CN209437761U - A puncture-insertable peritoneal dialysis tube - Google Patents

Abstract

The utility model relates to a kind of puncture built-in type peritoneum dialysis catheters, including puncture needle, guidance seal wire, expander and peritoneal dialysis tube body；Wherein, guidance seal wire can be threaded through in the inner cavity of puncture needle or expander, and expander can be threaded through in the inner cavity of peritoneal dialysis tube body；Puncture needle includes needle stand, needle body and needle point, and the tip of needle point is round blunt tack；Peritoneal dialysis tube body includes the successively catheter body of integrally connected, catheter drainage section and tip, and the inside of catheter body, catheter drainage section and tip has the continuous cavity to match with expander.The proximal end of catheter body has the flat mouth that penetrates for expander, and the tip of expander can be penetrated by the proximal end of catheter body, sequentially pass through the processus aboralis of catheter body and catheter drainage section for tip outside, and peritoneal dialysis tube body can be released forward along the length direction of expander.The utility model has the characteristics that structure is simple, manufacturing cost is cheap, is widely used, being easy to universal.

Description

A puncture-insertable peritoneal dialysis tube

technical field

The utility model relates to a medical device, in particular to a puncture-inserted peritoneal dialysis tube.

Background technique

Peritoneal dialysis is a treatment method for the purpose of discharging various uremic toxins by repeatedly infusing and discharging peritoneal dialysate into the peritoneal cavity. It is mainly used for patients with renal failure. There are three traditional ways to insert peritoneal dialysis tubes: 1. Surgical incision of the abdominal wall and insertion of peritoneal dialysis tubes. This method is the most commonly used, but the incision operation needs to be performed under operating room conditions. It needs 2 weeks of healing time before it can be used; 2. Use laparoscopy to insert the tube, which is complicated and rarely used; 3. Use the seldinger technique to puncture and insert the peritoneal dialysis tube, which is simple and easy.

However, the disadvantages of the existing puncture catheterization methods are: 1) use a sharp puncture needle to puncture, and there is no breakthrough feeling when entering the abdominal cavity, and it is impossible to judge whether the needle tip has entered the abdominal cavity during the puncture process, especially for patients without ascites; 2) the needle tip Sharp, after entering the abdominal cavity, the risk of damaging the intra-abdominal organs is high; 3) A tear-off outer sheath is used during the operation. Due to the existence of the outer sheath, the peritoneal dialysis tube is not tightly combined with the peritoneal opening, and it is easy to perform peritoneal dialysis treatment in the short term after surgery Leakage occurs; 4) In order to successfully insert the catheter tip into the vesico-rectal fossa, it is often necessary to separately insert a hard guide wire into the catheter as a support for adjustment.

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a puncture-inserted peritoneal dialysis tube with simple structure, low manufacturing cost, wide application and easy popularization.

In order to achieve the above object, the utility model adopts the following technical solutions: a puncture-insertable peritoneal dialysis tube, characterized in that it includes a puncture needle (10), a guide wire (20), a dilator (30) and a peritoneal dialysis tube Body (40); wherein, the guide wire (20) can be threaded in the lumen of the puncture needle (10) or the dilator (30), and the dilator (30) can be threaded in In the inner cavity of the peritoneal dialysis tube body (40).

In a preferred embodiment, the puncture needle (10) is an atraumatic body cavity puncture needle, and the atraumatic body cavity puncture needle includes a needle base (11), a needle body (12) and a needle point (13), and the The tip of the needle point (13) is a blunt flat head.

In a preferred embodiment, the interior of the needle base (11), needle body (12) and needle tip (13) has a continuous cavity matching the guide wire (20), and the guide wire (20) can pass through the needle seat (11), pass through the needle body (12), and pass out from the needle tip (13).

In a preferred embodiment, the proximal end of the dilator (30) is connected to a Luer connector, and the distal end has a tip matching the guiding wire (20).

In a preferred embodiment, the peritoneal dialysis tube body (40) includes a catheter body (41), a catheter drainage section (42) and a tube tip (43) that are sequentially integrally connected, and the catheter body (41), The interior of catheter drainage section (42) and pipe tip (43) has a continuous cavity matched with the dilator (30); the proximal end of the catheter body (41) has a hole for the dilator (30) to pass through. The tip of the dilator (30) can be inserted through the proximal end of the catheter body (41), passing through the catheter body (41) and the back of the catheter drainage section (42) in turn protruding from the outside the tube tip (43), and the peritoneal dialysis tube body (40) can be pushed forward along the length direction of the dilator (30).

In a preferred embodiment, several side holes (45) are evenly distributed on the catheter drainage section (42), and its distal section is in a curled shape, and the distal section of the catheter drainage section (42) is placed between the dilator ( 30) The initial state after being assembled with the peritoneal dialysis tube body (40) is straightened, and the curled shape is restored after the peritoneal dialysis tube body (40) is pushed forward.

In a preferred embodiment, the tube tip (43) is connected to the distal end of the catheter drainage section (42), the tube tip (43) is tapered and has a certain hardness, and the tube tip (43) matches the tip of said dilator (30).

In a preferred embodiment, the catheter body (41) is made of medical polymer material, and at least one polyester sheath (44) is arranged outside the catheter body (42).

In a preferred embodiment, the peritoneal dialysis tube body (40) can be designed as a gooseneck tube with double polyester sleeves, a straight tube with double polyester sleeves, a gooseneck tube with a single polyester sleeve or a straight tube with a single polyester sleeve.

In a preferred embodiment, the surface of the needle body (12) and the surface of the dilator (30) have marked scales.

Due to the adoption of the above technical scheme, the utility model has the following advantages: for patients who need maintenance peritoneal dialysis, the utility model has the following advantages: 1) The process of placing the peritoneal dialysis tube is greatly simplified, and it can be operated under local anesthesia, Small trauma, no need for incision surgery; 2) The puncture feels clear, and there is an obvious breakthrough feeling when the puncture needle passes through the peritoneum, which can be used as a basis for judging the puncture depth; 3) It is easy to judge whether the needle tip has entered the peritoneal cavity, especially when there is no peritoneal effusion 4) It greatly reduces the risk of damage to abdominal organs caused by the puncture needle tip; 5) Since the peritoneal dialysis tube is thicker than the dilator, the opening of the peritoneum is tight after the catheter is inserted. Wrap the catheter without gaps, reduce the risk of peritoneal dialysis leakage, and start peritoneal dialysis treatment early after the operation, saving time for the treatment of patients; 6) After the peritoneal dialysis tube is pushed forward, the dilator can be used as the peritoneal dialysis tube to adjust the peritoneum The position of the end section of the dialysis tube in the abdominal cavity is convenient for successful insertion into the vesico-rectal fossa. There is no need to change the inner guide wire during this process. Due to the protection of the peritoneal dialysis tube, the risk of damage to the internal organs of the abdominal cavity is also avoided during this process.

Description of drawings

Fig. 1 is the structural representation of puncture needle of the present utility model;

Fig. 2 is the structural representation of guiding wire of the present invention;

Fig. 3 is the structural representation of the utility model dilator;

Fig. 4 is a schematic structural view of the peritoneal dialysis tube body of the present invention;

Fig. 5 is a structural schematic diagram of the assembled guide wire, dilator and peritoneal dialysis tube body;

Fig. 6 is a structural schematic view after the dilator and the peritoneal dialysis tube body are assembled and the peritoneal dialysis tube body is pushed out;

Fig. 7 is a structural schematic diagram of a gooseneck with double polyester sleeves;

Fig. 8 is a schematic structural view of a straight pipe with double polyester sleeves;

Fig. 9 is a schematic structural view of a gooseneck with a single polyester sleeve;

Fig. 10 is a schematic structural view of a straight pipe with a single polyester sleeve.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail. However, it should be understood that the drawings are only provided for better understanding of the utility model, and they should not be construed as limiting the utility model.

As shown in FIGS. 1 to 4 , the peritoneal dialysis tube provided by the present invention includes a puncture needle 10 , a guide wire 20 , a dilator 30 and a peritoneal dialysis tube body 40 . The guide wire 20 can be passed through the lumen of the puncture needle 10 or the dilator 30 , and the dilator 30 can be passed through the lumen of the peritoneal dialysis tube body 40 .

In a preferred embodiment, the puncture needle 10 is an atraumatic body cavity puncture needle, which includes a needle base 11, a needle body 12 and a needle point 13, and the tip of the needle point 13 is a round blunt flat head with smooth edges without burrs .

In a preferred embodiment, the inside of the needle base 11, the needle body 12 and the needle tip 13 has a continuous cavity matching the guide wire 20, the guide wire 20 can be passed through the needle base 11, and after passing through the needle body 12 Pass through the needle point 13.

In a preferred embodiment, the surface of the needle body 12 has marking scales.

In a preferred embodiment, the proximal end of the dilator 30 is connected to a Luer connector, the distal end has a tip that matches the guide wire 20, and the surface of the dilator 30 has marked scales. The Luer connector can prevent the peritoneal dialysis tube body 40 of the overcoat from sliding backwards, and at the same time facilitate the insertion of a guide wire or connection of a syringe.

In a preferred embodiment, the peritoneal dialysis tube body 40 includes a catheter body 41, a catheter drainage section 42 and a tube tip 43 that are integrally connected in sequence, and the interior of the catheter body 41, the catheter drainage section 42 and the tube tip 43 has a dilator 30 matching continuous cavities. The proximal end of the catheter body 41 has a flat opening for the dilator 30 to penetrate, and the tip of the dilator 30 can be penetrated by the proximal end of the catheter body 41, passing through the catheter body 41 and the back of the catheter drainage section 42 to protrude outside the tube tip 43 , and the peritoneal dialysis tube body 40 can be pushed forward along the length direction of the dilator 30 .

In a preferred embodiment, several side holes 45 are uniformly distributed on the drainage section 42 of the catheter, and the distal section of the drainage section 42 is in a curled shape. Straighten (as shown in FIG. 5 ), and return to the crimped shape (as shown in FIG. 6 ) after the peritoneal dialysis tube body 40 is pushed forward.

In a preferred embodiment, the tube tip 43 is connected to the distal end of the catheter drainage section 42, the tube tip 43 is narrowed and has a certain hardness, and the tube tip 43 matches the tip of the dilator 30 to facilitate breakthrough through the tough anatomical structure.

In a preferred embodiment, the catheter body 41 is made of medical polymer material, which is soft and elastic, and is not easily blocked by bending. Meanwhile, at least one polyester sheath 44 is provided outside the catheter body 41 .

In a preferred embodiment, the peritoneal dialysis tube body 40 can be designed in different shapes as required to be suitable for adults and children, including gooseneck tubes with double polyester sleeves (as shown in FIG. 7 ), straight tubes with double polyester sleeves (as shown in FIG. 7 ). 8), a gooseneck with a single polyester sleeve (as shown in Figure 9) and a straight tube with a single polyester sleeve (as shown in Figure 10).

When inserting the peritoneal dialysis tube of the present utility model by puncture, the patient first undergoes conventional disinfection, spreads sterile towels, local infiltration anesthesia, cuts the skin 1 cm with a scalpel on the abdomen, and then uses a puncture needle 10 obliquely from the skin breach. Puncture in the direction of the pubic symphysis, judge the puncture depth according to the scale mark of the puncture needle 10 and the puncture breakthrough feeling, there is obvious resistance when reaching the peritoneum, when the obvious breakthrough feeling appears, it prompts that the needle tip 13 of the puncture needle 10 enters the abdominal cavity, and the puncture needle 10 enters the abdominal cavity. Put the guide wire 20 into the abdominal cavity at the needle seat 11 of the needle seat 11, pull out the puncture needle 10; assemble the peritoneal dialysis tube body 40 with the dilator 30, and insert it forward along the guide wire 20 (as shown in Figure 5), Expand layer by layer and bring the front part of the peritoneal dialysis tube body 40 into the abdominal cavity; the whole process is protected by a guide wire 20, and after the front part of the peritoneal dialysis tube body 40 enters the abdominal cavity, the guide wire 20 is removed and the dilator 30 is kept still , advance the peritoneal dialysis tube body 40 forward, and now the front section of the peritoneal dialysis tube recovers its crimped shape (as shown in Figure 6), then hold the dilator 30 and the peritoneal dialysis tube body 40 to move forward, and the dilator 30 can be used as a stent Adjust the front section of the peritoneal dialysis tube body 40 into the bladder-rectum fossa, fix the peritoneal dialysis tube body 40, and remove the dilator 30; finally fix the position of the polyester 44 as required, and suture the skin.

The above-mentioned embodiments are only used to illustrate the utility model, wherein the structure, connection mode and manufacturing process of each component can be changed to some extent, and all equivalent transformations and improvements carried out on the basis of the technical solution of the utility model are applicable. It should not be excluded from the protection scope of the present utility model.

Claims (10)

1. a kind of puncture built-in type peritoneum dialysis catheter, which is characterized in that including puncture needle (10), guidance seal wire (20), expander (30) and peritoneal dialysis tube body (40)；

Wherein, guidance seal wire (20) can be threaded through in the inner cavity of the puncture needle (10) or the expander (30), described Expander (30) can be threaded through in the inner cavity of the peritoneal dialysis tube body (40).

2. a kind of puncture built-in type peritoneum dialysis catheter according to claim 1, which is characterized in that the puncture needle (10) is Not damaged body cavity puncture needle, the not damaged body cavity puncture needle include needle stand (11), needle body (12) and needle point (13), and the needle The tip of sharp (13) is round blunt tack.

3. a kind of puncture built-in type peritoneum dialysis catheter according to claim 2, which is characterized in that the needle stand (11), needle The inside of body (12) and needle point (13) has the continuous cavity to match with guidance seal wire (20), the guidance seal wire (20) It can be penetrated by the needle stand (11), be pierced by after passing through the needle body (12) from the needle point (13).

4. a kind of puncture built-in type peritoneum dialysis catheter according to claim 1, which is characterized in that the expander (30) Proximal end connects female Luer, distally has the tip to match with guidance seal wire (20).

5. a kind of puncture built-in type peritoneum dialysis catheter according to claim 1, which is characterized in that the peritoneum dialysis catheter sheet Body (40) includes catheter body (41), catheter drainage section (42) and the tip (43) of successively integrally connected, and the catheter body (41), The inside of catheter drainage section (42) and tip (43) has the continuous cavity to match with the expander (30)；The catheter body (41) proximal end has the flat mouth penetrated for the expander (30), and the tip of the expander (30) can be by the catheter body (41) proximal end penetrates, and sequentially passes through the processus aboralis of the catheter body (41) and catheter drainage section (42) for the tip (43) Outside, and the peritoneal dialysis tube body (40) can be released forward along the length direction of the expander (30).

6. a kind of puncture built-in type peritoneum dialysis catheter according to claim 5, which is characterized in that the catheter drainage section (42) it is uniformly distributed on several side openings (45), distal section is in curly, and the distal section of the catheter drainage section (42) is in the expansion Original state after device (30) is assembled with the peritoneal dialysis tube body (40) is straightened, in the peritoneal dialysis tube body (40) Restore curly after releasing forward.

7. a kind of puncture built-in type peritoneum dialysis catheter according to claim 5, which is characterized in that tip (43) connection In the distal end of the catheter drainage section (42), the tip (43) is in shrinking shape and has a certain degree of hardness, and the tip (43) with The tip of the expander (30) matches.

8. a kind of puncture built-in type peritoneum dialysis catheter according to claim 5, which is characterized in that the catheter body (41) by Medical macromolecular materials are constituted, and are provided at least one terylene set (44) outside the catheter body (41).

9. according to claim 1 to a kind of 8 described in any item puncture built-in type peritoneum dialysis catheters, which is characterized in that the abdomen Film dialysis tube body (40) may be designed as dual-polyester set gooseneck, dual-polyester set straight tube, single terylene set gooseneck or single terylene set Straight tube.

10. a kind of puncture built-in type peritoneum dialysis catheter according to claim 2 or 3, which is characterized in that the needle body (12) Surface and the expander (30) surface have reference mark.