Drainage catheter

Abstract

The utility model discloses a drainage catheter, which at least comprises a catheter fixing seat, a main tube, an auxiliary tube, a pull wire and a pull wire fixing mechanism, and the pull wire fixing mechanism at least comprises an annular groove, a fastener and a clamping part. The annular groove is formed in the catheter fixing seat, one end of the buckling piece is located in the annular groove and hinged to the catheter fixing seat, a clamping hook is arranged at the other end of the buckling piece, a through hole is formed in the middle of the buckling piece, the buckling piece is in interference fit with the annular groove, and the clamping part is connected with the clamping hook in a matched and clamped mode and located on the side, opposite to the hinged position, of the annular groove. The pull wire of the structure penetrates out of the conduit fixing seat and then penetrates out of the through hole of the buckle piece through the wall face of the annular groove, and then the buckle piece and the clamping part are clamped to fix the pull wire. The buckling piece not only provides pressing force in the direction perpendicular to the bottom of the annular groove, but also provides pressing force in the direction perpendicular to the two side wall faces of the annular groove, the structure is simple, operation is easy, the locking effect is good, and the pull wire cannot relatively slide.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a drainage catheter. Background Art

[0002] In the prior art, a drainage catheter is commonly used in surgery. During surgery, the catheter is placed into the pleural cavities of tissues such as the chest, abdomen, and pericardial cavity under the guidance of imaging equipment such as B-ultrasound, X-ray, and CT to drain and perfuse or flush the cavity. The end of this type of catheter that extends into the body can curl naturally, and because it forms a pigtail after curling, it is commonly known as a pigtail catheter. Curling can effectively prevent the catheter from slipping out of the entrance and thus out of the body cavity, and can also prevent displacement of the tube body, reducing the occurrence of complications.

[0003] The above-mentioned type of drainage catheter includes a catheter body, a retractable section disposed at the distal end of the catheter body, and a tube seat disposed at the proximal end of the catheter body. Usually, it also includes a traction line, one end of which is fixed to the retractable section, and the other end of which extends out of the tube seat after passing through the catheter body from the retractable section. A traction line fixing mechanism is usually provided on one side of the tube seat. After the other end of the traction line is fixed by the traction line fixing mechanism, the retractable section is kept in a specific retracted state.

[0004] The drainage catheter with a traction line can curl and lock the tail end of the catheter and adjust the curvature, making it more suitable for drainage in multiple sites of surgery. It has excellent adaptability. When the locking line is fixed by the traction line fixing mechanism, the drainage tube is not easy to fall out even if the patient moves.

[0005] The Chinese utility model with announcement number CN517448684U discloses a locking type drainage catheter, including a tube seat, a locking wire and a drainage catheter fixed on the tube seat. The tube seat is also provided with a locking block and a pressing block. One end of the locking wire is fixedly connected to the locking block, and the other end bypasses the end of the drainage catheter and then returns again, passing through a small hole on the pressing block. Protrusions are provided on the two wall surfaces of the pressing block, and the locking wire is tightened by the cooperation between the protrusions and the stop groove in the groove.

[0006] The locking drainage catheter disclosed in the above patent has the following technical defects:

[0007] (1) After the drainage catheter is bent and deformed by the locking wire, there is elastic force, and the locking wire is very thin. It is difficult to lock the locking wire only by pressing the pressing block. The locking wire needs to be wound, and then the free end of the locking wire is pressed by the pressing block to fix the locking wire. The operation is cumbersome and the portability is poor.

[0008] (2) There are protrusions on the two walls of the pressing block. The locking wire is pressed by the cooperation between the protrusions and the stop grooves in the groove. There is a large gap between the pressing block and the wall of the groove, and it is impossible to apply vertical wall pressure to the locking wire on the wall, resulting in a poor locking effect.

[0009] (3) The locking wire is inserted back and forth in the drainage catheter, and the structure is complicated, which not only increases the difficulty of assembly during the manufacturing process, but also makes the locking wire easily entangled in the drainage catheter, resulting in poor reliability. Summary of the invention

[0010] The technical problem to be solved by the utility model is to provide a drainage catheter with a simple structure, easy operation of locking and unlocking a traction line, and good traction line locking effect.

[0011] In order to solve the above technical problems, the utility model provides a technical solution, a drainage catheter, comprising:

[0012] Catheter fixing seat;

[0013] A main pipe, the proximal end of which is fixedly connected to the catheter fixing pipe;

[0014] A naturally bendable secondary tube, the secondary tube being connected to the distal end of the primary tube;

[0015] A traction line, one end of which is fixedly connected to a position of the auxiliary tube near the distal end, and the other end of which passes through the distal end of the main tube and passes through the catheter fixing seat;

[0016] A traction line fixing mechanism, the traction line fixing mechanism at least comprising:

[0017] An annular groove, the annular groove is arranged around the catheter fixing seat;

[0018] A clip, one end of which is located in the annular groove and hinged to the catheter fixing seat, a hook is provided at one end of the clip away from the hinged position, and a through hole for accommodating the traction line to pass through is also provided on the clip, the through hole is located between the hinged position and the hook and passes through the clip, and the clip and the annular groove are in interference fit;

[0019] The engaging portion is used for engaging with the hook, and the engaging portion is located on a side of the annular groove opposite to the hinge position.

[0020] In a preferred embodiment, the free end of the traction line passes around the proximal side of the buckle and then passes through the through hole.

[0021] In a preferred embodiment, the free end of the traction line passes through the through hole along a side surface of the buckle away from the annular groove and around the proximal side of the buckle.

[0022] In a preferred embodiment, the free end of the traction line passes along a side surface of the buckle close to the annular groove and around the proximal side of the buckle before passing through the through hole.

[0023] In a preferred embodiment, the buckle comprises a hinge portion located at a hinge position, the hinge portion is provided with a hinge hole, and a rotating shaft adapted to be connected to the hinge hole is provided in the annular groove.

[0024] In a preferred embodiment, the fastener also includes a middle portion located between the hinge portion and the hook and abutting against the bottom of the annular groove, and the through hole is located on the middle portion.

[0025] In a preferred embodiment, a convex portion extending outward from the middle portion is provided at a connection position between the hook and the middle portion.

[0026] In a preferred embodiment, the free end of the hook is provided with a pressing surface extending from the top end toward the engaging portion, and a pressing groove is formed between the pressing surface and the surface of the engaging portion.

[0027] In a preferred embodiment, one end of the catheter fixing seat close to the main pipe is provided with a through hole for the traction line to pass through the catheter fixing seat.

[0028] In a preferred embodiment, a drainage channel is provided in the catheter fixing seat, and the through hole is connected to the drainage channel.

[0029] Compared with the prior art, the drainage catheter of the utility model has the following beneficial effects:

[0030] (1) The traction line fixing mechanism includes an annular groove arranged on the catheter fixing seat, a clip with one end located in the annular groove and hinged to the catheter fixing seat, and a clamping part located in the annular groove and adapted to the hook of the clip. The clip and the annular groove are in interference fit. The clip is provided with a through hole for the traction line to pass through. The traction line passing through the catheter fixing seat passes through the wall of the annular groove and passes through the through hole of the clip. Then, the clip and the clamping part are clamped to lock the traction line. The clip not only provides a clamping force in the direction perpendicular to the bottom of the annular groove, but also provides a clamping force in the direction perpendicular to the wall surfaces on both sides of the annular groove. The structure is simple, the locking effect is better, and the traction line will not slide relative to each other.

[0031] (2) The assembly position of the traction wire is that the free end of the traction wire passes through the catheter fixing seat, bypasses the proximal side of the clip and then passes through the self-perforation. When performing the traction wire locking operation, the traction wire can be easily pulled, and the traction wire will be adaptively wound around the clip to lock the bending state of the auxiliary tube, and then the clip can be pressed to fix it. There is no need to perform the winding operation, which is easy to operate and has a good user experience.

[0032] (3) A convex portion extending outward from the middle portion is provided at the connection position between the hook and the middle portion. The connection between the hook and the engaging portion can be released by pressing the convex portion with a finger without the aid of any tool. The traction line is automatically unlocked under the action of the elastic force at the tail of the drainage catheter, and the unlocking operation is fast and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the overall assembly of a drainage catheter embodiment of the utility model;

[0034] Figure 2 It is a structural schematic diagram of a catheter fixing seat of a drainage catheter embodiment of the utility model;

[0035] Figure 3 A cross-sectional view of a catheter fixing seat of a drainage catheter embodiment of the utility model;

[0036] Figure 4 It is a structural schematic diagram of a clip member of a drainage catheter embodiment of the utility model;

[0037] Figure 5 It is a cross-sectional view of a clamping member and a clamping portion of a drainage catheter embodiment of the utility model being clamped together.

[0038] Figure 6 It is a cross-sectional view of the clamping member and the clamping part of another embodiment of a drainage catheter of the present invention.

[0039] Explanation of the reference numerals: 1-catheter fixing seat, 11-groove, 12-through hole, 13-drainage channel, 14-threaded joint, 15-Luer joint, 2-main pipe, 21-traction line inlet, 3-auxiliary pipe, 31-side hole, 4-traction line, 5-traction line fixing mechanism, 51-annular groove, 511-rotating shaft, 52-fastener, 521-hook, 522-perforation, 523-hinge hole, 524-hinge part, 525-middle part, 526-pressing surface, 527-convex part, 53-engaging part, 54-pressing groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the description of the present invention, it should be noted that the term "proximal end" refers to the end close to the operator, and the term "distal end" refers to the end close to the patient (far away from the operator).

[0044] A drainage catheter of this embodiment, such as Figure 1 As shown, it includes a catheter fixing seat 1, a main pipe 2, a secondary pipe 3, a traction line 4 and a traction line fixing mechanism 5 arranged on the catheter fixing seat. The proximal end of the main pipe 2 is fixedly connected to the catheter fixing seat 1. In this embodiment, the proximal end of the main pipe 2 is fixedly connected to the catheter fixing seat 1 by a thread, as shown in FIG. Figure 2 As shown, a threaded joint 14 is provided at the connection position between the catheter fixing seat and the main pipe, and a Luer joint 15 connected to other devices is provided at the other end of the catheter fixing seat. The auxiliary pipe 3 is fixedly connected to the distal end of the main pipe, wherein the auxiliary pipe 3 can be naturally bent, and a plurality of side holes 31 for fluid inflow are provided on the auxiliary pipe, and the auxiliary pipe is fixedly connected to the traction line near the distal end.

[0045] The other end of the traction wire passes through the distal end of the main pipe 2 and passes through the catheter fixing seat 1. The main pipe is provided with a traction wire inlet 21 for accommodating the passage of the traction wire. Figure 2 As shown, a groove 11 is provided at one end of the catheter fixing seat close to the main pipe, and a through hole 12 for the traction line to pass through is provided at the bottom of the groove. Figure 3 As shown, a drainage channel 13 is provided in the catheter fixing seat, and the through hole is connected to the drainage channel.

[0046] The traction line fixing mechanism is arranged on the guide rail fixing seat, such as Figure 2 As shown, the traction line fixing mechanism includes a buckle 52 and an annular groove 51 arranged on the guide rail fixing seat 1 for accommodating the buckle, a rotating shaft 511 is arranged between the two side walls of the annular groove, the buckle is hinged to the catheter fixing seat through the rotating shaft, the buckle can rotate freely around the rotating shaft, and the free end of the buckle has a state of being rotatably embedded in the annular groove and a state of being located outside the annular groove. Figure 2 In the embodiment, the buckle is in state 2. As a special feature of this embodiment, the two side walls of the annular groove are interference fit with the buckle, and a clamping portion 53 is provided at the bottom of the annular groove, and the clamping portion is located on the side opposite to the hinge position.

[0047] like Figure 4 As shown, the buckle comprises a hinged portion 524 hinged to the catheter fixing seat 1 through a rotating shaft, a hook 521 for connecting the buckle to the engaging portion in the annular groove, and a middle portion 525 located between the hook and the hinged portion and abutting against the bottom of the annular groove, and a hinged hole 523 adapted to the rotating shaft is provided on the hinged portion. A through hole 522 for the traction line to pass through the buckle is provided in the middle portion, and a pressing surface 526 is provided at the position where the hook contacts the engaging portion.

[0048] like Figure 1 As shown, in this embodiment, after the free end of the traction line passes through the through hole from the catheter fixing seat, it goes along the side surface of the buckle away from the annular groove, then bypasses the proximal side of the buckle, and passes through the buckle from the through hole. During operation, it is only necessary to tighten the traction line, and the traction line will adaptively wrap around the buckle, while putting the auxiliary tube in a natural bending state. Press the buckle to put the buckle in state one to fix the traction line.

[0049] Another implementation of the traction line is that the free end of the traction line passes through the through hole from the catheter fixing seat, along the side surface of the buckle close to the annular groove, then bypasses the proximal side of the buckle, and passes through the buckle from the through hole. During operation, it is only necessary to tighten the traction line, and the traction line will adaptively wrap around the buckle, while putting the auxiliary tube in a natural bending state. Press the buckle to put the buckle in state one, and fix the traction line.

[0050] like Figure 5 As shown, when the fastener is in state one, the free end of the hook is provided with a pressing surface 526 extending from the top end toward the engaging portion, and there is a pressing groove 54 between the pressing surface of the hook and the engaging portion. The connection between the hook and the engaging portion can be released by simply putting a finger into the pressing groove and rotating the fastener in the opposite direction without the aid of any tools, and the traction line is automatically unlocked under the action of the elastic force at the tail end of the drainage catheter.

[0051] like Figure 6As shown, as a preferred embodiment, in another embodiment of the fastener, a protrusion 527 extending outward from the middle part is provided at the connection position between the hook and the middle part. No tools are needed, and the connection between the hook and the engaging part can be released by pressing the protrusion with fingers. The traction line is automatically unlocked under the action of the elastic force at the tail end of the drainage catheter.

[0052] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drainage catheter, comprising at least: A catheter fixing seat (1); A main pipe (2), the proximal end of which is fixedly connected to the catheter fixing seat; A naturally bendable secondary tube (3), the secondary tube being connected to the distal end of the primary tube; A traction line (4), one end of which is fixedly connected to a position of the auxiliary tube near the distal end, and the other end of which passes through the distal end of the main tube and out of the catheter fixing seat; The invention is characterized in that it further comprises a traction line fixing mechanism (5), wherein the traction line fixing mechanism at least comprises: an annular groove (51), the annular groove being arranged circumferentially on the catheter fixing seat; A buckle (52), one end of which is located in the annular groove and is hinged to the catheter fixing seat, a hook (521) is provided at one end of the buckle away from the hinged position, and a through hole (522) is also provided on the buckle for accommodating the traction line to pass through, the through hole is located between the hinged position and the hook and passes through the buckle, and the buckle and the annular groove are in an interference fit; A snap-fitting portion (53) is used for snap-fitting with the snap hook, and the snap-fitting portion is located on a side of the annular groove opposite to the hinge position.

2. A drainage catheter according to claim 1, characterized in that: The free end of the pulling line passes around the proximal side of the buckle and then passes through the through hole.

3. A drainage catheter according to claim 2, characterized in that: The free end of the pulling wire passes through the through hole along a side surface of the buckle away from the annular groove and around the proximal side of the buckle.

4. A drainage catheter according to claim 2, characterized in that: The free end of the pulling line passes through the through hole along a side surface of the buckle close to the annular groove and around the proximal side of the buckle.

5. A drainage catheter according to claim 1, characterized in that: The buckle comprises a hinge portion (524) located at a hinge position, the hinge portion is provided with a hinge hole (523), and a rotating shaft (511) adapted to be connected to the hinge hole is provided in the annular groove.

6. A drainage catheter according to claim 5, characterized in that: The buckle also includes a middle portion (525) located between the hinge portion and the hook and abutting against the bottom of the annular groove, and the through hole is located on the middle portion.

7. A drainage catheter according to claim 6, characterized in that: A convex portion (527) extending outward from the middle portion is provided at the connection position between the hook and the middle portion.

8. A drainage catheter according to claim 1, characterized in that: The free end of the hook is provided with a pressing surface (526) extending from the top end toward the locking portion, and a pressing groove (54) is formed between the pressing surface and the surface of the locking portion.

9. A drainage catheter according to any one of claims 1 to 8, characterized in that: A through hole (12) is provided at one end of the catheter fixing seat close to the main pipe for the traction wire to pass through the catheter fixing seat.

10. A drainage catheter according to claim 9, characterized in that: A drainage channel (13) is provided in the catheter fixing seat, and the through hole is connected to the drainage channel.

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