CN213312269U - Hemodialysis catheter - Google Patents

Abstract

The utility model discloses a hemodialysis catheter, which comprises a catheter body, wherein the catheter body is provided with an inner cavity, the inner cavity is at least divided into three circulation cavities extending along the axial direction of the catheter body, the three circulation cavities are mutually independent, the three circulation cavities are respectively a vein cavity, an artery cavity and a flushing cavity, the side surface of the flushing cavity is provided with a flushing side port, and the flushing side port is arranged at the middle section of the catheter body; the pipe sleeve is sleeved on the outer surface of the pipe body, is arranged on the right side of the washing side port and is close to the washing side port, or covers the washing side port; 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; and one end of the flushing extension pipe is communicated with the flushing cavity. The utility model discloses a pipe box is established to the cover on the body, sets the body to have the multicavity structure that washes the chamber, and the flush fluid can flow to pipe box department through washing the chamber, carries out the cleaning and disinfecting to the pipe box.

Description

Hemodialysis catheter

Technical Field

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

Background

The hemodialysis catheter is an intravascular catheter for dialysis treatment, generally is punctured from subclavian vein, internal jugular vein or femoral vein and is connected with an extracorporeal circulation blood loop, a hemodialysis machine and a hemodialyzer during dialysis treatment, the dialyzer filters impurities in blood by utilizing the molecular diffusion effect, regulates ion balance, finally enters the venous end of the dialysis catheter through the venous pipeline of the blood loop and returns to a human body to form circulation.

Conventional hemodialysis catheters are medical devices that are used for a short period of time, not longer than 30 days. In addition, at present, there is also a hemodialysis catheter which is left for a long time, the catheter body is divided into two sections, the front end of the catheter body is inserted into a venous blood vessel, the middle section of the catheter body is positioned in the subcutaneous layer, a section of fiber terylene covers the catheter body, the catheter body is left in the blood vessel of a human body for a long time, and the terylene covered section can play a role in isolating the invasion of bacteria and preventing the infection of the blood vessel and a puncture port. However, as the retention time increases, the fiber polyester segment may be gradually contaminated by external bacteria, thereby losing the effect of isolating bacteria and failing to achieve continuous long-term retention.

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 hemodialysis catheter.

According to the utility model discloses hemodialysis pipe, include: the catheter comprises a catheter body, a catheter body and a catheter body, 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 three circulation cavities extending along the axial direction of the catheter body, the three circulation cavities are mutually independent, the three circulation cavities are a venous cavity, an arterial cavity and a flushing cavity respectively, a flushing side opening is formed in the side surface of the flushing cavity, and the flushing side opening is formed in the middle section of the catheter body; the pipe sleeve is sleeved on the outer surface of the pipe body, is arranged on the right side of the flushing side port and is close to the flushing side port, or covers the flushing side port; 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; and the flushing extension pipe is arranged on the left side of the pipe body, and one end of the flushing extension pipe is communicated with the flushing cavity.

According to the utility model discloses hemodialysis pipe has following technological effect at least: the pipe sleeve is sleeved on the pipe body, when the hemodialysis catheter is inserted into a blood vessel of a human body, the pipe sleeve can be tightly combined with subcutaneous tissues to isolate bacterial invasion infection, the pipe body is set to be of a structure at least comprising a vein cavity, an artery cavity and a flushing cavity, the vein cavity and the artery cavity are used for being communicated with an external dialyzer to achieve hemodialysis treatment, the flushing cavity is used for being communicated with external flushing equipment, the flushing equipment can guide flushing fluid to the pipe sleeve through a flushing side port of the flushing cavity, the flushing fluid can clean and disinfect the pipe sleeve by being in contact with the pipe sleeve, the pipe sleeve can continuously provide the effect of isolating bacteria, the time of the hemodialysis indwelling catheter in the blood vessel of the human body can be prolonged, and the puncture times of a patient can be reduced.

According to some embodiments of the present invention, the tube cover is a medical dacron tube cover or a medical nylon tube cover, which has good biocompatibility with human tissue, and can be closely combined with the subcutaneous tissue of the human body to isolate the invasion of bacteria into blood vessels, thereby avoiding infection.

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

According to some embodiments of the utility model, the other end of vein extension pipe is equipped with the vein and connects, the other end of artery extension pipe is equipped with the artery and connects, the other end that washes extension pipe is equipped with the flushing joint, and the vein connects and the artery connects and can be used to connect outside hemodialysis machine respectively, and the flushing joint is used for connecting outside cleaning equipment.

According to the utility model discloses a some embodiments, the right-hand member portion of body right side protrusion is equipped with the pointed end portion, the end of pointed end portion has been seted up the venous port in venous cavity, seted up the side of the right-hand member portion of body the artery port in artery cavity staggers the setting with the right-hand member mouth in venous cavity and artery cavity, can avoid the hemodialysis in-process to take place blood recirculation, and the pointed end portion is convenient for puncture.

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

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

According to some embodiments of the utility model, the venous clamp artery clamp with the material of flushing pipe clamp is polypropylene, the light, and chemical stability 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 structural view of a hemodialysis catheter according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the tubular body shown in FIG. 1;

FIG. 3 is an enlarged schematic view of the portion A shown in FIG. 1;

fig. 4 is a schematic view showing the structure of the hemodialysis cannula of fig. 1 placed in subcutaneous tissue of a human body.

Reference numerals:

100-tube body, 110-vein cavity, 120-artery cavity, 130-flushing cavity, 140-tip part,

200-pipe sleeve,

300-venous extension tube, 310-venous tube clamp, 320-venous connector,

400-arterial extension tube, 410-arterial tube clamp, 420-arterial joint,

500-flush extension tube, 510-flush tube clamp, 520-flush adapter,

600-connecting seat,

700-subcutaneous tissue,

800-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. 1-4, the hemodialysis catheter of the present invention is made in the following embodiments:

as shown in fig. 1 to 4, a hemodialysis catheter according to an embodiment of the present invention includes a tube 100, the tube 100 extends in a left-right direction, the tube 100 has an inner cavity, the inner cavity of the tube 100 is divided into at least three circulation cavities extending along an axial direction thereof, the three circulation cavities are independent from each other, the three circulation cavities are a venous cavity 110, an arterial cavity 120 and a flushing cavity 130, a flushing side port is opened on a side surface of the flushing cavity 130, the flushing side port is disposed at a middle section of the tube 100, a venous extension tube 300, an arterial extension tube 400 and a flushing extension tube 500 are disposed on a left side of the tube 100, one end of the venous extension tube 300 is communicated with the venous cavity 110, one end of the arterial extension tube 400 is communicated with the arterial cavity 120, one end of the flushing extension tube 500 is communicated with the flushing cavity 130, the venous extension tube 300 and the other end of the arterial extension tube 400 are used for connecting an external ventilator to achieve hemodialysis treatment, the other end of the flushing lumen 130 is used for connecting an external flushing device. In addition, the middle section of the tube body 100 is sleeved with the tube sleeve 200, when the hemodialysis catheter is inserted into the human body blood vessel 800, the tube sleeve 200 can be tightly combined with the subcutaneous tissue 700 to isolate bacteria from invading the blood vessel 800, so as to avoid infection, the tube sleeve 200 needs to be arranged close to the flushing side port, so that external cleaning equipment can guide flushing fluid to the tube sleeve 200 through the flushing side port of the flushing cavity 130, the flushing fluid is contacted with the tube sleeve 200 to clean and disinfect the tube sleeve 200, so that the tube sleeve 200 can continuously provide the effect of isolating bacteria, the indwelling time of the hemodialysis catheter in the human body blood vessel 800 can be increased, and the puncture times of a patient can be reduced. Wherein, the cleaning solution can be normal saline or other disinfectant. In addition, the pipe sleeve 200 can be arranged in two ways, one way is that the pipe sleeve 200 is arranged at the right side of the flushing side port, the pipe sleeve 200 is arranged close to the flushing side port as much as possible, the pipe sleeve 200 is arranged along the outflow direction of the flushing liquid, and when the flushing liquid flowing out from the flushing side port flows along the flowing direction, the flushing liquid can contact the pipe sleeve 200 which is closest to the flushing side port; alternatively, the sleeve 200 may be arranged to cover the flushing side port, and the flushing liquid flowing out through the flushing side port may flow directly onto the sleeve 200. It is understood that one or two or more cleaning chambers may be provided in the tube 100, i.e., the tube 100 may be provided in a three-chamber structure, a four-chamber structure or a multi-chamber structure.

Further, the tube sleeve 200 is a medical polyester tube sleeve or a medical nylon tube sleeve, which has good biocompatibility with human tissue, can be tightly combined with the subcutaneous tissue 700 of the human body to isolate bacteria from invading the blood vessel 800, and avoid infection, and the tube sleeve 200 can be adhered to the outer surface of the tube body 100 by using glue.

In some embodiments of the present invention, the venous extension tube 300 is provided with a venous clamp 310, the arterial extension tube 400 is provided with an arterial clamp 410, the flushing extension tube 500 is provided with a flushing clamp 510, and the venous clamp 310, the arterial clamp 410 and the flushing clamp 510 are respectively used for controlling the opening and closing of the venous extension tube 300, the arterial extension tube 400 and the flushing extension tube 500.

Further, the other end of the venous extension tube 300 is provided with a venous connector 320, the other end of the arterial extension tube 400 is provided with an arterial connector 420, the other end of the flushing extension tube 500 is provided with a flushing connector 520, the venous connector 320 and the arterial connector 420 can be respectively used for connecting with an external hemodialysis machine, and the flushing connector 520 is used for connecting with external cleaning equipment. When hemodialysis needs to be performed for multiple times, the venous connector 320 and the arterial connector 420 are communicated with an external dialyzer again, and patients do not need to be punctured again, so that pain of the patients is relieved.

In order to avoid blood recirculation, that is, when blood purified by the dialyzer returns to the human body, a part of the blood enters the dialyzer again through the artery cavity 120, the vein port of the vein cavity 110 is disposed at the right side of the artery port of the artery cavity 120, and the vein port and the artery port can be staggered, specifically, the right end of the tube body 100 is provided with the tip part 140 protruding rightwards, the tail end of the tip part 140 is provided with the vein port of the vein cavity 110, the side surface of the right end of the tube body 100 is provided with the artery port of the artery cavity 120, and the tip part 140 is also convenient for puncture.

The utility model discloses a in some embodiments, be equipped with connecting seat 600 on body 100, connecting seat 600 is the bifurcation structure, and extension tube 300, extension tube 400 of vein, wash extension tube 500 all are connected with body 100 through connecting seat 600, and extension tube 300 of vein, extension tube 400 of artery, wash extension tube 500, connecting seat 600 and body 100 integrated into one piece, workable, product size precision is high, and the leakproofness is good.

In addition, the venous extension tube 300, the arterial extension tube 400, the flushing extension tube 500, the connecting seat 600 and the tube body 100 are respectively made of one of silica gel or polyurethane, so that the catheter can have certain hardness in vitro, is softer in subcutaneous tissue 700, and has good biocompatibility, and the venous tube clamp 310, the arterial tube clamp 410 and the flushing tube clamp 510 are made of polypropylene, so that the catheter is light and has good chemical stability.

In use, and with particular reference to fig. 4, the hemodialysis catheter is inserted substantially horizontally into a body vessel 800, a venous port of the venous lumen 110, and the artery ports of the artery cavity 120 are all arranged in the blood vessel 800, the vein extension tube 300, the artery extension tube 400 and the flushing extension tube 500 extend out of the human body, the blood circulates to an external dialyzer through the artery cavity 120 and the artery extension tube 400 for dialysis purification, the blood after dialysis purification returns to the human body through the vein extension tube 300 and the vein cavity 110, the pipe sleeve 200 arranged at the middle section is arranged on the subcutaneous tissue 700 layer, to prevent further invasion of bacteria into the blood vessel 800, and when the in vivo residence time of the hemodialysis catheter is long, the rinse solution can be circulated into the rinse chamber 130 through the rinse extension tube 500, and then out through the rinse side port to the tube housing 200, to rinse and sterilize the pipe sleeve 200 to ensure that the pipe sleeve 200 continuously keeps the function of isolating bacteria.

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 gist of the present invention within the knowledge range of those skilled in the art.

Claims (8)

1. Hemodialysis catheter, characterized by comprising:

the device comprises a pipe body (100) extending along the left-right direction, wherein the pipe body (100) is provided with an inner cavity which is at least divided into three circulation cavities extending along the axial direction of the pipe body, the three circulation cavities are mutually independent and are respectively a vein cavity (110), an artery cavity (120) and a flushing cavity (130), a flushing side opening is formed in the side surface of the flushing cavity (130), and the flushing side opening is arranged in the middle section of the pipe body (100);

a pipe sleeve (200) sleeved on the outer surface of the pipe body (100), wherein the pipe sleeve (200) is arranged at the right side of the flushing side port and is close to the flushing side port, or the pipe sleeve (200) covers the flushing side port;

a venous extension tube (300) provided on the left side of the tube body (100), one end of which communicates with the venous lumen (110);

an artery extension tube (400) which is provided on the left side of the tube body (100) and one end of which communicates with the artery cavity (120);

and a flushing extension pipe (500) which is arranged at the left side of the pipe body (100) and one end of which is communicated with the flushing cavity (130).

2. Hemodialysis catheter according to claim 1, wherein the sheath (200) is a medical dacron sheath or a medical nylon sheath.

3. The hemodialysis catheter of claim 1, wherein a venous clamp (310) is provided on the venous extension tube (300), an arterial clamp (410) is provided on the arterial extension tube (400), and a flush clamp (510) is provided on the flush extension tube (500).

4. The hemodialysis catheter according to claim 1, wherein the venous extension tube (300) is provided at the other end thereof with a venous connector (320), the arterial extension tube (400) is provided at the other end thereof with an arterial connector (420), and the flushing extension tube (500) is provided at the other end thereof with a flushing connector (520).

5. The hemodialysis catheter according to claim 1, wherein a tip portion (140) protrudes rightward from a right end of the tube (100), a distal end of the tip portion (140) opens a venous port of the venous lumen (110), and a lateral surface of the right end of the tube (100) opens an arterial port of the arterial lumen (120).

6. The hemodialysis catheter according to claim 1, wherein a connection seat (600) is provided on the catheter body (100), the connection seat (600) is a bifurcated structure, the vein extension tube (300), the artery extension tube (400), and the flushing extension tube (500) are respectively connected to the catheter body (100) through the connection seat (600), and the vein extension tube (300), the artery extension tube (400), the flushing extension tube (500), the connection seat (600) and the catheter body (100) are integrally formed.

7. The hemodialysis catheter according to claim 6, wherein the venous extension tube (300), the arterial extension tube (400), the flushing extension tube (500), the connection seat (600) and the catheter body (100) are made of one of silicone or polyurethane.

8. The hemodialysis catheter of claim 3, wherein the venous clamp (310), the arterial clamp (410), and the flush clamp (510) are all polypropylene.

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