 21 is connected Indwelling body.Wherein, bearing 21 includes supporting part 211 and bonnet 212, the bearing 21 that split arranges On there is opening O and the cavity for housing indwelling body being connected with opening O.Can from Figure 19 To be clear that, the wedge shape that opening O is gradually reduced in bore from the outside to the core, the opening of this structure can So that the puncture needle entering passage is played guide effect.Under indwelling state, the bottom surface of bearing 21 and object Epidermis contact.In the present embodiment, indwelling body is tail end closing, the blind pipe 23 of head end opening, should The inside of blind pipe 23 has the passage P extended the most along its length, this passage P for guided puncture Pin (not shown), in order to make puncture needle by less frictional resistance when by passage P, this In embodiment, the diameter of passage P is slightly larger than the external diameter of puncture needle.Blind pipe 23 is positioned at the part above epidermis For near-end, being positioned at the part below epidermis is far-end, for not vascular compression wall under indwelling state, this In embodiment, the development length of the far-end of blind pipe 23 is arranged to the end of far-end near the blood vessel being punctured The blood vessel wall that wall and not contacting is punctured.In the present embodiment, the tail end that blind pipe 23 is closed constitutes this reality By a part for novel described sealing member, and the tail end of this closing can be punctured pin and penetrate.It addition, Resistance suffered when entering object to reduce, in the present embodiment, the tail end of this closing is curved.Additionally, In the present embodiment, what sealing member also included being fixedly installed between supporting part 211 and bonnet 212 is close Sealer 43, this diaphragm seal is possible to prevent external contaminants to enter blind pipe 23, and this diaphragm seal 23 can be silicon Glue is made, it is also possible to be that PTEE makes, or other satisfactory macromolecular materials are made.

In the present embodiment, blind pipe 23 and bearing 21 is fixing that be connected rather than removably connects, This fixing connection can be by bonding realization, it is also possible to realized by other fixing connected modes.This is just Make, for same epidermis indwelling apparatus, between axis and bearing 21 bottom surface of blind pipe 23 Angle is fixing from the beginning, and the most adjustable.Therefore, for meet different operating person or patient Demand, the epidermis indwelling apparatus of plurality of specifications can be produced, so that the epidermis indwelling device of variant specification The bottom surface of support saddle of tool and the axis of blind pipe have different angles, such as 20～40 degree；Can also make the most not The indwelling body of the epidermis indwelling apparatus of same specification has the far-end of different length.

Furthermore it is preferred that in the present embodiment, the wall thickness closing tail end of blind pipe 23 and/or hardness are little The wall thickness of other parts and/or hardness in indwelling body.This is because, for the ease of lancet puncture, Wall thickness and/or the hardness of closing tail end should be less, but the remainder of blind pipe is preferably provided with relatively large Wall thickness and/or hardness, thus ensure that blind pipe has certain intensity, to puncture the occupy-place that tunnel is formed During provide more preferable support force, the most also in the piercing process of puncture needle for the offer of object tissue more Good protection.

In order to reduce infection risk when being subcutaneously implanted, it is preferable that in the present embodiment, blind pipe 23 interior Surface and/or outer surface are covered with antimicrobial coating.In other embodiments, it is also possible to only remote at blind pipe 23 The inner surface of end and/or outer surface antimicrobial coating.This antimicrobial coating can be silver ion coating or sulphur Amic metadiazine coating, or other antimicrobial coatings that those skilled in that art know.

Although it addition, be not explicitly illustrated in Figure 18 and Figure 19, it is preferable that the bottom surface of bearing 21 It is provided with some projections protruding from bottom surface.Bottom surface is provided with projection, on the one hand can improve fixing effect, On the other hand it is also possible that have certain gap between bottom surface and epidermis, thus the ventilative of epidermis is improved Property, reduce the risk of epidermis allergy.

Preferably, the epidermis indwelling apparatus described in the present embodiment can also cover resistance bacterium waterproof ventilated membrane, Thus improve antibacterial resistance bacterium effect further, additionally, this resistance bacterium waterproof ventilated membrane also acts as the most fixing The effect of epidermis indwelling apparatus.

It addition, although Figure 18 is shown without, the bearing 21 in this enforcement can also have is easy to finger gripping The depression held.

The above-mentioned using method for the epidermis indwelling apparatus of guided puncture includes step:

(1) when treating beginning first, puncture needle thrusts object in advance treats first；

(2) after treatment terminates first, puncture needle is pulled out from object, wearing then along puncture needle The far-end of blind pipe is gradually thrust object, until the bottom surface of base contacts with epidermis by thorn path via epidermis； By epidermis indwelling instrument deployed in epidermis, so that the far-end indwelling of indwelling body is carried out occupy-place in object, Thus help to form puncture tunnel, hinder bacterium waterproof ventilated membrane at this epidermis indwelling apparatus overlying lid, then suffer from Person is portable to go home to have a rest with epidermis indwelling apparatus；

(3) when upper once treatment beginning, first remove resistance bacterium waterproof ventilated membrane, carry out routine disinfection, so After make puncture needle N enter object through the passage in blind pipe, to carry out this treatment, as shown in figure 20 (object epidermis, tissue and blood vessel not shown in figure)；

(4) upper once treatment terminate after, epidermis indwelling apparatus and puncture needle are pulled out, so from object After at once by the blind pipe far-end of new epidermis indwelling apparatus along puncture tunnel thrust object, so that this is new Epidermis indwelling instrument deployed is in epidermis；

Above-mentioned steps (3) and (4) are repeated, until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It can be seen from the above description that during above-mentioned use, this is used for the epidermis indwelling of guided puncture The use of apparatus is disposable, say, that it only allows puncture needle that it is carried out one-time puncture, one The tail end of denier blind pipe is punctured, in order to ensure sealing effectiveness, after completing this treatment, it is necessary to change New epidermis indwelling apparatus.But, if the material selected can realize the self sealss of blind pipe, this epidermis Indwelling apparatus can also be reused.

Embodiment three

Figure 21 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Lateral plan in three.

Figure 22 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Top view in three.

Figure 23 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Side sectional view in three.

As shown in Figure 21, Figure 22 and Figure 23, in the present embodiment, this epidermis being used for guided puncture is stayed Put the bearing 31 that apparatus includes that PC material is made, the indwelling body being fixedly installed in bearing 31 33 and link block 44.Wherein, bearing having opening 311, link block 44 is inserted via opening 311 It is located in indwelling body 33, and its tail end stretches out in the distal tip of indwelling body 33.From Figure 23 In it can be seen that for the ease of the puncture needle that will enter passage being played guide effect (not shown), The wedge shape that opening 311 is gradually reduced in bore from the outside to the core.

Unlike embodiment one and embodiment two, the sealing member in the present embodiment is link block 44.Figure 24 show the structure of link block in the present embodiment.As shown in figure 24, link block 44 includes pin 441 And the connector being connected with the head end of pin 441.Pin 441 is to be located at indwelling body 33 coaxially In, and the tail end of pin 441 is the distal tip stretching out in indwelling body 33.Based on this knot Structure, this epidermis indwelling apparatus is by indwelling after epidermis, and this part stretches out in indwelling body 33 distal tip Pin also functions to the effect of occupy-place, stays additionally, the pin being located in indwelling body 33 can also play enhancing Put the effect of body tube wall strength.It addition, in the present embodiment, in order to not increase the pressure of blood vessel wall, The tail end of pin 441 is also set to it and does not contact the blood vessel being punctured near the blood vessel wall being punctured Wall, is the distal tip stretching out in indwelling body 33, therefore indwelling tube due to the tail end of pin 441 again The distal tip of body 33 is also proximate to the blood vessel wall that is punctured and does not contact the blood vessel wall that is punctured, but The tail end of pin 441 will be closer to blood vessel wall relative to the distal tip of indwelling body.It addition, from Figure 24 In it can also be seen that in the present embodiment, the tail end of pin 441 is curved, and this is to reduce pin The resistance being subject to during entering object together with indwelling body.In the present embodiment, connector is set For the structure that can quickly be connected with bearing and dismantle, specifically, connector includes and pin 441 Head end fixes the U-shaped beam 442 of connection, and be separately positioned on the end of two arms of U-shaped beam 442 First claw 443.

Figure 25 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Bearing in three and the structure of indwelling body.As can be seen from Figure 25, have for holding in bearing 31 Putting the cavity of indwelling body 33, indwelling body 33 is fixed in this cavity.It can be seen that in figure 23 that Having step 312 in this cavity, after indwelling body 33 stretches in cavity, indwelling body 33 is further Stretch into and can be stoped by this step 312, consequently facilitating quickly between location indwelling body 33 and bearing 31 Relative position.Please continue to refer to Figure 25, it can be seen that have convex shape step, platform on bearing 33 Both sides, rank have draw-in groove 313, and this draw-in groove 313 is for coordinating with the first claw 443, to realize bearing 31 Quick with link block 44 is connected and dismantles.Specifically, when needs, link block 44 is quickly connected to Time on bearing 31, press two arms pressing U-shaped beam 442 in opposite directions, and then drive a pair first claws 443 The most close, then the first claw 443 is inserted in draw-in groove 313, discharge pressure afterwards, this Time two arms of U-shaped beam 442 and the first claw 443 reset under elastic reaction, the first claw 443 blocks It is located in draw-in groove, completes link block 44 and be connected with the quick of bearing 31.When needs are by link block 44 Make under dismounting from bearing 31, press two arms pressing U-shaped beam 442 the most in opposite directions, and then drive a pair First claw 443 is the most close, is then deviate from from draw-in groove 313 by the first claw 443, complete Become the fast quick-detach of link block 44 and bearing 31.From Figure 25 it can also be seen that on bearing 31 also It is provided with for being molded the fabrication hole 314 forming draw-in groove 313.

It addition, from Figure 23 and Figure 24 it can also be seen that in the present embodiment, pin 441 is in axially side It is upwards isometrical, and pin 441 fits tightly with indwelling body 33 all the time.Due to pin 441 All the time fitting tightly with indwelling body 33, therefore the present embodiment has preferable sealing effectiveness.It addition, by All the time fitting tightly with indwelling body 33 in pin 441, pin 441 can also be for indwelling body 33 Tube wall provides higher support force.

Figure 26 and Figure 27 shows the link block in another kind of embodiment and the relation with indwelling body thereof. Link block shown in Figure 26 and Figure 27 is with the difference of the link block shown in Figure 23 and Figure 24, In the embodiment shown in Figure 26 and Figure 27, the pin of link block is not isometrical in its axial direction , but include at least two parts that external diameter is different, wherein the external diameter of end section 4411 is greater than main body The external diameter of part 4412.As can be seen from Figure 27, the end section 4411 of pin and indwelling body 33 fit tightly, thus ensure that sealing effectiveness so that blood or the body fluid of object cannot be introduced into In indwelling body.And the external diameter of the main part 4412 of pin is slightly less than the internal diameter of indwelling body 33, make Obtain and there is certain gap, relative to Figure 23 between main part 4412 and the indwelling body 33 of pin With the structure shown in Figure 24, this structure can reduce the pin friction when entering and exit indwelling body Power, so that pin is more prone to when entering and exiting indwelling body.

Preferably, in order to the most more easily pull out epidermis indwelling apparatus, the present embodiment can also wrap Include an auxiliary member.This auxiliary member can be connected with the bearing shown in Figure 21-23, Figure 25, it is possible to To be connected with the bearing shown in Figure 27.Figure 28 show schematically show the concrete structure of this auxiliary member. Figure 29 shows the structure of this auxiliary member in the way of sectional view.As shown in Figure 28 and Figure 29, this auxiliary The tail end of part 34 is provided with the second claw 341 being connected with the draw-in groove 313 on bearing 31, and this is second years old Claw 341 and the connection of draw-in groove 313, separation operation process and draw-in groove 313 mentioned above and the first card The connection of pawl 443, separation operation process are similar.The head end of auxiliary member 34 be provided with for puncture needle The connecting portion connected, such as, radially-inwardly protruding step 342 as shown in figure 29, this step 342 For groove joining corresponding with on puncture needle, thus realize the connection of puncture needle and auxiliary member.Certainly, In other examples, this connecting portion can also use other implementation, the most threaded, Snap connection, pin connection etc..It addition, from Figure 29 it can also be seen that auxiliary member 34 also have for The groove 343 of accommodating puncture needle.

Figure 30 and Figure 31 show the connector of link block be quickly connected with bearing and dismantle another Implementation.As can be seen from Figure 30, the connector being fixedly connected on pin head end also includes U-shaped Beam 442, the end of two arms of U-shaped beam 442 is provided with wedge shape lead 444, it addition, the head end of pin It is additionally provided with O 445.Adaptive with this connector, bearing as shown in figure 31 is provided with leads with wedge shape To the hole slot (in figure invisible) of post 444 coupling, additionally, be additionally provided with for being molded formation on bearing 31 The fabrication hole 314 of hole slot.When in pin is inserted in indwelling tube body to seal it, wedge shape guides Post 444 corresponding inserted is in the hole slot of bearing 31, and meanwhile, O 445 is arranged on pin and bearing Between, such that it is able to fix between link block and bearing by increasing the frictional force between pin and bearing Relative position, and then realize the connection of link block and bearing.When needs by link block from indwelling body When extracting, need to apply a pulling force more than frictional force to link block.

In addition, it is necessary to explanation is, although the pin that Figure 30 shows is isometrical, but it can also be by The structure of the pin being set in Figure 26.

In embodiment three, pin can be solid construction, it is also possible to be hollow structure.If pin quilt It is set to solid construction, then it can be that the tube wall of indwelling tube body provides preferably relative to hollow structure Support force.And the pin of hollow can more save material, there is lighter deadweight simultaneously.

It addition, in embodiment three, it is preferable that the outer surface of pin and the inner and outer surfaces of indwelling body It is covered with antimicrobial coating.This antimicrobial coating can be silver ion coating or sulfadiazine coating, or ability Other antimicrobial coatings that skilled person will understand that in territory.

Although it addition, be not explicitly illustrated in the figure of the present embodiment, it is preferable that the bottom surface of bearing 31 It is provided with some projections protruding from bottom surface.Bottom surface is provided with projection, on the one hand can improve fixing effect, On the other hand it is also possible that have certain gap between bottom surface and epidermis, thus the ventilative of epidermis is improved Property, reduce the risk of epidermis allergy.

Preferably, the epidermis indwelling apparatus described in the present embodiment can also cover resistance bacterium waterproof ventilated membrane, Thus improve antibacterial resistance bacterium effect further, additionally, this resistance bacterium waterproof ventilated membrane also acts as the most fixing The effect of epidermis indwelling apparatus.

It addition, in a further embodiment, bearing can also have the depression being easy to finger grip.

Additionally, the internal diameter of the indwelling body 33 in the present embodiment is preferably also slightly larger than the external diameter of puncture needle.

In the present embodiment, bearing 31 bottom surface of the epidermis indwelling apparatus of different size and indwelling body 33 Axis between angle can be configured so that 20～40 degree.But, for same epidermis indwelling apparatus For, the angle between bottom surface and the axis of indwelling body 33 of bearing 31 is changeless.

In the present embodiment, when link block is connected on bearing, the exterior contour of bearing can be in dome-type Or dome-type or mouse-type, consequently facilitating operator grips.

The above-mentioned using method for the epidermis indwelling apparatus of guided puncture includes step:

(1) when treating beginning first, puncture needle thrusts object in advance treats first；

(2) after treatment terminates first, puncture needle is pulled out from object, wearing then along puncture needle The far-end of indwelling body is gradually thrust object together with link block by thorn path via epidermis, until base Bottom surface contact with epidermis；By described epidermis indwelling instrument deployed in epidermis, with the far-end by indwelling body In object, carry out occupy-place together with link block indwelling, thus help to form puncture tunnel；In this epidermis Indwelling apparatus overlying lid resistance bacterium waterproof ventilated membrane, then patient is portable goes home to have a rest with epidermis indwelling apparatus；

(3) when upper once treatment beginning, first resistance bacterium waterproof ventilated membrane is removed, by link block from indwelling Extract in body, then make puncture needle N enter object through the passage in indwelling tube body, described to carry out Treat, as shown in figure 32 next time；

(4), after on described, once treatment terminates, epidermis indwelling apparatus and puncture needle are pulled out from object, The most at once the indwelling body distal end of a new epidermis indwelling apparatus is stung along puncturing tunnel together with link block Enter object, so that this new epidermis indwelling instrument deployed is in epidermis；

Above-mentioned steps (3) and (4) are repeated, until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It can be seen from the above description that the use of this epidermis indwelling apparatus is also disposable, say, that It had better not be carried out Reusability.This is because under indwelling state, the pin tail end of link block is Contact with the subcutaneous tissue of object, and in follow-up operating process, link block needs again from indwelling tube Being pulled out in body, this allows for link block and is easily polluted by external contaminants.Therefore to ensure that apparatus is Aseptic, it is proposed that treat all one new epidermis indwelling apparatuses of replacing each time.

When epidermis indwelling apparatus includes auxiliary member mentioned above, above-mentioned steps (3) includes step: When upper once treatment beginning, first link block is extracted in indwelling tube body, then make connection have auxiliary member The puncture needle N of 34 enters object through the passage in indwelling body 33, and puncture needle arrives a subcutaneous position After, auxiliary member 34 is connected with bearing 31, carries out this treatment, as shown in figure 33.Above-mentioned steps (4) Including step: after once treatment terminates on this, puncture needle N applies outside pulling force, will puncture Pin N pulls out from object together with epidermis indwelling apparatus, the most at once by a new epidermis indwelling apparatus Indwelling body distal end thrust object together with link block along puncturing tunnel, so that this new epidermis indwelling device Tool indwelling is in epidermis.

Embodiment four

Figure 34 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment Structure in four.

Figure 35 shows the side sectional view of the epidermis indwelling apparatus shown in Figure 34.

As shown in figs. 34 and 35, in the present embodiment, this is used for the epidermis indwelling apparatus of guided puncture The bearing 41 made including silica gel, the indwelling body 43 being fixedly installed in bearing 41 and link block 45.Wherein, bearing having opening 411, link block 45 is inserted in indwelling body 43 via opening 411 In, and the tail end of link block stretches out in the distal tip of indwelling body 43.Owing to the tail end of link block is Stretch out in the distal tip of indwelling body, therefore by indwelling after epidermis, this tail end also functions to occupy-place Effect.Additionally, the part being located in indwelling tube body can also play strengthens indwelling body tube wall strength Effect.It addition, in the present embodiment, in order to not increase the pressure of blood vessel wall, the tail end of link block 45 is also It is arranged to it and does not contact the blood vessel wall being punctured near the blood vessel wall being punctured, again due to link block 45 Tail end be the distal tip stretching out in indwelling body 43, therefore the distal tip of indwelling body 43 is also It is proximate to the blood vessel wall that is punctured and does not contact the blood vessel wall that is punctured, but the tail end phase of link block 45 Distal tip for indwelling body 43 will be closer to blood vessel wall.In the present embodiment, link block includes pin The backstop boss 453 that post 452 and the head end with pin 452 are connected.Backstop boss 453 is used for stoping pin Post 452 extends further into indwelling body on the axial direction of indwelling body, so that the tail end of pin Just cannot be further continued for pushing ahead after entering the subcutaneous a certain extreme position of object.Additionally, this backstop is convex Platform 453 also, during indwelling body and link block entrance object are subcutaneous, will put on link block Thrust acts on indwelling body further, so that the far-end of indwelling body enters object.Also may be used from figure To find out, the tail end of pin 452 is curved, and this is to reduce pin together with indwelling body entrance visitor The resistance being subject to during body.It addition, from Figure 35 it can also be seen that in the present embodiment, pin 452 It is isometrical in the axial direction, and pin 452 is tight with indwelling body 43 the most all the time Laminating.Owing to pin 452 fits tightly all the time with indwelling body 43, therefore the present embodiment has preferably Sealing effectiveness.Further, since pin 452 fits tightly all the time with indwelling body 43, pin 452 also may be used Think the support force that the tube wall offer of indwelling body 43 is higher.

Figure 36 shows the link block in another embodiment.This link block has pin 452 equally And the backstop boss 453 being connected with the head end of pin 452.But it is different from the link block shown in Figure 35 It is that the pin of the link block in Figure 36 is waney in its axial direction, but includes that external diameter is different At least two parts, wherein the external diameter of end section is greater than the external diameter of main part.This allows for, when When this link block inserts indwelling body, the end section of pin and indwelling body 43 fit tightly, from And ensure that sealing effectiveness so that the blood of object or body fluid cannot be introduced in indwelling body.And pin The external diameter of main part be slightly less than the internal diameter of indwelling body 43 so that the main part of pin and indwelling tube Having certain gap between body 43, relative to the structure shown in Figure 35, this structure can reduce pin The post frictional force when entering and exit indwelling body, so that pin is entering and is exiting indwelling body Time be more prone to.

Figure 37 shows that the epidermis indwelling apparatus for guided puncture described in the utility model is in embodiment The structure of the bearing in four.

Figure 38 shows the structure of bearing embodiment four from another angle.

As shown in Figure 37 and Figure 38, bearing includes one ridge 412 and from the outwardly directed alar part of one ridge 413.The head end of one ridge 412 has groove 414, this groove 414 can as by link block from indwelling The point of application taken out in body, consequently facilitating extract link block from indwelling body.

As can be seen from Figure 38, the bottom surface of bearing 41 is provided with and some protrudes from the pyramidal of bottom surface Protruding 415, on the one hand these are protruding can improve fixing effect, on the other hand it is also possible that bottom surface And there is between epidermis certain gap, thus improve the breathability of epidermis, reduce the risk of epidermis allergy. Certainly, in other examples, projection can also be arranged to other shapes, such as hemispherical etc..

It addition, have counterbore 451 from Figure 35 it can also be seen that on the backstop boss 453 of link block 45, This counterbore 451 mates use with implantation device.When indwelling body is pushed object together with link block by needs Time, it is placed in one in counterbore 451 independent of one end correspondence of the bar-shaped implantation device of epidermis indwelling apparatus, logical Cross this bar-shaped implantation device and apply thrust to link block and indwelling body, it is possible to easily by indwelling body Push in object with link block.

It addition, in the present embodiment, pin can be solid construction, it is also possible to be hollow structure.If Pin is solid construction, then relative to hollow structure, it can be that the tube wall of indwelling tube body provides preferably Support force.And the pin of hollow structure can more save material, the deadweight of self also can be lighter.

Furthermore it is preferred that in the present embodiment, the outer surface of pin and the inner and outer surfaces of indwelling body It is coated with antimicrobial coating.This antimicrobial coating can be silver ion coating or sulfadiazine coating, or this Other antimicrobial coatings that skilled person will understand that in field.

Additionally, the internal diameter of the indwelling body 43 in the present embodiment is preferably also slightly larger than the external diameter of puncture needle, from And reduce the puncture needle frictional force when entering indwelling body 43.

In the present embodiment, bearing 41 bottom surface of the epidermis indwelling apparatus of different size and indwelling body 43 Axis between angle can be configured so that 20～40 degree.But, for same epidermis indwelling apparatus For, the angle between bottom surface and the axis of indwelling body 43 of bearing 41 is changeless.

Figure 39 shows that the epidermis indwelling apparatus in this case embodiment four is fixed on the state of object epidermis.

As can be seen from Figure 39, this epidermis indwelling apparatus also includes for bearing 41 is fixed on epidermis Viscose part 42, the middle part of this viscose part 42 has hole, so that being covered in bearing 41 when viscose part 42 Time upper, outside one ridge 412 is exposed to, and alar part 413 is covered and is pasted in the epidermis of object. It addition, be retained in the period of epidermis at this epidermis indwelling apparatus, resistance bacterium waterproof ventilated membrane 5 is covered in this skin On table indwelling apparatus, thus improve antibacterial resistance bacterium effect further, additionally, this resistance bacterium waterproof ventilated membrane 5 Also act as the effect of the most fixing epidermis indwelling apparatus.

The above-mentioned using method for the epidermis indwelling apparatus of guided puncture includes step:

(1) when treating beginning first, puncture needle thrusts object in advance treats first；

(2) after treatment terminates first, puncture needle is pulled out from object, wearing then along puncture needle The far-end of indwelling body is gradually thrust object together with link block by thorn path via epidermis, until base Bottom surface contact with epidermis；Viscose part is used epidermis indwelling apparatus to fix indwelling in epidermis, with by indwelling The far-end of body carries out occupy-place together with link block indwelling in object, thus helps to form puncture tunnel； Hindering bacterium waterproof ventilated membrane at this epidermis indwelling apparatus overlying lid, then patient is portable with epidermis indwelling apparatus Go home to have a rest；

(3) when upper once treatment beginning, first resistance bacterium waterproof ventilated membrane is removed, by link block from indwelling Extract in body, then make the passage that puncture needle passes in indwelling tube body enter object, control carrying out this time Treat；

(4), after on this, once treatment terminates, epidermis indwelling apparatus and puncture needle are pulled out from object, The most at once the indwelling body distal end of a new epidermis indwelling apparatus is stung along puncturing tunnel together with link block Enter object, so that this new epidermis indwelling instrument deployed is in epidermis；

Above-mentioned steps (3) and (4) are repeated, until treatment terminates.

Above-mentioned treatment can be hemodialysis, it is also possible to be other treatment process, such as subcutaneous injection.

It can be seen from the above description that the use of above-mentioned epidermis indwelling apparatus is also disposable, namely Say, it had better not be carried out Reusability.This is because under indwelling state, the pin tail of link block End is that the subcutaneous tissue with object contacts, and in follow-up operating process, link block needs again from staying Putting in body and be pulled out, this allows for link block and is easily polluted by external contaminants.Therefore to guarantee device Tool is aseptic, it is proposed that treat all one new epidermis indwelling apparatuses of replacing each time.

It should be noted that only specific embodiment of the utility model listed above, it is clear that this practicality Novel it is not limited to above example, has the similar change of many therewith.If those skilled in the art The all deformation directly derived from this utility model disclosure or associate, all should belong to this practicality new The protection domain of type.

Claims (37)

1. the epidermis indwelling apparatus for guided puncture, it is characterised in that including:

Indwelling body, there is inside it passage substantially extended along the length direction of indwelling body, described passage is used for biopsy needle guide, the diameter of described passage is slightly larger than the external diameter of puncture needle, described indwelling body has the near-end being positioned under indwelling occupancy state above epidermis and is positioned at the far-end below epidermis, and the development length of described far-end is arranged to the end of described far-end and does not contact the blood vessel wall being punctured near the blood vessel wall being punctured；

Bearing, has the bottom surface directly or indirectly contacted with epidermis, described seat supports fixing described indwelling body bottom it；

Sealing member, it is arranged to seal described passage.

2. the epidermis indwelling apparatus for guided puncture as claimed in claim 1, it is characterised in that the angle between bottom surface and the axis of indwelling body of described bearing is 20～40 degree.

3. the epidermis indwelling apparatus for guided puncture as claimed in claim 1, it is characterised in that the inner surface of described indwelling body and/or outer surface or the inner surface of described indwelling body distal end and/or outer surface are covered with antimicrobial coating.

4. the epidermis indwelling apparatus for guided puncture as claimed in claim 1, it is characterised in that the bottom surface of described bearing is provided with some projections protruding from bottom surface.

5. the epidermis indwelling apparatus for guided puncture as claimed in claim 1, it is characterised in that also including hindering bacterium waterproof ventilated membrane, it is covered in described epidermis indwelling apparatus and is positioned in the part above epidermis.

6. the epidermis indwelling apparatus for guided puncture as claimed in claim 1, it is characterised in that the exterior contour of described bearing is dome-type or dome-type or mouse-type.

7. the epidermis indwelling apparatus for guided puncture as claimed in claim 1, it is characterised in that there is on described bearing the depression being easy to finger grip.

8. the epidermis indwelling apparatus for guided puncture as described in any one in claim 1-7, it is characterized in that, described bearing is removably secured with indwelling body and is connected, after the near-end of described bearing with indwelling body is connected, described bearing makes the angle between the bottom surface of bearing and the axis of indwelling body keep constant.

9. the epidermis indwelling apparatus for guided puncture as claimed in claim 8, it is characterised in that described indwelling body includes body body and projects radially out the spherical head of body body, and described spherical head is located at the near-end of indwelling body；Correspondingly, the first cavity housing part described body body matchingly and the second cavity housing described spherical head matchingly it are provided with in described bearing.

10. the epidermis indwelling apparatus for guided puncture as claimed in claim 9, it is characterised in that be interference fit between described spherical head and described second cavity.

11. as claimed in claim 9 for the epidermis indwelling apparatus of guided puncture, it is characterized in that, the outer surface of described spherical head and/or the inner surface of described second cavity are provided with the protruding lines of frictional force between outer surface and the inner surface of the second cavity increasing spherical head.

The 12. epidermis indwelling apparatuses for guided puncture as described in any one in claim 9-11, it is characterised in that described bearing is provided with the U-shaped opening allowing described spherical head to enter the second cavity.

13. as claimed in claim 12 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described U-shaped opening is elastic u-shaped opening, and the bore of described elastic u-shaped opening is slightly less than the external diameter of described spherical head.

14. as claimed in claim 8 for the epidermis indwelling apparatus of guided puncture, it is characterized in that, described sealing member includes at least one of the first sealing member and the second sealing member, wherein the far-end of the first sealing member correspondence indwelling body is arranged, and the near-end of described second sealing member correspondence indwelling body is arranged.

15. as claimed in claim 14 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described first sealing member and/or the second sealing member are located in described passage, and described first sealing member and/or the second sealing member are diaphragm seal or sealing-plug.

16. as claimed in claim 15 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described diaphragm seal or sealing-plug are self sealss film or self sealss plug.

17. as claimed in claim 14 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described first sealing member is arranged on the distal tip of indwelling body and is formed as a part for indwelling body；Described first sealing member is also configured to allow puncture needle to enter below epidermis by the first sealing member, does not allow body fluid to pass through the first sealing member and enters described passage below epidermis.

18. as claimed in claim 17 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described first sealing member is duckbill valve or nipple valve.

19. as claimed in claim 8 for the epidermis indwelling apparatus of guided puncture, it is characterised in that have the tapered wedge-shaped part of direction external diameter towards described distal tip or curved portions at the distal tip of described indwelling body and close distal tip.

20. as claimed in claim 8 for the epidermis indwelling apparatus of guided puncture, it is characterised in that the material of described indwelling body is selected from polyurethane or PEBAX or LDPE.

21. as claimed in claim 8 for the epidermis indwelling apparatus of guided puncture, it is characterised in that the wall thickness of described indwelling body is 0.1～1mm.

22. as claimed in claim 8 for the epidermis indwelling apparatus of guided puncture, it is characterised in that the bottom surface of described bearing is provided with mucigel, and the one side of described mucigel is bonding with described bottom surface, and the another side of described mucigel is for bonding with epidermis.

23. as claimed in claim 22 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described mucigel is the U-shaped sticker with release paper.

The 24. epidermis indwelling apparatuses for guided puncture as described in any one in claim 1-5, it is characterized in that, the near-end of described indwelling body is fixed in described bearing, and described bearing has opening, and described opening connects with the described passage of indwelling body with being mutually linked；Described sealing member includes link block, described link block includes to be inserted in the pin in described indwelling tube body via described opening, the length of described pin is arranged to: when in described pin is inserted in described indwelling tube body to seal described passage, the tail end of described pin stretches out in the distal tip of described indwelling body.

25. as claimed in claim 24 for the epidermis indwelling apparatus of guided puncture, it is characterised in that the wedge shape that described opening is gradually reduced in bore from the outside to the core.

26. as claimed in claim 24 for the epidermis indwelling apparatuses of guided puncture, it is characterised in that described link block also includes the connector being connected with the head end of described pin, described connector be arranged to described bearing quick release be connected.

27. as claimed in claim 26 for the epidermis indwelling apparatus of guided puncture, it is characterized in that, described connector is provided with the first claw, correspondingly, described bearing is provided with the draw-in groove matched with described first claw, described claw is connected with draw-in groove, is connected with the quick distachable of bearing realizing connector.

28. as claimed in claim 27 for the epidermis indwelling apparatus of guided puncture, it is characterized in that, described connector includes that the head end with pin fixes the U-shaped beam being connected, the end of two arms of described U-shaped beam is provided with described claw, two arms of described U-shaped beam and be located at the claw of its end can be the most close, and reset when discharging this pressure.

The 29. epidermis indwelling apparatuses for guided puncture as described in claim 27 or 28, it is characterized in that, also include auxiliary member, the tail end of described auxiliary member is provided with the second claw for matching with described draw-in groove, described second claw is connected with described draw-in groove, is connected with the quick distachable of bearing realizing auxiliary member；The head end of described auxiliary member is provided with the connecting portion for being connected with puncture needle；Also there is on described auxiliary member the groove for housing puncture needle.

30. as claimed in claim 29 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described connecting portion includes radially-inwardly protruding step, and described step connects for groove joining corresponding with on puncture needle.

31. as claimed in claim 26 for the epidermis indwelling apparatus of guided puncture, it is characterized in that, described connector includes that the head end with pin fixes the U-shaped beam being connected, the end of two arms of described U-shaped beam is provided with wedge shape lead, correspondingly, described bearing is provided with the hole slot mated with described wedge shape lead；Described connector also includes O, it is fixed near the head end of pin on described pin, when in described pin is inserted in described indwelling tube body to seal described passage, described O is located between pin and bearing to increase the frictional force between pin and bearing.

32. such as claim 27-28, the epidermis indwelling apparatus for guided puncture described in any one in 30-31, it is characterised in that be additionally provided with on described bearing for being molded the described draw-in groove of formation or the fabrication hole of hole slot.

33. as claimed in claim 24 for the epidermis indwelling apparatus of guided puncture, it is characterised in that described pin is solid construction or the hollow structure inside of at least tail end closing.

34. as claimed in claim 24 for the epidermis indwelling apparatuses of guided puncture, it is characterised in that the tail end of described pin is wedge shaped or arc.

35. as claimed in claim 24 for the epidermis indwelling apparatus of guided puncture, it is characterised in that the external diameter of described pin is arranged to: on the axial direction of pin and indwelling body, and described pin fits tightly with described indwelling body all the time.

36. as claimed in claim 24 for the epidermis indwelling apparatus of guided puncture, it is characterized in that, described pin at least includes Part I and the Part II being connected setting the most successively, described Part II is located at the tail end of pin or near the position of tail end, wherein the external diameter of Part I is slightly less than the external diameter of Part II, and the external diameter of described Part I is slightly less than the internal diameter of indwelling body, so that having gap between described Part I and indwelling body, described Part II fits tightly with indwelling body.

37. as claimed in claim 24 for the epidermis indwelling apparatus of guided puncture, it is characterised in that the outer surface of described pin is covered with antimicrobial coating.