CN213432140U - Puncture system of hemodialysis catheter - Google Patents

Abstract

The utility model discloses a puncture system of hemodialysis pipe, including the pipe, it includes: the catheter comprises a catheter body, a catheter body and a catheter, wherein the catheter body extends along the left-right direction and is provided with an inner cavity, the inner cavity is at least divided into a vein cavity and an artery cavity which extend along the axial direction of the catheter body, the right end of the catheter body is of a bifurcation structure and comprises a vein tip and an artery tip, the vein tip is communicated with the vein cavity, and the artery tip is communicated with the artery cavity; a venous extension tube, one end of which is communicated with the venous cavity; an arterial extension tube, one end of which is communicated with the arterial cavity; the locking guide wire can freely pass through the artery extension tube, the artery cavity and the artery tip, and comprises a hook arranged at the right end of the locking guide wire, and the hook is hooked at the right end of the vein tip; the sheath can be torn, and it has the hollow sheath pipe of inner chamber, and the internal diameter of sheath pipe matches with the external diameter of body. The utility model discloses utilize the locking seal wire to realize that vein pointed end and the most advanced laminating of artery are locked and are separated the unblock surely, supplementary pipe that is bifurcation structure punctures and puts a tub operation, and is easy and simple to handle.

Description

Puncture system of hemodialysis catheter

Technical Field

The utility model relates to the field of medical equipment, in particular to puncture system of hemodialysis pipe.

Background

The hemodialysis catheter is an intravascular catheter for dialysis treatment, can be connected with an extracorporeal circulation blood loop, a hemodialysis machine and a hemodialyzer, filters impurities in blood by utilizing the molecular diffusion effect of the dialyzer, regulates ion balance, finally enters a venous end of the hemodialysis catheter through a venous pipeline of the blood loop, and returns to a human body to form circulation. When a hemodialysis catheter is undergoing a dialysis treatment, if blood is discharged from the venous lumen, it re-enters the extracorporeal blood circuit from the arterial end without entering the body for circulation, a phenomenon known as recirculation. The recirculation rate is an evaluation index of the dialysis treatment efficiency, and the lower the recirculation rate is, the better the dialysis treatment effect is, and otherwise, the worse the dialysis efficiency is.

Existing hemodialysis catheters have a double-tipped catheter that employs a bifurcated structure so that it can direct different flows, thereby reducing recirculation of blood. The method is characterized in that a tearable sheath is inserted into a blood vessel, the distal end part of the double-tip catheter is fed into the tearable sheath to realize the alignment of the double tips, the tearable sheath is pulled out while being stripped, and the distal end part of the double-tip catheter returns to a non-stress shape in a scissor-like movement mode under the action of elastic stress to finish the catheterization. Wherein, because the distal part of the double-tip catheter is of a forked structure, the double-tip catheter is difficult to align into a sheath tube of a tearable sheath, and when the double-tip catheter slides in the sheath tube, the double-tip catheter is difficult to realize free sliding along the axial direction of the sheath tube because the distal part of the double-tip catheter always has elastic stress of scissor-like movement.

Disclosure of Invention

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a puncture system of hemodialysis pipe.

According to the utility model discloses hemodialysis pipe's puncture system, include: a catheter, comprising: the catheter comprises a catheter body, a catheter body and a catheter, wherein the catheter body extends along the left-right direction and is provided with an inner cavity, the inner cavity is at least divided into two circulation cavities extending along the axial direction of the catheter body, the two circulation cavities are mutually independent, the two circulation cavities are a vein cavity and an artery cavity respectively, the right end of the catheter body is of a bifurcation structure and comprises a vein tip and an artery tip, the vein tip is communicated with the vein cavity, and the artery tip is communicated with the artery cavity; the vein extension tube is arranged on the left side of the tube body, and one end of the vein extension tube is communicated with the vein cavity; the artery extension tube is arranged on the left side of the tube body, and one end of the artery extension tube is communicated with the artery cavity; the locking guide wire can freely pass through the artery extension tube, the artery cavity and the artery tip, and comprises a hook arranged at the right end of the locking guide wire, and the hook is hooked at the right end of the vein tip; the tearable sheath is provided with a sheath tube with a hollow inner cavity, and the inner diameter of the sheath tube is matched with the outer diameter of the tube body.

According to the utility model discloses hemodialysis pipe's puncture system has following technological effect at least: the venous tip and the arterial tip of the catheter are set into mutually independent bifurcation structures, so that the venous tip and the arterial tip extend reversely in a scissor-like manner, the blood outflow direction of the venous tip and the arterial tip can be prevented from being in the same direction, the blood recirculation is avoided, the dialysis treatment efficiency is improved, the hook of the locking guide wire extends out from the arterial tip and is hooked on the venous tip, the venous tip and the arterial tip can be attached and locked, the right end of the catheter in the bifurcation structure can be conveniently inserted into the sheath and can freely slide in the sheath along the axial direction, and after the catheter is placed, the locking guide wire can be taken out to unlock the venous tip and the arterial tip, so that the venous tip and the arterial tip are in an unstressed bifurcation structure again in a blood vessel; when the puncture catheter is used, the locking guide wire is firstly used for attaching and locking the vein tip and the artery tip, the tearable sheath is inserted into a blood vessel, then the right end of the catheter is inserted into the sheath, the tearable sheath is stripped while being pulled out, and finally the locking guide wire is taken out and unlocked, so that the puncture catheter placing operation is completed.

According to some embodiments of the present invention, the middle section of the tube body is sleeved with a tube sleeve, which can be tightly combined with subcutaneous tissue to isolate bacterial invasion and infection when the hemodialysis catheter is inserted into a blood vessel of a human body.

According to some embodiments of the present invention, the tube sleeve is a medical polyester tube sleeve or a medical nylon tube sleeve, which has good biocompatibility.

According to some embodiments of the invention, the length of the venous tip is longer than the length of the arterial tip, facilitating a completely staggered arrangement of the venous tip and the arterial tip, thereby avoiding recirculation of blood.

According to some embodiments of the utility model, the tearable sheath still includes the sheath seat, sheath seat rigid coupling in the left end of sheath pipe, the inner chamber cavity of sheath seat and with the inner chamber intercommunication of sheath pipe, the sheath seat includes the orientation the portion of wrenching that extends outside the body, the portion of wrenching be convenient for medical personnel to grip and tear the operation to the sheath pipe.

According to some embodiments of the utility model, the other end of the vein extension pipe is equipped with the vein and connects, the other end of the artery extension pipe is equipped with the artery and connects, and the vein connects and the artery connects and can be used to connect outside hemodialysis machine respectively.

According to some embodiments of the utility model, the locking seal wire is still including locating the locking joint of its left end, the locking joint with the artery connects clearance fit, and the locking joint is used for fixing the locking seal wire on the artery connects, is convenient for send into the sheath pipe that can tear the sheath with the fixed back as an organic whole of pipe and locking seal wire.

According to some embodiments of the utility model, be equipped with the venous clamp on the vein epitaxial tube, be equipped with the artery clamp on the artery epitaxial tube, venous clamp and artery clamp are used for controlling opening and sealing of vein epitaxial tube and artery epitaxial tube respectively.

According to the utility model discloses a some embodiments, be equipped with the connecting seat on the body, the connecting seat is the bifurcation structure, the vein extension pipe the artery extension pipe passes through respectively the connecting seat with the body is connected, the vein extension pipe the artery extension pipe the connecting seat with body integrated into one piece, workable, product size precision is high, and the leakproofness is good.

According to some embodiments of the utility model, the body the vein extension pipe artery extension pipe with the connecting seat is silica gel or polyurethane, can guarantee that the pipe has certain hardness in vitro to it is softer in subcutaneous tissue, biocompatibility is good.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an assembly structure of a puncture system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the catheter shown in FIG. 1

FIG. 3 is a schematic cross-sectional configuration of the catheter shown in FIG. 1;

FIG. 4 is a schematic view of the locking guidewire of FIG. 1;

FIG. 5 is a schematic view of the tearable sheath of FIG. 1;

fig. 6 is a schematic view of the catheter shown in fig. 1 placed in subcutaneous tissue of a human body.

Reference numerals:

100-catheter, 110-catheter body, 120-venous tip, 130-arterial tip, 140-venal extension tube, 141-venous connector, 142-venous clamp, 150-arterial extension tube, 151-arterial connector, 152-arterial clamp, 160-catheter sleeve, catheter tip, catheter adapter,

200-locking guide wire, 210-hook, 220-locking joint,

300-tearable sheath, 310-sheath tube, 320-sheath seat, 321-wrench part,

400-connecting seat,

500-subcutaneous tissue,

600-blood vessel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional descriptions, such as the directions or positional relationships indicated by the upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring now to fig. 1-6, the piercing system of the hemodialysis catheter 100 of the present invention is embodied as follows:

as shown in fig. 1 to 5, the puncture system of the hemodialysis catheter 100 according to the embodiment of the present invention includes a catheter 100, a tearable sheath 300 and a locking guide wire 200, the catheter 100 includes a tube 110, the tube 110 extends along the left and right direction, the tube 110 has an inner cavity, the inner cavity is divided into at least two flow cavities extending along the axial direction thereof, the two flow cavities are independent from each other, the two flow cavities are a venous cavity and an arterial cavity, the right end of the tube 110 is a venous tip 120 and an arterial tip 130 of a bifurcation structure, the venous tip 120 is communicated with the venous cavity, the arterial tip 130 is communicated with the arterial cavity, the left side of the tube 110 is provided with a venous extension tube 140 and an arterial extension tube 150, one end of the venous extension tube 140 is communicated with the venous cavity, and one end of the arterial extension tube 150 is communicated with the arterial cavity. During the use, vein extension pipe 140 is used for connecting the exit end of outside cerini dialyser cerini, artery extension pipe 150 is used for connecting the entrance end of outside cerini dialyser cerini, set up vein tip 120 and artery tip 130 with pipe 100 into mutually independent bifurcation structure, make vein tip 120 and artery tip 130 both be scissors appearance reverse extension, can avoid the blood outflow direction of vein tip 120 and artery tip 130 in same direction, thereby be convenient for vein tip 120 and artery tip 130 independently guide the blood flow through the different directions wherein respectively, avoid the recirculation of blood, when blood after the cerini dialyser cerini purifies returns the human body promptly, the condition of part reentrant cerini dialyser cerini through the artery chamber again, thereby improve dialysis treatment efficiency. It will be appreciated that three or more flow-through chambers may be provided in the body 110 to accommodate different applications.

As can be seen in fig. 2, since the venous tip 120 and the arterial tip 130 extend in opposite directions like scissors, not only is it difficult to achieve alignment into the sheath 310 of the tearable sheath 300, but also when the catheter 100 slides in the sheath 310, it is difficult to achieve free sliding of the catheter 100 along the sheath 310 axis due to the elastic stress of the constant scissors-like movement of the venous tip 120 and the arterial tip 130. Thus, in the embodiment of the present invention, the locking tearable sheath 300 and the locking guidewire 200 are provided to assist the catheter 100 to puncture the catheter, the tearable sheath 300 has a sheath 310 with a hollow inner cavity, the inner diameter of the sheath 310 is matched with the outer diameter of the tube 110, so that the tube 110 can be inserted into the sheath 310, the locking guide wire 200 can freely pass through the artery extension tube 150, the artery cavity and the artery tip 130, the locking guide wire 200 comprises a hook 210 arranged at the right end thereof, the hook 210 is hooked on the right end of the vein tip 120 after extending out from the artery tip 130, so that the vein tip 120 and the artery tip 130 can be attached and locked to form no bifurcation, so that the right end of the catheter 100 in the bifurcated structure is inserted into the sheath 310 and freely slides in the sheath 310 in the axial direction, and when the catheterization is completed, the locking guidewire 200 can be removed to unlock the venous tip 120 from the arterial tip 130, allowing it to again assume an unstressed bifurcated configuration within the vessel 600. The locking wire 200 may be made of spring stainless steel, so that the hook 210 has a certain elasticity.

When the locking guide wire 200 is used, the locking guide wire 200 is firstly inserted into an artery cavity, the hook 210 of the locking guide wire 200 extends out from the artery tip 130 and is hooked on the vein tip 120, so that the vein tip 120 is attached and locked with the artery tip 130, the tearable sheath 300 is inserted into a blood vessel 600, then the right end of the catheter 100 attached and locked is inserted into the sheath tube 310 of the tearable sheath 300, after the catheter 100 is inserted to a preset position, the tearable sheath 300 is pulled out while being stripped, finally, the hook 210 of the locking guide wire 200 is unlocked and pulled out, the vein tip 120 and the artery tip 130 of the catheter 100 are in a bifurcation structure in the blood vessel 600 again, and the catheterization operation is completed, and the catheter 100 is basically horizontally inserted into the blood vessel 600 of a human body, and particularly refer to fig. 6.

In addition, the length of the venous tip 120 should be longer than the length of the arterial tip 130 to facilitate a complete offset placement of the venous tip 120 from the arterial tip 130 to avoid recirculation of blood.

In consideration of the indwelling time of the catheter 100, a tube 160 is sleeved on the middle portion of the tube body 110, and when the hemodialysis catheter 100 is inserted into a human blood vessel 600, the tube 160 can be tightly combined with the subcutaneous tissue 500 to isolate bacterial invasion infection, thereby prolonging the indwelling time of the catheter 100 in the blood vessel 600 and reducing the number of times of puncture. The tube sleeve 160 may be a medical polyester tube sleeve or a medical nylon tube sleeve, which has good biocompatibility, and the tube sleeve 160 may be adhered to the outer surface of the tube body 110 using glue.

In some embodiments of the present invention, the other end of the venous extension tube 140 is provided with a venous connector 141, the other end of the arterial extension tube 150 is provided with an arterial connector 151, and the venous connector 141 and the arterial connector 151 are respectively used for connecting an external hemodialysis machine. When hemodialysis needs to be performed for multiple times, the venous connector 141 and the arterial connector 151 are communicated with an external dialyzer again, and patients do not need to be punctured again, so that pain of the patients is relieved.

Further, the venous extension tube 140 is provided with a venous clamp 142, the arterial extension tube 150 is provided with an arterial clamp 152, the venous clamp 142 and the arterial clamp 152 are respectively used for controlling the opening and closing of the venous extension tube 140 and the arterial extension tube 150, and the venous clamp 142 and the arterial clamp 152 can be made of polypropylene materials.

In addition, be equipped with connecting seat 400 on the body 110, connecting seat 400 is the bifurcation structure, and vein extension pipe 140, artery extension pipe 150 are connected with body 110 through connecting seat 400 respectively, and vein extension pipe 140, artery extension pipe 150, connecting seat 400 and body 110 integrated into one piece, workable, product size precision is high, and the leakproofness is good. The tube body 110, the vein extension tube 140, the artery extension tube 150 and the connection seat 400 are made of silica gel or polyurethane, so that the catheter 100 has certain hardness in vitro, is softer in the subcutaneous tissue 500 and has good biocompatibility.

In some embodiments of the present invention, the tearable sheath 300 further includes a sheath seat 320, the sheath seat 320 is fixedly connected to the left end of the sheath 310, the inner cavity of the sheath seat 320 is hollow and is communicated with the inner cavity of the sheath 310, the sheath seat 320 includes a pulling portion 321 extending toward the outer side of the tube body 110, the pulling portion 321 is convenient for the medical staff to hold and tear the sheath 310, the sheath seat 320 can be made of polypropylene material, and the sheath 310 can be made of fluoroplastics FEP.

Further, the locking guide wire 200 further comprises a locking connector 220 arranged at the left end of the locking guide wire, the locking connector 220 is in clearance fit with the artery connector 151, the locking connector 220 is used for fixing the locking guide wire 200 on the artery connector 151, the catheter 100 and the locking guide wire 200 are conveniently fixed into a whole and then sent into the sheath 310 of the tearable sheath 300, when the locking guide wire 200 needs to be pulled out of the sheath 310, the locking connector 220 is pulled out of the artery connector 151, and the locking connector 220 is made of polypropylene.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A hemodialysis catheter puncture system, comprising:

a catheter (100) comprising:

a tube (110) extending in a left-right direction, the tube (110) having an inner cavity divided into at least two flow-through chambers extending in an axial direction thereof, the two flow-through chambers being independent of each other, the two flow-through chambers being a venous chamber and an arterial chamber, respectively, a right end of the tube (110) having a bifurcated structure and including a venous tip (120) and an arterial tip (130), the venous tip (120) being in communication with the venous chamber, the arterial tip (130) being in communication with the arterial chamber;

a venous extension tube (140) provided on the left side of the tube body (110), one end of which communicates with the venous lumen;

an artery extension tube (150) which is provided on the left side of the tube body (110) and one end of which communicates with the artery cavity;

a locking guidewire (200) freely movable through the arterial extension tube (150), the arterial lumen and the arterial tip (130), the locking guidewire (200) including a hook (210) disposed at a right end thereof, the hook (210) being hooked to a right end of the venous tip (120);

a tearable sheath (300) having a hollow-lumen sheath (310), the sheath (310) having an inner diameter matching an outer diameter of the tube body (110).

2. The hemodialysis catheter puncture system according to claim 1, wherein a sleeve (160) is sleeved on a middle portion of the tube body (110).

3. The hemodialysis catheter puncture system according to claim 2, wherein the sheath (160) is a medical dacron sheath or a medical nylon sheath.

4. The hemodialysis catheter puncture system according to claim 1, wherein the venous tip (120) has a length longer than a length of the arterial tip (130).

5. The puncture system for hemodialysis catheter according to claim 1, wherein the tearable sheath (300) further comprises a sheath holder (320), the sheath holder (320) is fixedly attached to the left end of the sheath (310), the lumen of the sheath holder (320) is hollow and communicates with the lumen of the sheath (310), and the sheath holder (320) comprises a pulling portion (321) extending toward the outside of the tube (110).

6. The hemodialysis catheter puncture system according to claim 1, wherein the venous extension tube (140) is provided at the other end with a venous connector (141), and the arterial extension tube (150) is provided at the other end with an arterial connector (151).

7. The hemodialysis catheter puncture system according to claim 6, wherein the locking guidewire (200) further comprises a locking connector (220) provided at a left end thereof, and the locking connector (220) is clearance-fitted with the arterial connector (151).

8. The hemodialysis catheter puncture system according to claim 1, wherein a venous clamp (142) is provided on the venous extension tube (140), and an arterial clamp (152) is provided on the arterial extension tube (150).

9. The hemodialysis catheter puncture system according to claim 1, wherein a connection seat (400) is provided on the tube body (110), the connection seat (400) is a bifurcated structure, the venous extension tube (140) and the arterial extension tube (150) are respectively connected to the tube body (110) through the connection seat (400), and the venous extension tube (140), the arterial extension tube (150), the connection seat (400) and the tube body (110) are integrally formed.

10. The hemodialysis catheter puncture system according to claim 9, wherein the tube body (110), the venous extension tube (140), the arterial extension tube (150), and the connection seat (400) are made of silicone or polyurethane.

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