Integrally-formed interventional catheter

Abstract

The utility model relates to the technical field of medical instruments, and discloses an integrally formed interventional catheter which comprises a catheter seat, a metal lantern ring is fixedly connected in the catheter seat, second holes which are evenly distributed are formed in the outer wall of the metal lantern ring, a stress relief tube is fixedly connected to the bottom of the catheter seat, and the stress relief tube is fixedly connected to the outer wall of the metal lantern ring. First holes which are uniformly distributed are formed in the outer wall of the metal lantern ring, a first connecting piece is fixedly connected to the front end of the stress relieving pipe, an extension pipe is fixedly connected to the front end of the first connecting piece, a feeding pipe is fixedly connected to the top of the guide pipe seat, and a limiting ring is fixedly connected to the outer wall of the feeding pipe; an adjusting assembly is arranged on the outer wall of the feeding pipe, and a pressing plate is fixedly connected to the outer wall of the guide pipe base. According to the utility model, the catheter body and the catheter seat are quickly fixed in an integral injection molding manner, so that the product performance is improved, the processing procedures are reduced, and batch production is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an integrally formed interventional catheter. Background Art

[0002] The catheter is a commonly used medical device in interventional surgery. It is inserted into the corresponding lesion area to establish a channel between the outside and the body, making it easier for other instruments to be delivered to the lesion area.

[0003] During the assembly and molding process of the catheter body and the catheter seat, the catheter body and the catheter seat are often fixed by glue bonding, rivet pin fixing, and thread or buckle assembly fixing, but these processing forms all have certain defects. Glue bonding is currently a common fixing method for the tube body and the catheter seat, but there is a problem of glue shrinkage, resulting in insufficient bonding force after sterilization and aging.

[0004] In view of the above problems, an integrally formed interventional catheter is proposed. Utility Model Content

[0005] The utility model aims to provide an integrally formed interventional catheter, which solves the problem of the risk of the bottom part being loose or falling off in the background art.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an integrally formed interventional catheter, comprising a catheter seat, a metal collar fixedly connected to the interior of the catheter seat, an outer wall of the metal collar being provided with evenly distributed second holes, a stress relief tube fixedly connected to the bottom of the catheter seat, an outer wall of the metal collar being provided with evenly distributed first holes, a first connecting piece fixedly connected to the front end of the stress relief tube, an extension tube fixedly connected to the front end of the first connecting piece, a feed pipe fixedly connected to the top of the catheter seat, a limiting ring fixedly connected to the outer wall of the feed pipe, an adjustment assembly provided on the outer wall of the feed pipe, and a pressure plate fixedly connected to the outer wall of the catheter seat.

[0007] By adopting the above technical solution, the length of the catheter can be increased by setting an extension tube, thereby avoiding the situation where the catheter is not long enough during use. The position of the catheter seat can be limited by setting a pressure plate, thereby avoiding the situation where the catheter seat rotates during use.

[0008] As a further description of the above technical solution: the adjustment component includes a second connecting piece, and the second connecting piece passes through the feed pipe and is threadedly connected.

[0009] By adopting the above technical solution, the second connecting piece and the feeding pipe are threadedly connected, which is convenient for replacement during the dosing process.

[0010] As a further description of the above technical solution: one end of the second connecting member is fixedly connected to a feeding pipe, the front end of the feeding pipe is fixedly connected to a third connecting member, and the front end of the third connecting member is fixedly connected to a regulating valve.

[0011] By adopting the above technical solution, the feed pipe and the filling pipe are connected through the second connecting piece, and the amount of medicine fed is controlled by setting a regulating valve.

[0012] As a further description of the above technical solution: an adjusting button is provided on the outer wall of the regulating valve, and a feeding pipe penetrates and is fixedly connected to the top of the regulating valve.

[0013] By adopting the above technical solution, the regulating valve is controlled by setting the regulating button, and material can be added through the feeding pipe.

[0014] As a further description of the above technical solution: the outer layer material of the feeding tube and the extension tube is PA, Pebax, PE, PVC or PU, and the material of the stress relief tube is PC, PE, PA, PU, ​​Pebax or PVC.

[0015] By adopting the above technical solution, the outer diameter of the filling tube, extension tube and stress relief tube is 1.0mm, the outermost layer material is Pebax, the rubber material is PA, the outer diameter of the tube is 5.0mm, the outermost layer material is PVC, the rubber material is PVC, the outer diameter of the tube is 14.0mm, the outermost layer material is PE, and the rubber material is PE.

[0016] As a further description of the above technical solution: the material of the metal ring is stainless steel, platinum-iridium alloy or gold.

[0017] By adopting the above technical solution and providing the metal ring, the strength of the catheter seat can be enhanced during use.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] 1. The utility model provides an integrated interventional catheter, which firstly quickly fixes the catheter body and the catheter seat by integrated injection molding, thereby improving product performance while reducing processing steps and facilitating mass production.

[0020] 2. The utility model provides an integrally formed interventional catheter, which can lengthen the catheter during use through the linkage between the feeding tube, the adjusting button, the adjusting valve, the third connecting piece, the feeding tube, the feeding tube, the second connecting piece, the first connecting piece and the extension tube. At the same time, it can add medicine during use and adjust the amount of medicine during the adding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the expanded pipe body of the utility model;

[0023] Figure 3 This is a schematic diagram of the tube body punching of the utility model;

[0024] Figure 4 This is a schematic diagram of the installation of the catheter seat of the utility model;

[0025] Figure 5 for Figure 4 Cross-sectional view of .

[0026] In the figure: 1, first hole; 2, metal ring; 3, stress relief tube; 4, second hole; 5, catheter seat; 6, extension tube; 7, first connecting piece; 8, pressure plate; 9, limit ring; 10, feed pipe; 11, second connecting piece; 12, feeding pipe; 13, adjusting button; 14, regulating valve; 15, third connecting piece; 16, feeding pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0029] Combination Figure 1-5 The utility model is an integrated interventional catheter, comprising a catheter seat 5, a metal collar 2 is fixedly connected inside the catheter seat 5, the material of the metal collar 2 is stainless steel, platinum-iridium alloy or gold, the outer wall of the metal collar 2 is provided with uniformly distributed second holes 4, a stress relief tube 3 is fixedly connected to the bottom of the catheter seat 5, the material of the stress relief tube 3 is PC, PE, PA, PU, ​​Pebax or PVC, the outer wall of the metal collar 2 is provided with uniformly distributed first holes 1, the front end of the stress relief tube 3 is fixedly connected to a first connecting piece 7, the front end of the first connecting piece 7 is fixedly connected to an extension tube 6, a feed pipe 10 is fixedly connected to the top of the catheter seat 5, a limiting ring 9 is fixedly connected to the outer wall of the feed pipe 10, an adjustment component is provided on the outer wall of the feed pipe 10, and a pressing plate 8 is fixedly connected to the outer wall of the catheter seat 5;

[0030] The material of the expansion tool is 304 stainless steel or copper, the angle range of the bevel part is 10° to 60°, the temperature range of the expansion process is 90°C to 180°C, the expansion time is 3s to 10s, and the rubber material is PE, PC, ABS, PU, ​​PVC, PA or Pebax.

[0031] Combination Figure 1 The regulating component includes a second connecting member 11, which passes through the feeding pipe 10 and is threadedly connected. One end of the second connecting member 11 is fixedly connected to a feeding pipe 16, and the second connecting member 11 is used to connect the feeding pipe 10 and the feeding pipe 16. The front end of the feeding pipe 16 is fixedly connected to a third connecting member 15, and the front end of the third connecting member 15 is fixedly connected to a regulating valve 14. The outer wall of the regulating valve 14 is provided with an adjusting button 13, and the adjusting button 3 is used to adjust the amount of other drugs added during use. The top of the regulating valve 14 passes through and is fixedly connected to a feeding pipe 12, and drugs can be added during use through the feeding pipe 12. The outer layer material of the feeding pipe 16 and the extension pipe 6 is PA, Pebax, PE, PVC or PU, the material of the stress relief pipe 3 is PC, PE, PA, PU, ​​Pebax or PVC, and the material of the metal ring 2 is stainless steel, platinum-iridium alloy or gold;

[0032] The outer diameter of the tube is 1.0mm, the outermost layer is Pebax, the rubber material is PA, the drying temperature of the rubber is (80±5)℃, the injection pressure of the rubber is (40±5)Mpa, the injection speed of the rubber is (10±5)mm / s, the melting temperature of the rubber is (280±10)℃, the number of holes is 3, the hole diameter is 0.2mm, the outer diameter of the tube is 5.0mm, the outermost layer is PVC, the rubber material is PVC, the drying temperature of the rubber is (80±5)℃, the injection pressure of the rubber is (60±5 )Mpa, injection speed of rubber is (25±5)mm / s, melt temperature of rubber is (210±10)℃, the number of holes is 4, the hole diameter is 0.5mm, the outer diameter of the tube is 14.0mm, the outermost layer material is PE, the rubber material is PE, the drying temperature of the rubber is (75±5)℃, the injection pressure of the rubber is (30±5)Mpa, the injection speed of the rubber is (15±5)mm / s, the melt temperature of the rubber is (220±10)℃, the number of holes is 4 (in two rows), and the hole diameter is 2mm.

[0033] Working principle: first, the stress relief tube 3 connected to the catheter seat 5 is punched, the number of holes is ≥2, and they are distributed in a circle. Then, the punched stress relief tube 3 is expanded, the number of holes is ≥2, and they are arranged symmetrically in a circle. The hole diameter is (0.1-2) mm, and a metal ring 2 is inserted into the expanded area to make it trumpet-shaped. The material of the expansion tool is 304 stainless steel or copper, and the angle range of the oblique part is 10° to 60°. At the same time, the temperature range of the expansion process is 90°C-180°C, and the expansion time is 3s-10s. The component inserted into the metal ring 2, the material of the metal ring 2 is stainless steel, platinum-iridium alloy or gold, is inserted into the catheter. The core shaft in the tube seat 5 mold is pushed in until it can no longer be pushed, the injection molding machine is molded, the rubber material is extruded and injected into the catheter seat 5 mold, and the tube body and the catheter seat (5) are integrally molded. The molding drying temperature of the catheter seat is: (60-100) ° C; the injection pressure is: (20-70) MPa; the injection speed is: (5-40) mm / s; the melt temperature is: (180-300) ° C; the screw is a standard screw, and the straight-through nozzle is. After the integral molding is completed, the mold is opened, the product is taken out, and the excess material is cut off. After the tube body and the catheter seat 5 are integrally molded, the stress relief tube 3 of the catheter seat is installed, and the tube body is subjected to hydrophilic coating and head end molding, and the assembly of the interventional catheter is completed.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrally formed interventional catheter, comprising a catheter seat (5), characterized in that: The interior of the catheter seat (5) is fixedly connected to a metal collar (2), the outer wall of the metal collar (2) is provided with evenly distributed second holes (4), the bottom of the catheter seat (5) is fixedly connected to a stress relief tube (3), the outer wall of the metal collar (2) is provided with evenly distributed first holes (1), the front end of the stress relief tube (3) is fixedly connected to a first connecting piece (7), the front end of the first connecting piece (7) is fixedly connected to an extension tube (6), the top of the catheter seat (5) is fixedly connected to a feed pipe (10), the outer wall of the feed pipe (10) is fixedly connected to a limit ring (9), the outer wall of the feed pipe (10) is provided with an adjustment component, and the outer wall of the catheter seat (5) is fixedly connected to a pressure plate (8).

2. The one-piece interventional catheter according to claim 1, characterized in that: The adjustment assembly comprises a second connecting piece (11), which passes through the feed pipe (10) and is threadedly connected.

3. The one-piece interventional catheter according to claim 2, characterized in that: One end of the second connecting member (11) is fixedly connected to a feeding pipe (16), a front end of the feeding pipe (16) is fixedly connected to a third connecting member (15), and a front end of the third connecting member (15) is fixedly connected to a regulating valve (14).

4. The one-piece interventional catheter according to claim 3, characterized in that: An adjusting button (13) is provided on the outer wall of the adjusting valve (14), and a feeding pipe (12) penetrates and is fixedly connected to the top of the adjusting valve (14).

5. The one-piece interventional catheter according to claim 3, characterized in that: The outer layer material of the feeding tube (16) and the extension tube (6) is PA, Pebax, PE, PVC or PU, and the material of the stress relief tube (3) is PC, PE, PA, PU, ​​Pebax or PVC.

6. The one-piece interventional catheter according to claim 1, characterized in that: The material of the metal ring (2) is stainless steel, platinum-iridium alloy or gold.

Images