CN208404775U - A kind of PICC sets the minimally invasive expansion sheath group of pipe - Google Patents

Abstract

The utility model discloses a kind of PICC to set the minimally invasive expansion sheath group of pipe, including puncture needle component and expand skin device assembly, and seal wire, the puncture needle component includes puncture needle and is socketed in external tubular level-one and expands sheath, the puncture needle front end stretches out the level-one and expands sheath, and the level-one expands sheath front end rounding；The tubular for expanding skin device assembly and reducing in front end expands sheath including importing sheath and being socketed in the second level imported outside sheath, and the importing sheath front end rounding simultaneously stretches out the second level expansion sheath, and the second level expands sheath front end rounding；The level-one that the seal wire diameter is less than expands sheath and the internal diameter for importing sheath, and the level-one expands sheath outer diameter and is equal to the outer diameter for importing sheath front end.By way of expanding skin step by step, realizes the effect for expanding skin, setting pipe, solve the problems, such as that skin injury is big in the prior art, amount of bleeding is big, reduce complication and Wound healing time, Wound healing effect is optimized, the pain of patient is reduced, and simplifies operating procedure.

Description

A kind of PICC sets the minimally invasive expansion sheath group of pipe

Technical field

The utility model relates to medical instruments field more particularly to the puncture instruments of Deep venou, are a kind of specifically PICC sets the minimally invasive expansion sheath group of pipe.

Background technique

Peripherally inserted central catheter (peripherallyinsertedcentralcatheter) technology is By a flagelliform PICC conduit, it is inserted into the Deep venou of human body, by drug direct infusion blood flow velocity is fast, blood flow In big Deep venou, stimulation and damage of the drug to periphery thin vessels and skin can be prevented.PICC pipe is one by high-grade Softness made of medical silica-gel, flexible conduit, it is good with the compatibility of blood vessel and can retain for a long time in vivo, for It needs to carry out the conveying of drug Deep venou for a long time or needs the patient of multiple injection dripping of irritant drugs, can be kept away using PICC technology Exempt from repeatedly to puncture and vascular wall is damaged.

From the 1990s since China carries out, because its is easy to carry, the small, few intercurrent disease of pain, nurse operation, just In superiority such as Preserving times by wide clinical application.In recent years, under us guide combine improvement Sai Dingge technology (modifiedselingertechnique.MST) row central vein catheter (peripherauy insertedcentral Popularizing catheter.PICC), substantially increases and sets pipe success rate, reduces mechanical phlebitis, point of puncture infection, conduit The complication such as unexpected extraction, thrombosis, PICC embody brilliant effect in terms of protecting patients undergoing chemotherapy blood vessel, are facing at present Bed uses extensive.

PICC method of intubation is continuously improved, the most frequently used, advanced at present, is in Vascular Ultrasonography (U1 mono- Trasonography, US) it guides and is set in conjunction with improvement Sai Dingge technology (Modified Seldinger Technique, MST) down Pipe.Its step mainly has:

Step 1 punctures, and carries out venipuncture under Vascular Ultrasonography guidance；

Step 2, fixed 18G puncture needle；

Step 3 introduces seal wire, and seal wire is slowly sent into blood vessel by puncture needle；

Puncture needle, indwelling seal wire are withdrawn from step 4, the withdraw of the needle；

Step 5, expands skin, and point of puncture local anaesthesia does notch in skin surface using dermatotome or scalpel is expanded；

Step 6 send sheath, and the component that expander and intubation sheath are constituted is placed on seal wire and is advanced into intravascular；

Step 7, withdraws from expander and seal wire, and indwelling is intubated sheath；

PICC conduit is sent into blood vessel by intubation sheath by step 8.

" local anaesthesia " operation in step 5 is illustrated at this, often contains in local anesthetic solution and is possible to cause Vessel retraction ingredient, for different patients, blood vessel has different degrees of contraction after injecting anesthetic drug, due to needing to pass through Puncture needle is to intravascular feeding seal wire, it is necessary to using being relatively large in diameter, can hold the puncture needle that seal wire passes through, therefore to avoid arcotic Object influences localised puncture early period, usually carries out local anaesthesia after localised puncture early period, before expanding wound using expansion dermatotome.

Existing puncture method must use expansion dermatotome to cut skin expansion wound at point of puncture, expand skin using dermatotome is expanded Method will lead to a large amount of oozings of blood of capillary rupture, point of puncture, and inevitable, and oozing of blood processing induces thrombus, infection not in time Etc. complication, and directly adopt to expand dermatotome and expand skin and will increase the pain of patient, extend the healing time and recovery effects of wound.

Utility model content

The purpose of this utility model is to provide a kind of PICC to set the minimally invasive expansion sheath group of pipe, adopts in the prior art for solving With when expanding dermatotome and expanding skin, the big problem of skin injury, amount of bleeding can be expanded, reduce complication and Wound healing time, optimization wound Mouth healing effect, reduces the pain of patient.

The utility model is achieved through the following technical solutions:

A kind of PICC sets the minimally invasive expansion sheath group of pipe, including puncture needle component and expands skin device assembly and surface is coated with silicon painting The seal wire of layer, the puncture needle component includes puncture needle and is socketed in external tubular level-one and expands sheath, before the puncture needle End stretches out the level-one and expands sheath, and the level-one expands sheath front end rounding；The skin device assembly that expands is in the tubular that front end reduces, packet It includes the importing sheath with toughness and is socketed in the second level expansion sheath imported outside sheath, described in the importing sheath front end rounding and stretching Second level expands sheath, and the second level expands sheath front end rounding；The seal wire diameter is less than the level-one and expands sheath and the importing sheath Internal diameter, the level-one expands sheath outer diameter and is equal to the outer diameter for importing sheath front end.

It is worth noting that the silicon coating of the seal wire surface coating is medical silica gel, medical silica gel is non-toxic and tasteless, physiology Inertia, resistance to biological aging, to the reaction very little of tissue, into tissue after will not cause rejection, herein especially Coated on the seal wire surface.The level-one expands sheath front end rounding and refers to, the level-one expands sheath front end and is in and the puncture The arc of wire surface smooth transition；The second level expands sheath front end rounding and refers to, it is in lead with described that the second level, which expands sheath front end, Enter the arc of sheath smooth surface transition；Importing sheath front end rounding refers to that the sheath front end that imports is in the fillet being easily inserted. The setting of above-mentioned fillet facilitates insertion into other than blood vessel, also in addition to realizing seamless socket, smooth transition between each component being socketed So that each component will not damage venous valve when entering vein blood vessel.Venous valve is prominent into lumen from endangium And the valve formed, it is two semilune thin slices, opposite to each other, root is connected with tunica intima of vein, and free edge is towards blood flow side To having prevents blood back flow effect, and for whole body in addition to the vein of the organs such as internal organ, brain and incidence is without vein valve, remaining is each The vein in portion all has the valve for preventing blood back flow.

It is as follows that the step of PICC sets pipe is carried out using the utility model:

Step I punctures and once expands skin, point of puncture local anaesthesia, under Vascular Ultrasonography guidance using puncture needle component into Row vein punctures；

Step II, the withdraw of the needle, fixed level-one expand sheath, exit puncture needle,

Step III, seal wire is introduced, seal wire is expanded into sheath by the level-one and is sent into blood vessel；

Step IV, it withdraws from the level-one and expands sheath, seal wire described in indwelling；

Step V, sheath and secondary expansion skin are sent, skin device assembly will be expanded and be placed on the seal wire and be advanced into intravascular；

Step VI, it withdraws from and imports sheath and the seal wire, indwelling and fixed second level expansion sheath；

Step VII, PICC conduit is expanded into sheath by the second level and is sent into blood vessel.

The method that the utility model optimizes original puncture needle guiding guide wires therein sets socket level-one for the puncture needle and expands The component of sheath, abandons the method that original expansion dermatotome expands skin, expands the expansion skin device assembly that sheath is constituted using importing sheath and level-one, Front end external diameter expands the equal importing sheath of sheath outer diameter with the level-one and is inserted into wound along the seal wire, and the importing sheath support is big Wound simultaneously introduces the bigger second level expansion sheath of internal diameter, and after secondary expansion skin, the PICC conduit passes through the second level and expands skin Sheath is inserted into blood vessel.The puncture needle component once expands skin, removes the puncture needle, and the seal wire can expand skin via the level-one Sheath is inserted into blood vessel, compared to original puncture needle guiding guide wires therein, the internal diameter of the diameter of the puncture needle and level-one expansion sheath Can not by puncturing complexity constraint, the internal diameter that the level-one expands sheath can be set to be more convenient for the seal wire pass through it is big Small, the puncture needle can be thinner than existing puncture needle, and the initial wound of the puncture needle more detailed rules and regulations is smaller and is easier insertion blood Pipe, be not easy to occur when carrying out localised puncture due to blood vessel is relatively thin and the case where can not be inserted into, advance can punctured Row local anaesthesia；By the secondary expansion skin of expansion skin device assembly, expand skin compared to original expansion dermatotome, simplifies original expansion skin step It is rapid to realize the double action expanded skin and send sheath with the step of sending sheath step, only carry out secondary expansion skin.By once expanding skin and two Bark effect is expanded in the secondary operation for expanding skin, realization step by step, is not only convenient for introducing seal wire, can also realize that minimally invasive expansion skin introduces PICC and leads Pipe, does not cause secondary injury to skin, and wound is small, amount of bleeding is small and easy healing, and local anaesthesia can be carried out before puncture, It solves the problems, such as that skin injury is big in the prior art, amount of bleeding is big, reduces complication and Wound healing time, optimize wound Mouth healing effect, reduces the pain of patient.During vascular puncture, the puncture needle component, seal wire and expansion of the utility model Skin device assembly is indispensable.

Preferably, the puncture needle includes the needle handle and the needle body being fixedly connected, the smooth closing nothing of needle body Opening, the needle handle are in be inverted polygon prism-frustum-shaped from the front to the back.When carrying out puncture procedure, finger is to the puncture needle component Power be resultant force to major axes orientation and forward end, if the component for forward end of advocating required for puncture, compared to common The polygon terrace with edge inclined-plane of cylindric needle handle, the needle handle can provide the bigger equilibrant force towards rear end to finger, thus In the case where the component of the puncture needle component forward end is constant, finger subtracts to the resultant force that the puncture needle component is applied Small, the outer shape setting of the needle handle more meets ergonomic designs, is conducive to vascular puncture；Due to without by the needle body The seal wire is imported into blood vessel, when exiting the puncture needle, sheath hemostasis can be expanded to press blood vessel and level-one in the withdraw of the needle, it can To reduce amount of bleeding.

Preferably, it includes the level-one socket and level-one sheath being fixedly connected that the level-one, which expands sheath, outside the level-one socket Portion is in inverted taper from the front to the back, and shaggy crescent shape recess portion, the level-one socket are symmetrically arranged in the taper The tapered nest of interior forward end, Internal back end are equipped with spline, and open rearward end edge is in inclined-plane；The needle handle front end integrally formed with The plug connector of the needle body is wrapped, the plug connector is in a circular table shape and there is spline on surface, and the spline is mutually fitted with spline It answers.The taper nest setting of level-one receptacle interior front end and the inclined-plane at open rearward end edge are arranged, and play and lead convenient for described The effect of silk insertion, the spline and spline cooperation, limit the puncture needle and level-one expansion sheath generation is opposite Rotation is conducive to puncture and once expand skin.In addition improvement that level-one expansion sheath further progress is met to ergonomics, by institute It states level-one socket and is set as inverted taper, and shaggy crescent shape recess portion is set in conical surface, pinch and hold convenient for finger, Need level-one expansion sheath being pushed further into blood vessel when expanding skin, inclined-plane finger can be provided power be more converted into Be pushed forward into power, can preferably using finger provide strength carry out expand skin work.

Preferably, the sheath that imports includes importing sheath and is from the front to the back in the sheath handle for being inverted polygon prism-frustum-shaped, described Sheath rear end is imported through the sheath handle and is fixedly connected, importing sheath (42) material is bismuth oxide.It is grasped similar to puncturing Make, when carrying out the operation of secondary expansion skin, needs the expansion skin device assembly being sent into blood vessel by seal wire guidance, finger is to institute State that expand the power of skin device assembly be resultant force to major axes orientation and forward end, if sending the component for forward end of advocating required for sheath, Compared to common cylindric needle handle, the polygon terrace with edge inclined-plane of the sheath handle can provide bigger towards rear end to finger Equilibrant force, so that finger is applied to the expansion skin device assembly in the case where the component for expanding skin device assembly forward end is constant The resultant force added reduces, and the outer shape setting of the sheath handle more meets ergonomic designs, is conducive to send sheath and secondary expansion skin.

Preferably, it includes the second level socket and second level sheath being fixedly connected that the second level, which expands sheath, in the second level socket The tapered nest in portion front end, open rearward end edge are in inclined-plane；Sheath handle front end, which is additionally provided with, wraps up the connection for importing sheath Column, the connecting column and the socket are adapted；Second level sheath (52) material is bismuth oxide, and surface is coated with dipotassium base Acrylamide-glycidyl methacrylate block copolymer.Similar to the level-one socket, the second level receptacle interior The taper nest setting of front end and the inclined-plane at open rearward end edge are arranged, and play the effect convenient for seal wire insertion；It recycles Frictional force between the connecting column and the socket limits the importing sheath and second level expansion sheath is opposite when sending sheath It is mobile, be conducive to send sheath and secondary expansion skin.

Preferably, the connecting column is threaded post, and the second level socket inner wall is provided with screw thread and the threaded post cooperates. It is threadedly engaged to further strengthen and limits the importing sheath and second level expansion sheath relative movement, needing to exit the importing sheath When, the importing sheath is rotated outward, the importing sheath can expand sheath with the second level and separate and be gradually backed out blood vessel.

Preferably, the socket rear end is provided with spline, and the connecting column rear end is provided with adaptable spline, described Spherical elastic grain is also symmetrically arranged on connecting column, the elasticity grain is located at the spline front end, sets in the second level socket It is equipped with the positive stop strip for being located exactly at the elastic grain rear end.The spline and spline cooperation limit the importing sheath and institute It states second level and expands sheath relative rotation, the spherical elastic grain and positive stop strip limit the importing sheath and second level expansion sheath is opposite It is moved forward and backward, when needing to exit the importing sheath, finger imposes power backward to the sheath handle, can draw the elastic grain The positive stop strip out.

Preferably, integrally formed with symmetrical lug outside the second level socket.When extracting the importing sheath backward, thumb The lug that the second level expands on sheath is gently resisted or pinched with index finger, and excess-three, which refers to, pulls back the importing with palm cooperation Sheath makes the importing sheath and the second level expand sheath and is detached from, then decontrols the lug, pulls out the importing sheath.

Preferably, the importing sheath rear end is fixedly connected with medical grade rubber ring.The seal wire runs through the importing sheath, When pulling out the importing sheath, medical grade rubber ring is pinched, has just pinched the seal wire and the importing sheath simultaneously, it can be primary Property withdraws from the seal wire and the importing sheath simultaneously, and seven the prior art the step of in " withdraw from expander and seal wire " behaviour Make, usually only the operator with skilled experience could disposably withdraw from the expander and the seal wire.

Preferably, the needle handle rear end is also integrally formed with the terrace with edge or rotary table being gradually increased from the front to the back.In the withdraw of the needle, Opposite puncture process, finger advocate to the resultant force that the power of the puncture needle is to major axes orientation and rear end required for puncture If the component of rear end, the terrace with edge or rotary table inclined-plane of the needle handle rear end can provide bigger towards the flat of front end to finger Weigh power, so that finger subtracts to the resultant force that the puncture needle is applied in the case where the component of the puncture needle rear end is constant Small, the outer shape setting of the needle handle more meets ergonomic designs, and the withdraw of the needle is more laborsaving and is not easy to skid.

The utility model compared with prior art, have the following advantages that and the utility model has the advantages that

(1) primary expansion skin is carried out by puncture needle component, carries out secondary expansion skin by expanding sheath component, skin is expanded in realization step by step Effect is not only convenient for introducing seal wire, can also realize that minimally invasive expansion skin introduces PICC conduit, not cause secondary injury to skin, create Mouth is small, amount of bleeding is small and easy healing, and local anaesthesia can be carried out before puncture, solves skin injury in the prior art Greatly, the big problem of amount of bleeding reduces complication and Wound healing time, optimizes Wound healing effect, reduces patient's Pain, and simplify operating procedure.

(2) needle handle and the sheath handle are in that the outer shape setting of inversion polygon prism-frustum-shaped more meets people from the front to the back Body ergonomic designs, while the level-one socket is set as inverted taper, and shaggy crescent shape is arranged in conical surface Recess portion is not only held convenient for pinching, and finger can be provided power and more be converted into the power pushed ahead by inclined-plane, carried out blood vessel and worn It is more laborsaving when piercing or send sheath.

(3) due to successfully exiting the puncture needle so that puncturing it is not necessary that the seal wire is imported blood vessel via the needle body When, blood vessel is pressed in the withdraw of the needle, it is possible to reduce amount of bleeding.

(4) inclined-plane at the level-one socket and the setting of the taper nest of second level receptacle interior front end and open rearward end edge The effect convenient for seal wire insertion is played in setting.

(5) cooperated by the spline on the spline and the level-one socket on the plug connector, limit the puncture needle Expand sheath with the level-one to relatively rotate, is conducive to puncture and once expand skin.

(6) connecting column and the socket adaptable by setting, using between the connecting column and the socket Frictional force limit the importings sheath and the second level when sending sheath and expand sheath and relatively move, be conducive to send sheath and secondary expansion Skin.

(7) further the connecting column and the second level socket are set as being threadedly engaged, reinforce limiting the importing sheath Expand sheath relative movement with the second level, when needing to exit the importing sheath, rotates outward the importing sheath, the importing sheath Sheath can be expanded with the second level and separate and be gradually backed out blood vessel, sent sheath process more convenient, also do not make to exit the importing sheath Complicated for operationization.

(8) further cooperated using spline and spline and reinforce limiting the importing sheath and opposite turn of second level expansion sheath It is dynamic, reinforce limiting the importing sheath using spherical elasticity grain and positive stop strip and the second level expands the opposite back-and-forth motion of sheath, is needing When exiting the importing sheath, finger imposes power backward to the sheath handle, the elastic grain can be pulled out the positive stop strip, It send sheath process more convenient, does not also make to exit complicated for operationization for importing sheath.

(9) by the way that lug is arranged on the second level socket, one-handed performance may be implemented and complete to exit the importing sheath Process, the another hand of liberation, which can synchronize, carries out other operations such as pressing blood vessel, though a slight setting, for doctor It is huge raising for treatment process and medical technology.

(10) it by the way that the medical grade rubber ring is arranged, reduces and disposably withdraws from the difficulty for importing sheath and the seal wire Degree, simplifies operating procedure, and shortening reduces patient suffering to reduce amount of bleeding in the time of wound operation.

(11) the integrally formed terrace with edge in the needle handle rear end or rotary table setting, allow to carry out more laborsaving when the withdraw of the needle, are not easy It skids.

Detailed description of the invention

Fig. 1 sets the process for using figure in pipe step in PICC for each component of the utility model；

Fig. 2 is the utility model structure diagram；

Fig. 3 is puncture needle component structural schematic diagram；

Fig. 4 is the structural schematic diagram that puncture needle and level-one expand sheath；

Fig. 5 is to expand skin device assembly structural schematic diagram；

Fig. 6 is the structural schematic diagram for importing sheath and second level expansion sheath；

Fig. 7 is part A and part B enlarged drawing in Fig. 3；

Fig. 8 is C portion and D magnified partial view in Fig. 4；

Fig. 9 is E magnified partial view in Fig. 5；

Figure 10 is the part F and G magnified partial view in Fig. 6；

Wherein 1- puncture needle；11- needle handle；12- needle body；13- plug connector；2- level-one expands sheath；21- level-one socket；22- mono- Grade sheath；3- seal wire；4- imports sheath；41- sheath handle；42- imports sheath；43- connecting column；5- second level expands sheath；51- second level is inserted Mouthful；52- second level sheath.

Specific embodiment

The utility model is described in further detail below with reference to embodiment, but the embodiments of the present invention is not It is limited to this.

In the description of the present invention, it should be understood that term " front end ", " rear end ", " from the front to the back " etc. indicate Orientation or positional relationship be, after one end far from blood vessel is to be before being with the one end for approaching blood vessel to enter the direction of blood vessel Before, exit blood vessel direction be after, the orientation or positional relationships of the instructions such as term " outside ", " inside ", " inner wall " is based on attached Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this The limitation of utility model.

It is worth noting that:

The puncture needle component, the seal wire 3, specification, the length for expanding skin device assembly are not done in the utility model Limitation, under normal circumstances, the puncture needle component, the length expanded in skin device assembly insertion blood vessel are 60mm~70mm, institute Stating the length in 3 indwelling blood vessel of seal wire is 100mm~150mm.It is convenient to be easy to use, it is preferably provided with: the rule of the puncture needle 1 Lattice are 20G~22G, and length is 100mm~150mm；The specification that the level-one expands sheath 2 is 4Fr~4.5Fr, length 80mm ~120mm；3 diameter of seal wire is 0.7mm~0.9mm, and length is 300mm~500mm；4 specification of importing sheath is 4.5Fr ~5Fr, front end are decreased to expand with the mating level-one that the diameter specifications of sheath 2 are equal, and length is 100mm~150mm；Described two It is 5Fr~6Fr that grade, which expands 5 specification of sheath, and length is 80mm~120mm.

Unit G, Fr of expression specification in medical device is illustrated at this.Fr (French) is the unit of conduit, is The unit of measurement & characterization perimeter, such as the conduit of 3Fr, week a length of 3mm, therefore it is a diameter ofTo pair of visible 1Fr The diameter answered isG (Gauge) is the unit that puncture needle commonly characterizes thickness, and wherein G value is (i.e. before unit G Digital value) more large needle is thinner, for the puncture needle of 20G~30G, diameter millimeter can be according to formulaIt calculates； It is less than or equal to the puncture needle of 19G for G value, diameter millimeter can be according to formulaIt calculates.

Level-one described in the present embodiment expands sheath 2, imports sheath 4, second level expansion 5 material of sheath as ethylene-tetrafluoroethylene copolymerization One of polyolefin such as object, polyethylene, polypropylene are a variety of.It needs since the importing sheath 4, second level expand sheath 5 without hard Blood vessel is inserted into the case of matter guiding thing, tubular article toughness made of the ethylene-tetrafluoroethylene copolymer of bismuth oxide-containing more preferably, bending resistance It is good to roll over effect, preferably, second level expansion 5 outer surface of sheath coating dipotassium base acrylamide-Glycidyl methacrylate is sweet Grease block copolymer, the material have lubricating action.

Embodiment 1:

In conjunction with shown in attached drawing 2, a kind of PICC sets the minimally invasive expansion sheath group of pipe, including puncture needle component and expands skin device assembly, and Surface is coated with the seal wire 3 of silicon coating, and the puncture needle component includes puncture needle 1 and is socketed in external tubular level-one and expands skin Sheath 2,1 front end of puncture needle stretch out the level-one and expand sheath 2, and the level-one expands 2 front end rounding of sheath；The expansion skin device assembly In the tubular that front end reduces, including the importing sheath 4 with toughness and it is socketed in the second level expansion sheath 5 imported outside sheath 4, it is described to lead Enter 4 front end rounding of sheath and stretch out the second level and expand sheath 5, the second level expands 5 front end rounding of sheath；3 diameter of seal wire is less than The level-one expands sheath 2 and the internal diameter for importing sheath 4, and the level-one expands 2 outer diameter of sheath and is equal to the outer of importing 4 front end of sheath Diameter.

Principle of the present embodiment is further described at this:

The present embodiment expands skin by the way of once expanding skin and secondary expansion skin step by step, and the effect for expanding skin, setting pipe can be realized, Mode without expanding dermatotome notch expands wound, avoids increasing amount of bleeding, extends Wound healing time and effect, reduces patient Pain.

In the present embodiment, the puncture needle 1 is 21G, 115mm, and it is 4.5Fr, 80mm that the level-one, which expands sheath 2, described to wear It is 5mm that 1 front end of pricker, which stretches out the level-one to expand the length of sheath 2, and the total length of the puncture needle component is 115mm；It is described to lead Silk 3 is 0.87mm, 300mm；The importing sheath 4 is 4.5Fr, 120mm, and it is 5Fr, 80mm, the importing that the second level, which expands sheath 5, It is 10mm that 4 front end of sheath, which stretches out the second level to expand the length of sheath 5, and the total length for expanding skin device assembly is 120mm.

In conjunction with shown in attached drawing 1, it is as follows that PICC sets pipe operating procedure:

Step I, point of puncture local anaesthesia carry out venipuncture using puncture needle component under Vascular Ultrasonography guidance, will wear Lancet unit is fed together blood vessel, in this step, punctures and the primary skin that expands is completed jointly, the overall length that the puncture needle component is submerged About 70mm is spent, the puncture needle 1 submerges length about 70mm, and the level-one expands sheath 2 and submerges length about 65mm；

Step II, the fixed level-one of left hand expand sheath 2 and press point of puncture, and the right hand exits the puncture needle 1；

Step III, seal wire 3 is expanded into sheath 2 by the level-one and is sent into blood vessel, the seal wire 3 is placed in length about 15mm；

Step IV, seal wire 3 described in fixed indwelling, presses point of puncture, withdraws from the level-one and expands sheath 2；

Step V, skin device assembly will be expanded to be placed on the seal wire 3, follows the rotation of seal wire 3 to expand skin and enter, and is advanced into It is intravascular, in this step, sheath and secondary expansion skin is sent to complete jointly, the total length about 70mm for expanding skin device assembly and submerging is described It imports sheath 4 and submerges length about 70mm, the second level expands sheath 5 and submerges length about 60mm；

Step VI, indwelling and the fixed second level expand sheath 5, and pressing point of puncture withdraws from the importing sheath 4 and the seal wire 3；

Step VII, PICC conduit is expanded into sheath 5 by the second level and is sent into blood vessel.

Embodiment 2:

On the basis of embodiment 1, in conjunction with shown in attached drawing 3 and 4, the puncture needle 1 includes the needle handle being fixedly connected 11 and the needle body 12, the smooth closing imperforation of the needle body 12, the needle handle 11 is from the front to the back in being inverted polygon prism-frustum-shaped.

Elaboration for the implementation principle that the present embodiment is further improved:

The puncture needle 1 is 115mm long, wherein the needle handle 11 is 30mm long, the needle body 12 is 85mm long；The level-one expands skin Sheath 2 is 80mm long, and the level-one expansion sheath 2 is bonded just with the needle body 12 and 12 front end of the needle body stretches out the level-one and expands skin The length of sheath 2 is 5mm.

Needle handle 11 first is stated into finger gripping residence, carries out venipuncture using puncture needle component under Vascular Ultrasonography guidance, directly Until the puncture needle component submerges length about 70mm；The level-one is fixed again to expand sheath 2 and press point of puncture, is held with the right hand It states needle handle 11 and exits the puncture needle 1 in residence.

Embodiment 3:

On the basis of embodiment 2, in conjunction with shown in attached drawing 3,4,7,8, it includes one be fixedly connected that the level-one, which expands sheath 2, Grade socket 21 and level-one sheath 22 is in inverted taper outside the level-one socket 21, symmetrically sets in the taper from the front to the back It is equipped with shaggy crescent shape recess portion, the tapered nest of 21 interior forward end of level-one socket, Internal back end is equipped with spline, after End opening edge is in inclined-plane；11 front end of needle handle is described to insert integrally formed with the plug connector 13 for wrapping the needle body 12 Fitting 13 is in a circular table shape and there is spline on surface, and the spline and spline are adapted.

Elaboration for the implementation principle that the present embodiment is further improved:

22 length of level-one sheath is 65mm, and 21 length of level-one socket is 15mm；The puncture needle 1 is 115mm long, Wherein the needle body 12 is 85mm long, and the needle handle 11 is 30mm long, and the plug connector 13 is adapted with the level-one socket 21, therefore The pluggable length of the needle body 12 is 70mm.

Needle handle 11 first is stated into finger gripping residence, carries out venipuncture using puncture needle component under Vascular Ultrasonography guidance, directly It is all submerged to the level-one sheath 22；The level-one is fixed again to expand sheath 2 and press point of puncture, holds the needle handle with the right hand 11 exit the puncture needle 1.

Seal wire 3 is passed through into the level-one socket 21, the level-one sheath 22 feeding blood vessel, the seal wire 3 is placed in length about 15mm。

Seal wire 3 described in fixed indwelling, and point of puncture is pressed, it holds the level-one socket 21 and extracts the level-one sheath 22, It withdraws from the level-one and expands sheath 2.

In addition, inclined-plane can incite somebody to action when needing level-one expansion sheath being pushed further into blood vessel when puncturing or after puncturing Finger provides power and is more converted into the power pushed ahead, and preferably can carry out puncture working using the strength that finger provides.

Embodiment 4:

On the basis of embodiment 1 or 2 or 3, in conjunction with shown in attached Figures 5 and 6, the importing sheath 4 includes importing 42 He of sheath From the front to the back in the sheath handle 41 for being inverted polygon prism-frustum-shaped, 42 rear end of importing sheath is through the sheath handle 41 and fixed company It connects, 42 material of importing sheath is bismuth oxide.

Elaboration for the implementation principle that the present embodiment is further improved:

The long 120mm of the importing sheath 4, wherein the sheath handle 41 is 30mm long, the long 90mm of the importing sheath 42；The second level It is 80mm long to expand sheath 5, the second level expansion sheath 5 is bonded just with the importing sheath 42 and 42 front end of importing sheath is stretched out The length that the second level expands sheath 5 is 10mm.

Sheath handle 41 is stated with finger gripping residence, skin device assembly will be expanded and be placed on the seal wire 3, and the seal wire 3 is followed to rotate Expand skin to enter, be advanced into the total length about 70mm intravascular, the expansion skin device assembly is submerged, the importing sheath 4 submerges length about 70mm, the second level expand sheath 5 and submerge length about 60mm.

Point of puncture is pressed, and the fixed second level expands sheath 5, holds the sheath handle 41 and extracts the importing sheath 42, removes The importing sheath 4 and the seal wire 3 out.

Embodiment 5:

On the basis of embodiment 4, in conjunction with shown in attached drawing 5,6, it includes that the second level being fixedly connected is inserted that the second level, which expands sheath 5, Mouth 51 and second level sheath 52, the tapered nest of 51 interior forward end of second level socket, open rearward end edge are in inclined-plane；The sheath handle 41 Front end, which is additionally provided with, wraps up the connecting column 43 for importing sheath 42, and the connecting column 43 is adapted with the socket 51；It is described 52 material of second level sheath is bismuth oxide, and surface is total coated with dipotassium base acrylamide-glycidyl methacrylate block Polymers.

Elaboration for the implementation principle that the present embodiment is further improved:

52 length of second level sheath is 65mm, and 21 length of second level socket is 15mm；The long 120mm of the importing sheath 4, Wherein the sheath handle 41 is 30mm long, and the long 90mm of the importing sheath 42, the connecting column 43 is adapted with the second level socket 51, Therefore the pluggable length of sheath 42 that imports is 75mm.

Sheath handle 41 is stated with finger gripping residence, skin device assembly will be expanded and be placed on the seal wire 3, and the seal wire 3 is followed to rotate Expand skin to enter, be advanced into intravascular, expands until sheath 5 all submerges to the second level, the expansion skin device assembly is submerged at this time Total length about 75mm, the importing sheath 4 submerge length about 75mm, and the second level expands sheath 5 and submerges length about 65mm.

Point of puncture is pressed, and the fixed second level expands sheath 5, holds the sheath handle 41, by the connecting column 43 from described It is separated on socket 51, and extracts the importing sheath 42, withdraw from the importing sheath 4 and the seal wire 3.

Embodiment 6:

On the basis of embodiment 5, in conjunction with shown in attached drawing 9,10, further, the connecting column 43 is threaded post, described 51 inner wall of second level socket is provided with screw thread and the threaded post cooperates.

Elaboration for the implementation principle that the present embodiment is further improved:

Point of puncture is pressed, and the fixed second level expands sheath 5, holds the sheath handle 41 and rotates outward the importing sheath 4, directly It is separated to the connecting column 43 with the second level socket 51, holds the sheath handle 41 and extract the importing sheath 42 backward, withdraw from Import sheath 4 and the seal wire 3.

Embodiment 7:

On the basis of embodiment 5, further, 51 rear end of socket is provided with spline, after the connecting column 43 End is provided with adaptable spline, and spherical elastic grain is also symmetrically arranged on the connecting column 43, and the elasticity grain is located at institute Spline front end is stated, the positive stop strip for being located exactly at the elastic grain rear end is provided in the second level socket 51.

Elaboration for the implementation principle that the present embodiment is further improved:

The elasticity grain is one of polyolefin such as ethylene-tetrafluoroethylene polymer, polyethylene, polypropylene or a variety of systems At high polymer elastic spherical particle；The positive stop strip material is identical as 51 material of socket, is hard high molecular material system At.

Point of puncture is pressed, and the fixed second level expands sheath 5, holds the sheath handle 41 and pulls out, by the elastic grain The positive stop strip rear is drawn, the limitation for importing sheath 4 and the opposite back-and-forth motion of second level expansion sheath 5 is released, holds institute It states sheath handle 41 and extracts the importing sheath 42 backward, withdraw from the importing sheath 4 and the seal wire 3.

Embodiment 8:

On the basis of embodiment 7, further, integrally formed with symmetrical lug outside the second level socket 51.

Point of puncture is pressed, and the fixed second level expands sheath 5, thumb and index finger gently resist or pinch the second level and expand skin Lug on sheath 5, excess-three, which refers to, pulls back the importing sheath 4 with palm cooperation, and the elastic grain is drawn to the positive stop strip Rear releases the limitation for importing sheath 4 and the opposite back-and-forth motion of second level expansion sheath 5, decontrols the lug, hold described Sheath handle 41 extracts the importing sheath 42 backward, withdraws from the importing sheath 4 and the seal wire 3.

Embodiment 9:

On the basis of any one embodiment of embodiment 5-8, further, 41 rear end of importing sheath is fixedly connected There is medical grade rubber ring.

Point of puncture is pressed, and the fixed second level expands sheath 5, holds the sheath handle 41 and pulls out, by the elastic grain The positive stop strip rear is drawn, the limitation for importing sheath 4 and the opposite back-and-forth motion of second level expansion sheath 5 is released, pinches institute Medical grade rubber ring is stated, the seal wire 3 and the importing sheath 42 are pinched simultaneously at this time, can be disposably by 3 He of seal wire The importing sheath 4 is withdrawn from backward simultaneously.

Embodiment 10:

On the basis of embodiment 9, further, 11 rear end of needle handle also integrally formed with being gradually increased from the front to the back Terrace with edge or rotary table.

In the withdraw of the needle, opposite puncture process, finger is to the conjunction that the power of the puncture needle 1 is to major axes orientation and rear end Power, if the component for rear end of advocating required for puncture, the terrace with edge or rotary table inclined-plane of 11 rear end of needle handle can give finger The bigger equilibrant force towards front end is provided, thus in the case where the component of 1 rear end of puncture needle is constant, finger is to institute It states the resultant force that puncture needle 1 is applied to reduce, the outer shape setting of the needle handle 11 more meets ergonomic designs, and the withdraw of the needle is more It is laborsaving and be not easy to skid.

The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within Within the protection scope of the utility model.

Claims (10)

1. a kind of PICC sets the minimally invasive expansion sheath group of pipe, including puncture needle component and expansion skin device assembly and surface are coated with silicon coating Seal wire (3), which is characterized in that the puncture needle component includes puncture needle (1) and is socketed in external tubular level-one and expands skin Sheath (2), puncture needle (1) front end stretch out the level-one and expand sheath (2), and the level-one expands sheath (2) front end rounding；The expansion Skin device assembly is in the tubular that front end reduces, and including the importing sheath (4) with toughness and is socketed in the external second level expansion of importing sheath (4) Sheath (5), importing sheath (4) the front end rounding simultaneously stretch out second level expansion sheath (5), and the second level expands sheath (5) front end and falls Circle；The level-one that seal wire (3) diameter is less than expands sheath (2) and the internal diameter for importing sheath (4), and the level-one expands sheath (2) outer diameter is equal to the outer diameter for importing sheath (4) front end.

2. a kind of PICC according to claim 1 sets the minimally invasive expansion sheath group of pipe, which is characterized in that puncture needle (1) packet The needle handle (11) and needle body (12) being fixedly connected are included, the needle handle (11) is from the front to the back in inversion polygon prism-frustum-shaped.

3. a kind of PICC according to claim 2 sets the minimally invasive expansion sheath group of pipe, which is characterized in that the level-one expands sheath It (2) include the level-one socket (21) and level-one sheath (22) being fixedly connected, the level-one socket (21) is external from the front to the back in The taper set is symmetrically arranged with shaggy crescent shape recess portion in the taper, and level-one socket (21) interior forward end is in Taper nest, Internal back end are equipped with spline, and open rearward end edge is in inclined-plane；Needle handle (11) front end is solid integrally formed with package The plug connector (13) of the fixed needle body (12), the plug connector (13) is in a circular table shape and there are spline, the spline and spline in surface Slot is adapted.

4. a kind of PICC according to claim 2 or 3 sets the minimally invasive expansion sheath group of pipe, which is characterized in that the importing sheath (4) Including importing sheath (42) and from the front to the back in the sheath handle (41) for being inverted polygon prism-frustum-shaped, importing sheath (42) rear end is passed through It wears the sheath handle (41) and is fixedly connected, importing sheath (42) material is bismuth oxide.

5. a kind of PICC according to claim 4 sets the minimally invasive expansion sheath group of pipe, which is characterized in that the second level expands sheath It (5) include the second level socket (51) and second level sheath (52) being fixedly connected, the tapered nest of second level socket (51) interior forward end, Open rearward end edge is in inclined-plane；Sheath handle (41) front end, which is additionally provided with, wraps up the connecting column (43) for importing sheath (42), The connecting column (43) and the socket (51) are adapted；Second level sheath (52) material is bismuth oxide, and surface is coated with Dipotassium base acrylamide-glycidyl methacrylate block copolymer.

6. a kind of PICC according to claim 5 sets the minimally invasive expansion sheath group of pipe, which is characterized in that the connecting column (43) is Threaded post, second level socket (51) inner wall is provided with screw thread and the threaded post cooperates.

7. a kind of PICC according to claim 5 sets the minimally invasive expansion sheath group of pipe, which is characterized in that socket (51) rear end It is provided with spline, connecting column (43) rear end is provided with adaptable spline, is also symmetrical arranged on the connecting column (43) There is spherical elastic grain, the elasticity grain is located at the spline front end, is provided in the second level socket (51) and is located exactly at institute State the positive stop strip of elastic grain rear end.

8. a kind of PICC according to claim 7 sets the minimally invasive expansion sheath group of pipe, which is characterized in that the second level socket (51) Outside is integrally formed with symmetrical lug.

9. a kind of PICC according to claim 5-8 any one sets the minimally invasive expansion sheath group of pipe, which is characterized in that described to lead Enter sheath (42) rear end and is fixedly connected with medical grade rubber ring.

10. a kind of PICC according to claim 9 sets the minimally invasive expansion sheath group of pipe, which is characterized in that after the needle handle (11) End is also integrally formed with the terrace with edge or rotary table being gradually increased from the front to the back.