CN211096505U - Arteriovenous internal fistula puncture needle for blood purification - Google Patents

Abstract

The utility model relates to a blood purifies uses internal arteriovenous fistula pjncture needle belongs to blood purification equipment's technical field, has solved among the prior art and has stayed the position removal that the needle kept somewhere or when the adjustment kept somewhere needle blood sampling angle, and the vascular technical problem is harmd easily to the metal needle. This blood purifies keeps somewhere needle and puncture mechanism with arteriovenous internal fistula pjncture needle includes that the fluororesin sleeve pipe keeps somewhere the needle including keeping somewhere the fluororesin sleeve pipe, and in patient's blood purification process, it keeps somewhere the fluororesin sleeve pipe and keeps somewhere in the patient internal. The puncture mechanism is used for puncture of the internal arteriovenous fistula for blood purification of a patient, and the puncture mechanism is lined on the fluororesin sleeve indwelling needle so as to puncture the arteriovenous through the puncture mechanism and enable the fluororesin sleeve indwelling needle to enter the arteriovenous. Only a fluororesin sleeve is left in the blood vessel, and no metal needle is left. Because the indwelling fluororesin sleeve is soft, the arm can be moved or the position of the indwelling fluororesin sleeve and the blood sampling angle can be adjusted in the hemodialysis process so as to obtain larger blood sampling amount.

Description

Arteriovenous internal fistula puncture needle for blood purification

Technical Field

The utility model relates to a blood purification equipment technical field especially relates to a blood purifies uses internal arteriovenous fistula pjncture needle.

Background

Since the first application of arteriovenous fistulas to hemodialysis in 1962, arteriovenous fistulas have been the most desirable permanent route for long-term use in patients with end-stage renal failure. Arteriovenous fistulas can provide the required blood flow for hemodialysis treatment, however, the reasons for influencing the use time of arteriovenous fistulas are many, the most important reason is the damage of frequent puncture to blood vessels. Therefore, puncture techniques and protection of the internal fistula vessels are of critical importance.

Most of patients with blood purification at present use traditional dialysis fistula needles, however, the traditional dialysis fistula needles all adopt metal needles, and the metal needles have at least the following defects: (1) the metal needle is left in the whole blood sampling process, so that the arm or leg and foot of a patient can easily damage blood vessels when moving; (2) after the traditional dialysis fistula needle is adopted for puncture, when the blood sampling is not good, the metal needle cannot be adjusted, otherwise, the inner wall of the blood vessel is damaged, and the puncture can be carried out again; (3) metal needles are not suitable for some patients allergic to metal; (4) after the blood purification of the patient is finished, when the medical staff draws the needle point away from the arm blood vessel of the patient, pressure must be applied to stop bleeding immediately, and the fingers applying pressure face huge risks of acupuncture and blood infectious diseases; (5) the outer diameter of the metal needle is larger, and the puncture wound caused by the metal needle is larger.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide a blood purifies uses internal arteriovenous fistula pjncture needle, when having solved the position that the needle of keeping somewhere kept somewhere among the prior art and having removed or the adjustment blood sampling angle of keeping somewhere the needle, the vascular technical problem of easy damage of metal needle. The technical effects that the preferred technical scheme of the utility model can produce are explained in detail in the following.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model discloses a blood purifies uses internal arteriovenous fistula pjncture needle, keep somewhere needle and puncture mechanism including the fluororesin sleeve pipe, wherein, the fluororesin sleeve pipe is kept somewhere the needle and is kept somewhere the fluororesin sleeve pipe including keeping somewhere the fluororesin sleeve pipe, in patient blood purification in-process, keeps somewhere the fluororesin sleeve pipe and keeps somewhere in the patient internally. The puncture mechanism is used for puncture of the internal arteriovenous fistula for blood purification of a patient, and the puncture mechanism is lined on the fluororesin sleeve indwelling needle so as to puncture the arteriovenous through the puncture mechanism and enable the fluororesin sleeve indwelling needle to enter the arteriovenous.

In a preferred embodiment, the indwelling fluororesin sleeve has a conical structure, and a plurality of sleeve distal end through holes are formed in the distal end of the indwelling fluororesin sleeve.

As a preferred technical proposal, the indwelling fluororesin sleeve has a 3-7 degree cone structure. Preferably, the indwelling fluororesin sleeve is a 5 ° cone structure.

As a preferable technical scheme, the fluororesin cannula indwelling needle further comprises an indwelling fluororesin cannula fixing base, a blood connecting pipeline and a blood connecting pipeline fixing structure, wherein the indwelling fluororesin cannula is of a hollow tubular structure, one end of the indwelling fluororesin cannula is used for entering arteriovenous and communicating with arteriovenous vessels of a patient, and the other end of the indwelling fluororesin cannula is fixed on the indwelling fluororesin cannula fixing base; the other end of the remaining fluororesin sleeve fixing base is communicated with the blood connecting pipeline and the blood connecting pipeline fixing structure in sequence, and a threaded interface is arranged at the port of the blood connecting pipeline fixing structure.

As a preferred technical scheme, the fluororesin sleeve indwelling needle further comprises a hemostatic clamp which is positioned on the blood connecting pipeline and used for clamping and plugging the blood connecting pipeline.

As an optimal technical scheme, the hemostatic clamp comprises a body, a clamping groove, a clamping buckle tip, a lower tip structure and an upper tip structure, wherein the clamping groove and the clamping buckle tip are respectively positioned at two ends of the body, and the clamping groove and the clamping buckle tip are matched so that the clamping buckle tip can be clamped and embedded in the clamping groove. The lower tip structure and the upper tip structure are located between the clamping groove and the buckle tip, the lower tip structure and the upper tip structure are located on the same side of the body, and when the buckle tip is clamped in the clamping groove, the lower tip structure and the upper tip structure are close to each other and/or pressed.

As a preferred technical scheme, the needle is kept somewhere to fluororesin sleeve pipe still includes the sealed cap of blood connecting line, and the sealed cap of blood connecting line includes sealed cap seal structure and sealed cap screw thread handle, sealed cap seal structure and sealed cap screw thread handle fixed connection, and sealed cap seal structure is a fixed column to the diameter of fixed column and the internal diameter phase-match of blood connecting line fixed knot construct, it is sealed to keep somewhere the needle with the fluororesin sleeve pipe through the fixed column grafting in blood connecting line fixed knot structure.

As a preferred technical scheme, the puncture mechanism comprises a metal guide puncture needle core, a metal guide puncture needle core fixing base and a metal guide puncture needle core threaded handle, wherein the metal guide puncture needle core is used for the arteriovenous internal fistula puncture of blood purification of a patient, one end of the metal guide puncture needle core is fixed on the metal guide puncture needle core fixing base, and the metal guide puncture needle core threaded handle is further fixed on the metal guide puncture needle core fixing base.

As a preferred technical scheme, the arteriovenous internal fistula puncture needle for blood purification further comprises a sleeve indwelling needle protective sleeve which is sleeved on an indwelling fluororesin sleeve of a fluororesin sleeve indwelling needle so as to isolate the indwelling fluororesin sleeve from the outside air.

As an optimal technical scheme, the arteriovenous internal fistula puncture needle for blood purification further comprises a sleeve indwelling needle protective sleeve sealing cap, the sleeve indwelling needle protective sleeve sealing cap is matched with the sleeve indwelling needle protective sleeve, and the sleeve indwelling needle protective sleeve sealing cap is connected with the sleeve indwelling needle protective sleeve in a buckling mode and seals the sleeve indwelling needle protective sleeve.

The utility model provides a blood purifies has following beneficial technological effect with arteriovenous internal fistula pjncture needle at least:

blood purification arteriovenous fistula puncture sleeve pipe keep somewhere the needle and carry out blood purification puncture in-process for the patient, puncture mechanism inside lining is kept somewhere on the needle in the fluororesin sleeve pipe, and puncture mechanism with keep somewhere the same arteriovenous that gets into the patient of fluororesin sleeve pipe, then extract puncture mechanism for keep somewhere the fluororesin sleeve pipe and keep somewhere in the human body. The blood vessel is not provided with a metal needle, only the indwelling fluororesin sleeve is used for indwelling, and the indwelling fluororesin sleeve is softer, so that the arm of a patient can be freely moved in the hemodialysis process, and the risk of damaging the blood vessel is reduced to the minimum. When the blood vessel condition of a patient is poor or the blood sampling condition in the hemodialysis process is poor, a better blood sampling amount can be obtained by adjusting the angle and the position of the indwelling fluororesin sleeve, and the injury to the inner wall of the blood vessel is not worried during adjustment, which is different from the traditional puncture needle for dialysis essentially.

On the other hand, only the indwelling fluororesin sleeve is left in the patient body in the blood purification process, and the kidney nursing staff can not be punctured by the sharp needle core when the indwelling fluororesin sleeve is pulled away from the arm of the patient after the blood purification is finished, so that the unexpected needle infection is avoided, and the health of the medical staff is ensured more actively.

Furthermore, the utility model discloses preferred technical scheme can also produce following technological effect:

the utility model discloses preferred technical scheme's keeping somewhere fluororesin sleeve pipe sets up to the cone structure, and keeps somewhere the sheathed tube front end of fluororesin and set up a plurality of sleeve pipe front end through-holes, can effectively obtain better blood volume of taking a sample.

The utility model discloses blood purification for the preferred technical scheme artery and vein internal fistula pjncture needle makes before the blood pipeline is connected to the puncture in-process through setting up blood connecting line hemostatic clamp and keeping somewhere the sealed cap of needle protective sheath, need not hemostatic clamp and live the rubber outer tube of trocar, and then simplifies move vein internal fistula puncture operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a puncture cannula indwelling needle for arteriovenous fistula with blood purification according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view showing the structure of a fluororesin cannula indwelling needle according to a preferred embodiment of the present invention;

FIG. 3 is a schematic structural view of a preferred embodiment of the needle head of the fluororesin cannula indwelling needle of the present invention;

FIG. 4 is a schematic structural view of a preferred embodiment of the seamless package of the fluororesin cannula indwelling needle of the present invention;

FIG. 5 is a schematic structural view of a sealing cap of a blood connection line according to a preferred embodiment of the present invention;

FIG. 6 is a schematic view of the structure of the cannula indwelling needle protecting sheath and the sealing cap according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of a preferred embodiment of the hemostatic clamp for blood connection lines of the present invention;

fig. 8 is a schematic structural view of a puncture mechanism according to a preferred embodiment of the present invention.

In the figure: 1-sleeve indwelling needle protection sleeve; 2-fluororesin sleeve indwelling needle; 3-hemostatic clamp; 4-sealing cap of blood connecting line; 5-a puncture mechanism; 6-sleeve indwelling needle protective sleeve sealing cap; 7-indwelling fluororesin sleeve; 71-sleeve front end through hole; 8-retaining a fluororesin sleeve fixing base; 9-blood connection line; 10-blood connecting line fixing structure; 11-a threaded interface; 12-a metal guided lancet core; 13-a metal guide puncture needle core fixing base; 14-metal guide puncture needle core thread handle; 15-sealing cap sealing structure; 16-sealing cap threaded handle; 17-sleeve indwelling needle protective sleeve front end structure; 18-a middle end structure of a protective sleeve of the cannula indwelling needle; 19-a sleeve indwelling needle protective sleeve rear end structure; 20-sleeve indwelling needle protective sleeve bayonet; 21-bayonet of a sealing cap of a protective sleeve of the cannula indwelling needle; 22-sleeve indwelling needle protective sleeve sealing cap handle; 23-a card slot; 24-a snap tip; 25-lower tip configuration; 26-upper tip configuration; 27-anti-slip thread.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, an arteriovenous internal fistula puncture needle for blood purification comprises a fluororesin cannula indwelling needle 2 and a puncture mechanism 5. Wherein, the fluororesin sleeve indwelling needle 2 comprises an indwelling fluororesin sleeve 7, and the indwelling fluororesin sleeve 7 is indwelling in the body of the patient during the blood purification process of the patient. The puncture mechanism 5 is used for the puncture of the patient blood purification arteriovenous internal fistula, and the puncture mechanism 5 is lined on the fluororesin cannula indwelling needle 2 to puncture the arteriovenous and make the fluororesin cannula indwelling needle 2 enter the arteriovenous by the puncture mechanism 5.

It should be noted that the metal needle core of the existing arteriovenous internal fistula puncture needle is relatively long, and when a kidney medical worker pulls out the metal needle core in the puncture process, the sharp needle tip is very likely to cause accidental injuries and infections of the medical worker and a patient. When the arteriovenous internal fistula puncture needle for blood purification in the preferred embodiment is used, only the indwelling fluororesin sleeve 7 is located in the human body, and the fluororesin sleeve is relatively soft, so that the normal movement of the human body can be met and the blood sampling angle and position of the indwelling fluororesin sleeve 7 can be adjusted to obtain a larger blood sampling amount under the condition of avoiding damaging blood vessels.

On the other hand, since no metal needle is left in the human body, the arteriovenous internal fistula puncture needle for blood purification is particularly suitable for patients with metal allergy, and a kidney nursing staff cannot be punctured by a sharp needle core when the indwelling fluororesin sleeve 7 is pulled away from the arm of the patient after the blood purification is finished, so that unexpected needle puncture infection is avoided, and the health of the nursing staff can be ensured more positively.

Referring to fig. 3, the retained fluororesin sleeve 7 has a conical structure, and a plurality of sleeve distal end through holes 71 are opened at the distal end of the retained fluororesin sleeve 7. Preferably, the leading end of the indwelling fluororesin sleeve 7 is provided with 4 circular small holes, i.e., 4 sleeve leading end through holes 71. More preferably, the cannula distal end through hole 71 is opened at a different position from the distal end of the indwelling fluororesin cannula 7, thereby achieving a different position blood collection.

Preferably, the indwelling fluororesin sleeve 7 is of a conical structure, i.e., the tube diameter of the indwelling fluororesin sleeve 7 gradually increases or/and decreases along the length direction. Preferably, the diameter of the leading end of the indwelling fluororesin sleeve 7 is smaller than the diameter of the leading end of the indwelling fluororesin sleeve 7. The distal end of the indwelling fluororesin sleeve 7 means an end of the indwelling fluororesin sleeve 7 inserted into a blood vessel of the human body.

In the preferred embodiment described above, the blood collection passage at the distal end of the indwelling fluororesin sleeve 7 can be effectively increased by providing a plurality of sleeve distal end through holes 71 at the distal end of the indwelling fluororesin sleeve 7, that is, a plurality of through holes at the side wall of the end of the indwelling fluororesin sleeve 7 that is inserted into the blood vessel of the human body, that is, blood can enter and/or flow into and/or out of the indwelling fluororesin sleeve 7 not only from the end tube hole of the indwelling fluororesin sleeve 7 but also from the through hole at the distal end side wall of the indwelling fluororesin sleeve 7, and a larger amount of blood collection can be obtained. On the other hand, by providing the cannula distal end through hole 71 in the distal end side wall of the indwelling fluororesin cannula 7, the blood collection positions of the indwelling fluororesin cannula 7 are increased, and further, the indwelling fluororesin cannula 7 can simultaneously collect blood from a plurality of positions, and further, the influence of the blood vessel condition on the blood collection amount is reduced.

Preferably, the length of the cannula for retaining the fluororesin cannula 7 is 3 specifications, namely 25mm, 30mm and 35mm, so that the use of different arteriovenous depths of different patients is facilitated. Further preferably, the diameter of the sleeve is 3 specifications, namely 1.6mm, 1.7mm and 1.8mm, so that the requirement of a patient on different blood sampling amounts is facilitated.

In the preferred embodiment, the plurality of through holes are provided at the distal end of the indwelling fluororesin sleeve 7, so that the puncture needle core is smaller and less traumatic to the patient, and bleeding can be more easily stopped after hemodialysis, even when the amount of blood taken is the same.

In a preferred embodiment of the present invention, the indwelling fluororesin sleeve 7 has a 3 to 7 ° conical structure. Preferably, the indwelling fluororesin sleeve 7 is of a 5 ° conical structure. It should be noted that a 5 ° cone structure means that the angle of the half cone angle in the cone structure is 5 °, i.e. half the cone angle of the cone structure is 5 °.

Referring to fig. 2, as a preferred embodiment, the fluororesin cannula indwelling needle 2 further comprises an indwelling fluororesin cannula fixing base 8, a blood connecting line 9, a blood connecting line fixing structure 10, wherein the indwelling fluororesin cannula 7 has a hollow tubular structure, and one end of the indwelling fluororesin cannula 7 is used for entering arteriovenous and communicating with arteriovenous of the patient and the other end is fixed on the indwelling fluororesin cannula fixing base 8. Preferably, the other end of the indwelling fluororesin sleeve fixing base 8 is in communication with the blood connecting line 9 and the blood connecting line fixing structure 10 in sequence, and a port of the blood connecting line fixing structure 10 is provided with a threaded interface 11.

Referring to fig. 4, as a preferred embodiment, the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve mount 8 are fitted to each other so that the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve mount 8 can be seamlessly encapsulated. Specifically, the remaining fluororesin sleeve fixing base 8 is provided with a tapered hole, and the end of the remaining fluororesin sleeve 7 connected to the remaining fluororesin sleeve fixing base 8 is provided with a tapered structure matching with the tapered hole, so that the remaining fluororesin sleeve 7 passes through the tapered hole of the remaining fluororesin sleeve fixing base 8 and is sleeved with the remaining fluororesin sleeve fixing base 8.

As another preferred embodiment, the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve fixing base 8 may be of an integral structure.

In the preferred embodiment, the indwelling fluororesin sleeve 7 and the indwelling fluororesin sleeve fixing base 8 are integrally sealed by seamless molding, which prevents blood coagulation, ensures smooth blood collection, and obtains sufficient blood flow.

Referring to fig. 1, the fluororesin cannula indwelling needle 2 further comprises a hemostatic clip 3, and the hemostatic clip 3 is located on the blood connecting line 9 and used for clamping and blocking the blood connecting line 9. Preferably, the hemostatic clamp 3 is provided as a resilient snap-fit mechanism.

Referring to fig. 7, the hemostatic clamp 3 includes a body, a clamping groove 23 and a snap tip 24, wherein the clamping groove 23 and the snap tip 24 are respectively located at two ends of the body, and the clamping groove 23 and the snap tip 24 are matched to enable the snap tip 24 to be snapped in the clamping groove 23.

Preferably, the hemostatic clamp 3 further includes a lower tip structure 25 and an upper tip structure 26, the lower tip structure 25 and the upper tip structure 26 are located between the clamping groove 23 and the snap tip 24, the lower tip structure 25 and the upper tip structure 26 are located on the same side of the body, and when the snap tip 24 is snapped into the clamping groove 23, the lower tip structure 25 and the upper tip structure 26 are close to and/or press-fitted to each other.

Preferably, the hemostatic clamp 3 is made of medical plastics, such as: polyvinyl chloride, polycarbonate, polyethylene, polypropylene, polytetrafluoroethylene, and the like.

Referring to fig. 7, the hemostatic clip 3 further includes anti-slip threads 27, the anti-slip threads 27 being located on a side of the body distal from the lower tip structure 25 and the upper tip structure 26. When the body makes draw-in groove 23 and the sharp-ended 24 calliper of buckle closed, anti-skidding screw thread 27 can prevent effectively that finger and/or palm from appearing sliding relatively with the body surface, and then the medical personnel of being convenient for press closed hemostatic clamp 3, reach the purpose that in time airtight blood connecting line 9 prevents that blood from leaking outward.

Preferably, the hemostatic clamp 3 is provided with a through hole, and the blood connecting pipeline 9 passes through the through hole to be connected with the hemostatic clamp 3, so that the hemostatic clamp 3 can be nested on the blood connecting pipeline 9, and the operation of clamping the blood connecting pipeline 9 by the hemostatic clamp 3 can be effectively simplified.

Furthermore, the hemostatic clamp 3 is provided with two through holes for connecting with the blood connecting pipeline 9, one through hole is arranged between the lower tip structure 25 and the upper tip structure 26, and the other through hole is arranged between the upper tip structure 26 and the clamping groove 23, or the other through hole is arranged between the lower tip structure 25 and the clamping buckle tip 24, so that the blood connecting pipeline 9 can be clamped after the lower tip structure 25 and the upper tip structure 26 are pressed, and the purpose of sealing the blood connecting pipeline 9 is achieved.

It should be noted that, in the prior art, before the arteriovenous internal fistula puncture needle is connected with a blood pipeline in the puncture process, a rubber outer tube needs to be clamped by a hemostatic clamp, so that the blood of a patient is prevented from being leaked. Adopt the hemostatic forceps to hold the rubber outer tube and though can reach shutoff rubber outer tube, prevent the purpose that blood leaks outward, however, when adopting the hemostatic forceps to hold the rubber outer tube, need medical personnel's hemostatic forceps of taking, then carry out the centre gripping hemostasis again, complex operation is unfavorable for quick centre gripping hemostasis. The arrangement of the hemostatic clamp 3 in the preferred embodiment simplifies the operation of clamping the closed blood connection pipeline 9 into pressing, and can clamp the closed blood connection pipeline 9 quickly and effectively.

Referring to fig. 1 and 5, the fluororesin cannula indwelling needle 2 further comprises a blood connection line sealing cap 4. Preferably, the blood connecting line sealing cap 4 comprises a sealing cap sealing structure 15 and a sealing cap threaded handle 16, and the sealing cap sealing structure 15 is fixedly connected with the sealing cap threaded handle 16.

In the preferred embodiment, the blood connection line 9 carries the hemostatic clamp 3, and when the pre-filled external line is not connected after the puncture process, the blood connection line can be clamped by the hemostatic clamp 3, so that the blood is prevented from extravasating. When other examinations or treatments are needed in the blood purification process of the patient, the blood connection line 9 can be clamped by the hemostatic clamp 3 and/or the blood connection line sealing cap 4 is screwed, so that the patient can be temporarily separated from the blood purification without influencing the subsequent blood purification of the patient.

Further, the blood connecting line fixing structure 10 is provided with a threaded interface 11, and the interface of the blood connecting line fixing structure 10 is sealed by the blood connecting line sealing cap 4, so that the interface is protected from external infection when the blood connecting line fixing structure 10 is not connected with an external line.

As a preferred embodiment of the present invention, the sealing cap sealing structure 15 is a fixing column, and the diameter of the fixing column matches with the inner diameter of the blood connecting line fixing structure 10, so as to insert the fixing column into the blood connecting line fixing structure 10 to seal the fluororesin cannula indwelling needle 2.

In the above preferred embodiment, the blood connecting line sealing cap 4 can be used to seal the blood connecting line 9, and specifically, the sealing cap sealing structure 15 is embedded into the interface of the blood connecting line fixing structure 10 to seal the blood connecting line 9, so as to prevent blood from overflowing along the blood connecting line 9 during the puncturing process.

As a preferred embodiment of the present invention, a hemostatic member is provided in the sealing cap 4 of the blood connection line. Preferably, the hemostatic member is made of an elastic material so that the metal-guided puncture needle core 12 in the puncture mechanism 5 can pass through, but the center needle hole is immediately filled with the elastic material after passing through, thereby preventing blood leakage during hemodialysis. Preferably, the hemostatic member may be made of natural rubber, polyurethane, silicone rubber, or the like.

In a preferred embodiment, the sealing cap sealing structure 15 is provided with an external thread, and the blood connecting line fixing structure 10 is provided with an internal thread matching the external thread of the sealing cap sealing structure 15, so that the sealing cap sealing structure 15 can be screwed with the blood connecting line fixing structure 10.

Referring to fig. 1 and 8, the lancing mechanism 5 includes a metal-guided lancet core 12, a metal-guided lancet core mounting base 13, and a metal-guided lancet core threaded handle 14. Preferably, the metal guide puncture needle core 12 is used for arteriovenous puncture for blood purification of a patient, and one end of the metal guide puncture needle core 12 is fixed on the metal guide puncture needle core fixing base 13. Further preferably, a metal-guided trocar core screw handle 14 is fixed to the metal-guided trocar core fixing base 13.

As a preferred embodiment of the utility model, the inseparable inside lining of metal guide puncture needle core 12 is keeping somewhere fluororesin sleeve pipe 7 in, like this for the patient carry out the blood purification puncture in-process, after metal guide puncture needle core 12 together got into the arteriovenous of patient with keeping somewhere fluororesin sleeve pipe 7, metal guide puncture needle core 12 is removed the back and only remains to keep somewhere fluororesin sleeve pipe 7 and keeps somewhere the patient internal, patient's blood transfusion pipeline is connected to rethread blood connecting line 9 and blood connecting line fixed knot construct 10, and then reach the purpose of blood purification dialysis.

Preferably, the metal introducer needle core 12 includes at least two sizes, one is a blunt metal introducer needle and the other is a sharp metal introducer needle. In arteriovenous internal fistula puncture, the buttonhole puncture has the advantages of less occurrence of blood leakage to patients, high puncture success rate, solving difficult internal fistula puncture, reducing the incidence rate of aneurysm disease complications, prolonging the service life of the internal fistula and the like.

The metal guide puncture needle in the preferred embodiment is very suitable for arteriovenous internal fistula puncture, a subcutaneous tunnel area is created by using sharp metal guide puncture before the buttonhole formation of a patient, and after a well subcutaneous tunnel is created, a blunt metal guide puncture needle is used for buttonhole formation puncture, so that the requirement of kidney medical personnel on arteriovenous internal fistula puncture of the patient is met.

Referring to fig. 1 and 6, the arteriovenous internal fistula puncture needle for blood purification further comprises a cannula indwelling needle protective sheath 1, and the cannula indwelling needle protective sheath 1 is used for being sleeved on an indwelling fluororesin cannula 7 of a fluororesin cannula indwelling needle 2 so as to isolate the indwelling fluororesin cannula 7 from the outside air.

Referring to fig. 1 and 6, the arteriovenous internal fistula puncture needle for blood purification further comprises a sleeve indwelling needle protective sleeve sealing cap 6, the sleeve indwelling needle protective sleeve sealing cap 6 is matched with the sleeve indwelling needle protective sleeve 1, the sleeve indwelling needle protective sleeve sealing cap 6 is connected with the sleeve indwelling needle protective sleeve 1 in a buckling manner, and the sleeve indwelling needle protective sleeve 1 is sealed.

Specifically, in the process of the vascular puncture of a patient, the sleeve indwelling needle protective sleeve 1 and the sleeve indwelling needle protective sleeve sealing cap 6 are disassembled, and the arteriovenous fistula puncture sleeve indwelling needle for blood purification is taken out to perform the vascular puncture.

The arteriovenous fistula cannula indwelling needle for blood purification includes a puncture mechanism 5 and a fluororesin cannula indwelling needle 2, and the puncture mechanism 5 is lined with the fluororesin cannula indwelling needle 2. Then, the puncture mechanism 5 is pulled out, and then the rubber outer tube in the fluororesin cannula indwelling needle 2 is sandwiched by the hemostatic clip 3 on the blood connecting line 9. And finally, pulling out the blood connecting pipeline sealing cap 4 and connecting the blood connecting pipeline.

Referring to fig. 6, in a preferred embodiment, the cannula indwelling needle sheath sealing cap 6 includes a cannula indwelling needle sheath sealing cap bayonet 21 and a cannula indwelling needle sheath sealing cap handle 22.

Referring to fig. 6, in a preferred embodiment, the cannula indwelling needle protecting sheath 1 includes a cannula indwelling needle protecting sheath front end structure 17, a cannula indwelling needle protecting sheath middle end structure 18, a cannula indwelling needle protecting sheath rear end structure 19, and a cannula indwelling needle protecting sheath bayonet 20.

Preferably, the cannula indwelling needle protecting sheath bayonet 21 is matched with the cannula indwelling needle protecting sheath bayonet 20 so that the cannula indwelling needle protecting sheath bayonet 21 and the cannula indwelling needle protecting sheath bayonet 20 can be connected in a sealing manner. Specifically, the fluororesin cannula indwelling needle 2 and the puncture mechanism 5 are enclosed in the cannula indwelling needle sheath 1 through a cannula indwelling needle sheath sealing cap 6.

The sleeve pipe is stayed needle protective sheath 1 and the setting that needle protective sheath sealing cap 6 was kept somewhere to the sleeve pipe, not only keep somewhere needle 2 and piercing mechanism 5 sealed with the fluororesin sleeve pipe before enough on blood purification is tried with sound arteries and veins internal fistula pjncture needle, in case the blood purification is polluted with sound and veins internal fistula pjncture needle before using, and the sleeve pipe is kept somewhere needle protective sheath 1 and sleeve pipe and is kept somewhere needle protective sheath sealing cap 6 and can also be used for placing metal guide puncture needle core 12 after blood purification uses with sound and veins internal fistula pjncture needle, in order to avoid accidental injury patient and medical staff, can prevent simultaneously that naked metal needle core from causing very big pollution to the environment, and cause the difficulty for medical waste special treatment.

The utility model relates to a blood purification of preferred embodiment is with use step as follows of arteriovenous internal fistula pjncture needle:

s1, the sleeve indwelling needle protective sleeve 1 and the sleeve indwelling needle protective sleeve sealing cap 6 are disassembled, and the blood purification arteriovenous fistula puncture sleeve indwelling needle is taken out.

S2, firstly, the blood purification arteriovenous fistula puncture cannula indwelling needle performs blood vessel puncture, and the metal guide puncture needle core 12 is pulled out.

S3, clamping the blood connecting line 9 in the fluororesin cannula indwelling needle 2 by using the hemostatic clamp 3, and pulling out the blood connecting line sealing cap 4.

And S4, connecting an external blood transfusion pipeline.

S5, fixing the fluororesin cannula indwelling needle 2 through the medical adhesive tape.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An arteriovenous internal fistula puncture needle for blood purification is characterized by comprising a fluororesin sleeve indwelling needle (2) and a puncture mechanism (5), wherein,

the fluororesin sleeve indwelling needle (2) comprises an indwelling fluororesin sleeve (7), and the indwelling fluororesin sleeve (7) is indwelling in the body of the patient during the blood purification process of the patient;

the puncture mechanism (5) is used for puncture of the arteriovenous internal fistula for blood purification of a patient, and the puncture mechanism (5) is lined on the fluororesin sleeve indwelling needle (2) so as to puncture the arteriovenous through the puncture mechanism (5) and make the fluororesin sleeve indwelling needle (2) enter the arteriovenous.

2. The arteriovenous internal fistula puncture needle for blood purification according to claim 1, wherein the indwelling fluororesin sleeve (7) has a conical structure, and a plurality of sleeve leading end through holes (71) are opened at the leading end of the indwelling fluororesin sleeve (7).

3. The arteriovenous internal fistula puncture needle for blood purification according to claim 2, wherein the indwelling fluororesin sleeve (7) has a 3 ° to 7 ° cone structure.

4. The arteriovenous internal fistula puncture needle for blood purification according to any one of claims 1 to 3, wherein the fluororesin sleeve indwelling needle (2) further comprises an indwelling fluororesin sleeve fixing base (8), a blood connecting line (9), a blood connecting line fixing structure (10), wherein,

the indwelling fluororesin sleeve (7) is of a hollow tubular structure, one end of the indwelling fluororesin sleeve (7) is used for entering arteriovenous and communicating with arteriovenous of a patient, and the other end is fixed on the indwelling fluororesin sleeve fixing base (8);

keep somewhere the other end of fluororesin sleeve pipe unable adjustment base (8) in proper order with blood connecting line (9) with blood connecting line fixed knot constructs (10) intercommunication, and there is hickey (11) in the port department of blood connecting line fixed knot constructs (10).

5. The arteriovenous internal fistula puncture needle for blood purification according to claim 4, wherein the fluororesin cannula indwelling needle (2) further comprises a hemostatic clip (3), and the hemostatic clip (3) is provided on the blood connecting line (9) for holding and blocking the blood connecting line (9).

6. The arteriovenous internal fistula puncture needle for blood purification according to claim 5, wherein the hemostatic clip (3) comprises a body, a notch (23), a snap tip (24), a lower tip structure (25) and an upper tip structure (26), wherein,

the clamping groove (23) and the buckle tip (24) are respectively positioned at two ends of the body, and the clamping groove (23) is matched with the buckle tip (24) so that the buckle tip (24) can be clamped in the clamping groove (23);

the lower tip structure (25) and the upper tip structure (26) are located between the clamping groove (23) and the clamping tip (24), the lower tip structure (25) and the upper tip structure (26) are located on the same side of the body, and when the clamping tip (24) is clamped in the clamping groove (23), the lower tip structure (25) and the upper tip structure (26) are close to each other and/or pressed.

7. The arteriovenous internal fistula puncture needle for blood purification according to claim 4, wherein the fluororesin cannula indwelling needle (2) further comprises a blood connection line sealing cap (4), the blood connection line sealing cap (4) comprises a sealing cap sealing structure (15) and a sealing cap threaded handle (16),

the sealing structure (15) of the sealing cap is fixedly connected with the threaded handle (16) of the sealing cap,

the sealing cap sealing structure (15) is a fixing column, the diameter of the fixing column is matched with the inner diameter of the blood connecting pipeline fixing structure (10), and the fluororesin cannula indwelling needle (2) is sealed by inserting the fixing column into the blood connecting pipeline fixing structure (10).

8. The arteriovenous internal fistula puncture needle for blood purification according to claim 1, wherein the puncture mechanism (5) comprises a metal-guided puncture needle core (12), a metal-guided puncture needle core fixing base (13), and a metal-guided puncture needle core screw handle (14), wherein,

the metal guide puncture needle core (12) is used for the puncture of arteriovenous internal fistula for purifying blood of a patient, one end of the metal guide puncture needle core (12) is fixed on the metal guide puncture needle core fixing base (13),

the metal guide puncture needle core thread handle (14) is also fixed on the metal guide puncture needle core fixing base (13).

9. The arteriovenous internal fistula puncture needle for blood purification according to claim 1, further comprising a cannula-indwelling needle protective sheath (1), the cannula-indwelling needle protective sheath (1) being adapted to be fitted over an indwelling fluororesin cannula (7) of the fluororesin cannula-indwelling needle (2) to isolate the indwelling fluororesin cannula (7) from the outside air.

10. The arteriovenous internal fistula puncture needle for blood purification according to claim 9, further comprising a cannula indwelling needle protective sheath sealing cap (6), wherein the cannula indwelling needle protective sheath sealing cap (6) is matched with the cannula indwelling needle protective sheath (1), and the cannula indwelling needle protective sheath sealing cap (6) is in snap-fit connection with the cannula indwelling needle protective sheath (1) and seals the cannula indwelling needle protective sheath (1).

Images