CN220967376U - Disposable abdominal cavity puncture drainage trocar - Google Patents

Abstract

The utility model discloses a disposable abdominal cavity puncture drainage trocar, which comprises a needle head, a drainage tube, a drainage bag, a needle cylinder and a piston rod, wherein the needle head is arranged at the front end of the needle cylinder; the method has the advantages of good safety, simple operation and low cost.

Description

Disposable abdominal cavity puncture drainage trocar

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a disposable abdominal cavity puncture drainage trocar.

Background

Under normal state, a small amount of liquid (generally less than 200 ml) exists in the abdominal cavity of the human body, which has lubricating effect on intestinal peristalsis, but ascites can be generated when diseases such as heart, liver, kidney and the like occur, so that excessive effusion in the abdominal cavity is caused, and the ascites is required to be drained when the etiology is searched for symptomatic treatment in clinic.

The ascites drainage generally adopts a disposable abdominal cavity puncture drainage device as disclosed in patent number ZL200420054814.5 (bulletin No. CN 2756232Y), the structure of the disposable abdominal cavity puncture drainage device comprises an upper drainage tube with a needle at the end part, the upper drainage tube is communicated with a negative pressure drainage device, the negative pressure drainage device is communicated with a lower drainage tube, and the lower drainage tube is communicated with a drainage bag. After the needle head punctures the abdominal cavity of a patient, effusion, air accumulation or blood accumulation in the abdominal cavity enters the drainage bag after passing through the upper drainage tube, the negative pressure drainage device and the lower drainage tube, so that the compression of a large amount of air and liquid in the abdominal cavity on the physiological functions such as inner cavity air tube, respiration and the like is relieved.

In the ascites drainage process, the needle head is used as a part of a drainage structure, a puncture state needs to be kept, but the needle head is very sharp, the risk of scratching the abdominal wall exists, and the safety needs to be improved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a disposable abdominal cavity puncture drainage trocar which is good in safety, simple to operate and low in cost.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a disposable abdominal cavity puncture drainage trocar, includes syringe needle, drainage tube, drainage bag, cylinder and piston rod, the syringe needle sets up the front end of cylinder, the front end of piston rod stretches into in the cylinder and with sliding fit around the cylinder, be provided with on the piston rod along the perforation that the fore-and-aft direction extends, the one end of drainage tube with the notes liquid mouth of drainage bag is connected, the other end of drainage tube passes in proper order the perforation the inside of cylinder stretches into in the syringe needle after, the drainage tube with leave the clearance between the inner wall of syringe needle, the one end of piston rod is provided with around fenestrate first elastic sealing washer, the inner circle of first elastic sealing washer with the lateral surface looks butt of drainage tube.

Preferably, the piston rod comprises a rod body and a second elastic sealing ring, the outer side surface of the rod body is inwards recessed to form an annular groove, the second elastic sealing ring is sleeved at the annular groove, and the outer ring of the second elastic sealing ring extends out of the annular groove and is abutted to the inner side wall of the needle cylinder.

Preferably, the first elastic sealing ring is arranged obliquely from outside to inside and forwards.

Preferably, the outer ring of the first elastic sealing ring protrudes backwards to form a convex ring, n limiting rings are formed by protruding outwards from the outer side surface of the convex ring, n is an integer greater than or equal to 2, n limiting rings are distributed along the front-back direction, n limiting grooves are formed in the inner wall of the through hole, n limiting grooves correspond to n limiting rings one to one, and the limiting rings extend into the corresponding limiting grooves.

Preferably, n is 2, 3 or 4.

Preferably, a one-way valve is arranged in the drainage tube.

Preferably, a clip is arranged on the drainage tube, and the clip is positioned between the piston rod and the drainage bag.

Preferably, a flow rate regulator is arranged on the drainage tube, and the flow rate regulator is positioned between the piston rod and the clip.

Compared with the prior art, the utility model has the advantages that:

1. One end of the drainage tube is arranged in the needle head, after the needle head punctures the abdominal cavity of a patient, the drainage tube is pushed to extend out from the head of the needle head and enter the abdominal cavity, then the needle head is withdrawn, only the end part of the drainage tube is reserved in the abdominal cavity, and accumulated liquid, air and blood in the abdominal cavity can directly enter the drainage bag through the drainage tube, the needle head does not need to keep a puncture state, the drainage tube is soft, the abdominal wall is not scratched, the safety is good, the operation is simple, and the cost is low;

2. By arranging the needle cylinder and the piston rod, after the needle head punctures the abdominal cavity of a patient, medical staff pulls the piston rod to draw liquid, if ascites flows into the needle cylinder through the space between the drainage tube and the inner wall of the needle head, the needle head is accurately punctured into the abdominal cavity, and medical accidents are reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic diagram of a partial cross-sectional structure of the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

fig. 4 is a schematic diagram of a partial cross-sectional structure of the present utility model.

In the figure: 1. a needle; 2. a drainage tube; 3. a drainage bag; 4. a needle cylinder; 5. a piston rod; 51. perforating; 52. a rod body; 521. an annular groove; 53. a second elastic sealing ring; 54. a limit groove; 6. a first elastic sealing ring; 61. a convex ring; 62. a limiting ring; 7. a one-way valve; 8. a clip; 9. a flow rate regulator.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Embodiment one: as shown in fig. 1 to 3, a disposable abdominal cavity puncture drainage trocar comprises a needle head 1, a drainage tube 2, a drainage bag 3, a needle cylinder 4 and a piston rod 5, wherein the needle head 1 is arranged at the front end of the needle cylinder 4, the needle head 1 is communicated with the inside of the needle cylinder 4, the front end of the piston rod 5 stretches into the needle cylinder 4 and is in sliding fit with the needle cylinder 4 back and forth, a perforation 51 extending along the front-back direction is arranged on the piston rod 5, one end of the drainage tube 2 is connected with a liquid injection port of the drainage bag 3, the other end of the drainage tube 2 sequentially penetrates through the perforation 51 and the inside of the needle cylinder 4 and stretches into the needle head 1, a gap is reserved between the drainage tube 2 and the inner wall of the needle head 1, a first elastic sealing ring 6 surrounding the perforation 51 is arranged at one end of the piston rod 5, and the inner ring of the first elastic sealing ring 6 is in butt joint with the outer side surface of the drainage tube 2.

In this embodiment, the piston rod 5 includes a rod body 52 and a second elastic sealing ring 53, the outer side surface of the rod body 52 is recessed inwards to form an annular groove 521, the second elastic sealing ring 53 is sleeved at the annular groove 521, the outer ring of the second elastic sealing ring 53 extends out of the annular groove 521 and abuts against the inner side wall of the syringe 4, and the through hole 51 is disposed at the center position of the rod body 52. Further, an annular groove 521 penetrates the front end face of the rod body 52.

In this embodiment, the first elastic sealing ring 6 is obliquely arranged from outside to inside and forwards, and by obliquely arranging the first elastic sealing ring 6, when the drainage tube 2 is pushed forwards, the elastic force of the first elastic sealing ring 6 acting on the surface of the drainage tube 2 is smaller, and when the drainage tube 2 is pushed backwards, the elastic force of the first elastic sealing ring 6 acting on the surface of the drainage tube 2 is larger, so that the drainage tube 2 can only be pushed forwards. Further, the first elastic sealing ring 6 is arranged in an arc shape.

In the embodiment, the one-way valve 7 is arranged in the drainage tube 2, so that ascites in the abdominal cavity can only flow into the drainage bag 3 through the drainage tube 2, backflow is avoided, and the reliability is good.

In the embodiment, a clip 8 is arranged on the drainage tube 2, and the clip 8 is positioned between the piston rod 5 and the drainage bag 3.

The clip 8 is clamped on the drainage tube 2 at the beginning to enable the inner wall of the drainage tube 2 to be closed, after a medical staff punctures the abdominal cavity of a patient by the needle 1, the piston rod 5 is pulled backwards to pump ascites in the abdominal cavity into the needle cylinder 4, after the needle 1 is confirmed to be correctly punctured, the drainage tube 2 is pushed to extend out of the head of the needle 1 and enter the abdominal cavity, then the needle 1 is withdrawn, only the end part of the drainage tube 2 is reserved to be located in the abdominal cavity, and finally the clip 8 is opened, so that accumulated liquid, accumulated air and accumulated blood in the abdominal cavity directly enter the drainage bag 3 through the drainage tube 2.

Embodiment two: as shown in fig. 4, the other parts are the same as those of the first embodiment, except that the outer ring of the first elastic sealing ring 6 protrudes backward to form a convex ring 61, the outer side surface of the convex ring 61 protrudes outward to form n limiting rings 62, n is an integer greater than or equal to 2, the n limiting rings 62 are distributed along the front-back direction, n limiting grooves 54 are arranged on the inner wall of the through hole 51, the n limiting grooves 54 are in one-to-one correspondence with the n limiting rings 62, and the limiting rings 62 extend into the corresponding limiting grooves 54. Through spacing ring 62 and spacing groove 54 joint cooperation, improve the stability of structural connection, the reliability is better.

In this embodiment, n is 2,3 or 4.

In this embodiment, the first elastic sealing ring 6, the convex ring 61 and the limiting ring 62 are integrally formed and are all made of elastic materials.

Embodiment III: as shown in fig. 1, the rest is the same as the first embodiment, except that a flow rate regulator 9 is arranged on the drainage tube 2, the flow rate regulator 9 is positioned between the piston rod 5 and the clip 8, and the flow rate regulator 9 is used for regulating the tube diameter of the drainage tube 2 so as to control the flow rate of ascites in the drainage tube 2, so that the flexibility is better.

The utility model has been described above by way of example with reference to the accompanying drawings, it is clear that the implementation of the utility model is not limited to the above-described manner, but it is within the scope of the utility model to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted or without any improvement.

Claims (8)

1. The utility model provides a disposable abdominal cavity puncture drainage trocar, includes syringe (1), drainage tube (2) and drainage bag (3), its characterized in that still includes syringe (4) and piston rod (5), syringe (1) set up the front end of syringe (4), the front end of piston rod (5) stretches into in syringe (4) and with sliding fit around syringe (4), be provided with on piston rod (5) along perforation (51) that the fore-and-aft direction extends, the one end of drainage tube (2) with the liquid mouth of annotating of drainage bag (3) is connected, the other end of drainage tube (2) passes in proper order perforation (51) stretch into behind the inside of syringe (4) in syringe (1), leave the clearance between the inner wall of drainage tube (2) with piston rod (5) one end be provided with encircle perforation (51) first elastic seal circle (6), first elastic seal circle (6) with the outside face of drainage tube (2) offset.

2. The disposable abdominal cavity puncture drainage trocar according to claim 1, characterized in that the piston rod (5) comprises a rod body (52) and a second elastic sealing ring (53), an annular groove (521) is formed by inward recessing of the outer side surface of the rod body (52), the second elastic sealing ring (53) is sleeved at the annular groove (521), and the outer ring of the second elastic sealing ring (53) extends out of the annular groove (521) and is abutted against the inner side wall of the syringe (4).

3. A disposable laparoscopic drainage trocar according to claim 1, characterized in that said first elastic sealing ring (6) is arranged inclined from the outside to the inside and forward.

4. The disposable abdominal cavity puncture drainage trocar according to claim 3, wherein the outer ring of the first elastic sealing ring (6) protrudes backwards to form a convex ring (61), n limiting rings (62) are formed on the outer side surface of the convex ring (61) in a protruding mode, n is an integer greater than or equal to 2, n limiting rings (62) are distributed along the front-back direction, n limiting grooves (54) are formed in the inner wall of the through hole (51), n limiting grooves (54) are in one-to-one correspondence with n limiting rings (62), and the limiting rings (62) extend into the corresponding limiting grooves (54).

5. A disposable laparoscopic drainage trocar according to claim 4, wherein n is 2, 3 or 4.

6. A disposable laparoscopic drainage trocar according to claim 1, characterized in that a one-way valve (7) is provided in the drainage tube (2).

7. A disposable laparoscope puncture drainage trocar according to claim 1, characterized in that a clip (8) is provided on the drainage tube (2), said clip (8) being located between the piston rod (5) and the drainage bag (3).

8. A disposable laparoscopic drainage trocar according to claim 7, characterized in that a flow regulator (9) is provided on the drainage tube (2), said flow regulator (9) being located between the piston rod (5) and the clip (8).