Catheter device for conveying liquid medicine into body

Abstract

The utility model provides a catheter device for delivering liquid medicine into the body, which comprises a catheter and an operating handle, at least one medicine delivery hose is arranged in the operating handle, one end of the catheter is communicated with the medicine delivery hose, the other end of the medicine delivery hose is communicated with a medicine delivery device, the other end of the catheter extends out of the operating handle, and the operating handle is connected with the catheter. A plurality of steering metal wires are arranged in one end, far away from the operating handle, of the catheter, a steel wire channel is formed in the catheter, the steering metal wires penetrate through the steel wire channel and extend into the operating handle, an operating knob is arranged in the operating handle, and the steering metal wires are arranged in the operating knob. The ends, away from the catheter, of the steering metal wires are symmetrically connected to the two sides of the operation knob, a tooth-shaped structure is arranged on the circumferential face of the operation knob, and a gear ring is arranged on the inner wall of the operation handle. The operation knob is locked by meshing the tooth-shaped structure and the gear ring instead of manual operation, so that the operation difficulty is reduced, and the operation precision is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a catheter device for conveying liquid medicine into the body. Background Art

[0002] Neurolysis technology refers to a treatment method that involves injecting phenol or ethanol into nerve trunks or muscle motor points, causing degeneration of the nerve sheath or axonal cell membrane, or coagulation and degeneration of muscle protein, thereby reducing local muscle-nerve activity. This surgical method involves determining a small hole leading to the body in the coccyx part of the spine, inserting a catheter into the small hole, and injecting medicine through the catheter to remove necrotic nerve tissue of the central nervous system and nerve branches at the front end of the catheter, or to remove inflammation-inducing substances and adhesions.

[0003] Patent No. "CN206852894U" discloses "Epidural Catheter and Epidural Puncture Device Using the Same", the rear end of which is provided with a drug injection hole, the front end is a closed end, and a drug outlet hole is provided on the catheter wall near the closed end. The closed end is located at the epidural channel. This patent can only deliver drugs into the body through the epidural catheter, but cannot further adjust the front end of the catheter.

[0004] Since injection requires exploration of the best location for targeted injection, a bendable and adjustable catheter device is often used to deliver the drug solution to the lesion. However, existing catheter devices require doctors to manually maintain the bending angle of the catheter. During the operation, it is very tiring to keep the angle unchanged and hold the operating knob of the catheter device all the time. There are even situations where precise operation cannot be performed due to the need to grasp the operating knob. This has the disadvantages of poor surgical accuracy and inconvenience in use.

[0005] Therefore, there is an urgent need to design a catheter device that can be easily operated. Utility Model Content

[0006] In view of the deficiencies of the prior art, the purpose of the utility model is to solve the problem that the catheter device of the prior art needs to manually maintain the catheter bending angle, which is difficult to operate and even affects the precise operation, resulting in poor surgical accuracy.

[0007] The technical solution of the utility model is:

[0008] A catheter device for delivering liquid medicine into the body, comprising a connected catheter and an operating handle, wherein at least one medicine delivery hose is arranged in the operating handle, one end of the catheter is connected to the medicine delivery hose, the other end of the medicine delivery hose is connected to a drug delivery device, the other end of the catheter extends out of the operating handle, at least two steering wires are arranged in the catheter, a steel wire channel is arranged in the catheter, the steering wire passes through the steel wire channel and extends into the interior of the operating handle, an operating knob is arranged in the operating handle, one end of the steering wire away from the catheter is symmetrically connected to both sides of the operating knob, a toothed structure is arranged on the circumferential surface of the operating knob, a gear ring is arranged on the inner wall of the operating handle, and when the operating knob is pressed down, the toothed structure meshes with the gear ring. The bending angle of the catheter tip is fixed.

[0009] Preferably, the locking button is also included, and the operating handle is provided with a locking hole for the locking button to pass through. The locking button includes a pressing portion and a rod portion, and the pressing portion is located outside the operating handle. The rod portion passes through the locking hole and is connected to the operating knob. A locking ring is provided on the side of the rod portion. When the locking button is pressed, the locking ring and the locking hole are interference fit. The locking button further assists in fixing. The angle can be adjusted by opening the locking button, and the angle is fixed at a certain angle by pressing the locking button.

[0010] Preferably, a wire fixing seat is provided at one end of the steering wire close to the operating knob, a wire guide clamp is symmetrically provided on the operating knob, and the wire fixing seat is fixedly connected to the wire guide clamp.

[0011] Preferably, the operating handle includes an upper shell and a lower shell, the upper shell and the lower shell are covered to form a placement cavity, the operating knob is placed in the cavity, and a first rotating shaft is provided at one end of the operating knob close to the lower shell, the first rotating shaft is hollow inside, and a second rotating shaft is provided on the inner side of the lower shell, the second rotating shaft is embedded in the first rotating shaft, and the first rotating shaft and the second rotating shaft are provided with a through groove along the axis normal to the axis for the medicine delivery hose to pass through.

[0012] Preferably, the operating knob is provided with an operating ear, and both sides of the operating handle are provided with travel windows for the operating ear to extend and move.

[0013] Preferably, the medication device is provided with a fixing block on the side of one end close to the medication delivery hose, the operating handle is provided with a fixing groove, the fixing block is embedded in the fixing groove, and the branch pipe of the medication device and the end away from the medication delivery hose extend out of the operating handle.

[0014] Preferably, the tip of the catheter is provided with a balloon, which can be a balloon structure in the prior art and is inflated.

[0015] Preferably, the catheter is provided with an air delivery channel connected to the balloon, and the operating handle is provided with an air delivery hose and an air delivery device. The balloon structure can further assist the smooth progress of the operation.

[0016] Preferably, a connector is provided between the catheter and the medicine delivery hose and / or the gas delivery hose, one end of the connector is connected to the catheter, and the other end of the connector is connected to at least one medicine delivery hose.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The utility model designs a catheter device for delivering liquid medicine into the body, comprising a catheter, an operating handle, a medicine delivery hose, a metal wire, an operating handle and an operating knob, etc. By meshing a toothed structure on the operating knob with a gear ring inside the operating handle, the operating knob is fixed manually instead of being manually controlled by an operator to maintain the rotation angle of the operating knob, thereby reducing the difficulty of the operation, alleviating the burden on the operator's hands, and indirectly ensuring the accuracy of the operation.

[0019] The detailed structure of the present utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall appearance of the catheter device of Example 1 of the utility model;

[0021] Figure 2 A top view of the catheter device of Example 1 of the utility model;

[0022] Figure 3 It is a partial cross-sectional view of the locking device of Example 1 of the utility model;

[0023] Figure 4 This is a schematic diagram of the lower shell connection structure of Example 1 of the utility model;

[0024] Figure 5 This is a schematic diagram of the upper shell connection structure of Example 1 of the utility model;

[0025] Figure 6 It is a partial cross-sectional view of the catheter device at A of Example 1 of the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the operating knob of Example 1 of the utility model;

[0027] Figure 8 This is a schematic diagram of the lower shell structure of Example 1 of the utility model;

[0028] Fig. 9 This is a schematic diagram of the upper shell structure of Example 1 of the utility model;

[0029] Fig.10 This is a schematic diagram of the locking button structure of Embodiment 1 of the utility model;

[0030] Fig.11 This is a schematic diagram of the overall appearance of the catheter device of Example 2 of the utility model;

[0031] Fig.12 This is a schematic diagram of the lower shell connection structure of Example 2 of the utility model;

[0032] Fig.13 This is a schematic diagram of the upper shell structure of Example 2 of the utility model;

[0033] Fig.14 It is a partial cross-sectional view at point B of the catheter device of Example 2 of the present utility model.

[0034] The names of the components and their corresponding serial numbers are as follows: 1. catheter; 2. operating handle; 3. drug delivery hose; 4. drug delivery device; 5. steering wire; 6. channel; 7. operating knob; 8. locking device; 9. locking button; 10. locking hole; 11. pressing part; 12. rod; 13. locking ring; 14. toothed structure; 15. gear ring; 16. wire fixing seat; 17. guide wire clamp; 18. upper shell; 19. lower shell; 20. placement cavity; 21. first rotating axis; 22. second rotating axis; 23. through groove; 24. operating ear; 25. travel window; 26. connector; 27. fixing block; 28. fixing groove; 29. ​​branch pipe; 30. balloon; 31. air delivery channel; 32. air delivery hose; 33. air delivery device. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. The following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Example 1

[0036] See also Figure 1-10A catheter device for delivering liquid medicine into the body comprises a catheter 1 and an operating handle 2. The operating handle 2 is provided with at least one medicine delivery hose 3. One end of the catheter 1 is connected to the medicine delivery hose 3. The other end of the medicine delivery hose 3 is connected to a drug delivery device 4. The drug delivery device 4 is a prior art and will not be described in detail herein. The other end of the catheter 1 extends out of the operating handle 2. The end of the catheter 1 away from the operating handle 2 is provided with a plurality of steering wires 5. A channel 6 is provided in the catheter 1. The steering wires 5 pass through the channel 6 and extend into the interior of the operating handle 2. An operating knob 7 is provided in the operating handle 2. The end of the steering wire 5 away from the catheter 1 is symmetrically connected to both sides of the operating knob 7. A locking device 8 is also provided inside the operating handle 2. The drug delivery device 4 is commonly used with conventional existing devices such as a Y-type valve or a Y-type hemostatic valve.

[0037] Please refer to Figure 2 and 10 The specific structure of the locking device 8 in this embodiment includes a locking button 9, a locking hole 10 for the operating button to pass through is provided on the operating handle 2, the locking button 9 includes a pressing portion 11 and a rod portion 12, the pressing portion 11 is located outside the operating handle 2, the rod portion 12 passes through the locking hole 10 and is connected to the operating knob 7, a locking ring 13 is provided on the side of the rod portion 12, a toothed structure 14 is provided on the circumferential surface of the operating knob 7, and a gear ring 15 is provided on the inner wall of the operating handle 2. When the locking button 9 is pressed, the locking ring 13 and the locking hole 10 are interference fit, and the toothed structure 14 is meshed with the gear ring 15.

[0038] Please refer to Figure 5 The surgeon stretches the steering wire 5 on one side by rotating the operating knob 7, so that the two sides of the end of the catheter 1 away from the operating handle 2 are unevenly stressed, resulting in deflection and bending; when the catheter 1 is bent to the required angle, the surgeon can press the locking button 9, and the locking button 9 then pushes the toothed structure 14 of the operating knob 7 to engage with the toothed ring 15 on the inner wall of the operating handle 2, and the locking button 9 is self-locking through the interference fit with the operating handle 2 through the locking ring 13, thereby fixing the angle of the catheter 1. The surgeon does not need to hold the operating knob 7 all the time to maintain the angle of the catheter 1, which reduces the difficulty of the operation and ensures the accuracy of the operation.

[0039] In this embodiment, a wire fixing seat 16 is provided at one end of the steering wire 5 close to the operating knob 7 , and a wire guide clamp 17 is symmetrically provided on the operating knob 7 , and the wire fixing seat 16 is fixedly connected to the wire guide clamp 17 .

[0040] Please refer to Figure 4 and Figure 7In this embodiment, the specific structure of the operating handle 2 includes an upper shell 18 and a lower shell 19. The upper shell 18 and the lower shell 19 are covered to form a placement cavity 20. The operating knob 7 is placed in the cavity. The end of the operating knob 7 close to the lower shell 19 is provided with a first rotating shaft 21. The first rotating shaft 21 is hollow inside. The inner side of the lower shell 19 is provided with a second rotating shaft 22. The second rotating shaft 22 is embedded in the first rotating shaft 21. The first rotating shaft 21 and the second rotating shaft 22 are provided with a through groove 23 for the drug delivery hose 3 to pass through along the axis normal. While ensuring the normal rotation of the operating knob 7, the drug delivery hose 3 can also be straightly connected to the catheter 1, which not only optimizes the space planning inside the operating handle 2, but also prevents the adverse effects of the bending of the drug delivery hose 3 on drug delivery and the drug hose itself.

[0041] In this embodiment, an operating ear 24 is provided on the operating knob 7, and travel windows 25 are provided on both sides of the operating handle 2 for the operating ear 24 to extend and move. The operator can directly rotate the operating knob 7 by pushing the operating ear 24, and the travel window 25 not only provides an angle limit for the operating knob 7, but also allows the operator to observe the internal structural state of the operating handle 2 through the travel window 25, which is convenient for self-inspection of the device.

[0042] In this embodiment, a connector 26 is provided between the catheter 1 and the drug delivery hose 3. One end of the connector 26 is connected to the catheter 1, and the other end of the connector 26 is connected to at least one drug delivery hose 3; one or more drugs can be injected into the lesion at the same time.

[0043] In this embodiment, a fixing block 27 is provided on the side of one end of the drug delivery hose 3 of the drug delivery device 4, and a fixing groove 28 is provided in the operating handle 2. The fixing block 27 is embedded in the fixing groove 28, and a branch pipe 29 of the drug delivery device 4 and an end away from the drug delivery hose 3 extend out of the operating handle 2; the drug delivery device 4 is fixed to one end of the operating handle 2 by the fixing block 27 and the fixing groove 28, and the medicine can be directly injected into the catheter 1 through the branch pipe 29 of the drug delivery device 4, which not only maintains the stability of the drug delivery device 4, but also facilitates the injection of the medicine. Example 2

[0044] See also Figure 11-14 On the basis of Example 1, a balloon 30 is provided at the tip of the catheter 1, an air delivery channel 31 connected to the balloon 30 is provided in the catheter 1, and an air delivery hose 32 and an air delivery device 33 are provided in the operating handle 2. One end of the air delivery hose 32 is connected to the air delivery channel 31 through a connector 26, and the other end is connected to the air delivery device 33; the air delivery device 33 is commonly used conventional existing equipment such as a medical Y-type valve or a Y-type hemostatic valve. During use, by inflating the balloon 30 at the tip of the catheter 1, the balloon 31 can be used to squeeze the tissue around the target nerve, reduce the compression / pressure of the surrounding tissue on the nerve, and further facilitate the delivery of the drug solution to the lesion.

[0045] Working process and principle: In the neurolysis operation, the patient needs to take a prone position, local anesthesia is applied to the patient's buttocks, and a puncture needle is used to establish an injection channel at the patient's coccyx. The puncture needle is removed and the guide is retained. The catheter 1 of the catheter device is inserted into the guide into the injection channel so that the tip of the catheter 1 finally reaches the lesion. At this time, the operator needs to control the operating knob 7 of the catheter device to control the bending of the tip of the catheter 1 to get closer to the lesion. During this process, if a catheter device with a balloon is used, a syringe is used to inject air from the air delivery device to inflate the balloon, squeeze the tissue around the target nerve, and reduce the compression / pressure of the surrounding tissue on the nerve. A catheter without a balloon can also be used. After the tip of the catheter 1 is at a reasonable bending angle, the operating knob 7 is pressed down to make the toothed structure 14 in the operating knob 7 mesh with the gear ring 15 in the operating handle 2. The operating knob 7 will not rotate under the drive of the steering wire 5, thereby fixing the bending angle of the tip of the catheter 1; thereafter, the operator can inject the drug solution from the branch tube 29 of the drug delivery device 4 at the tail end of the operating handle 2, and the drug solution will reach the lesion site through the drug delivery hose 3 and the catheter 1, and then the catheter 1 and the guide are withdrawn from the patient's body to complete the operation.

[0046] The above is a specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and concept of the utility model, which should be covered by the protection scope of the claims of the utility model.

Claims

1. A catheter device for delivering a liquid medicine into a body, comprising a catheter (1) and an operating handle (2) connected to each other, characterized in that: At least one medicine delivery hose (3) is arranged in the operating handle (2); one end of the catheter (1) is connected to the medicine delivery hose (3); the other end of the medicine delivery hose (3) is connected to the drug delivery device (4); the other end of the catheter (1) extends out of the operating handle (2); at least two steering wires (5) are arranged in the catheter (1); a channel (6) is arranged in the catheter (1); the steering wire (5) passes through the channel (6) and extends into the interior of the operating handle (2); an operating knob (7) is arranged in the operating handle (2); one end of the steering wire (5) away from the catheter (1) is symmetrically connected to two sides of the operating knob (7); a toothed structure (14) is arranged on the circumferential surface of the operating knob (7); a toothed ring (15) is arranged on the inner wall of the operating handle (2); when the operating knob (7) is pressed down, the toothed structure (14) meshes with the toothed ring (15).

2. A catheter device for delivering liquid medicine into the body according to claim 1, characterized in that: The invention also comprises a locking button (9), wherein the operating handle (2) is provided with a locking hole (10) for the locking button (9) to pass through, the locking button (9) comprises a pressing portion (11) and a rod portion (12), the pressing portion (11) is located outside the operating handle (2), the rod portion (12) passes through the locking hole (10) and is connected to the operating knob (7), a locking ring (13) is provided on the side of the rod portion (12), and when the locking button (9) is pressed, the locking ring (13) is interference-fitted with the locking hole (10).

3. A catheter device for delivering liquid medicine into the body according to claim 1, characterized in that: A metal wire fixing seat (16) is provided at one end of the steering metal wire (5) close to the operating knob (7), a guide wire clamp (17) is symmetrically provided on the operating knob (7), and the metal wire fixing seat (16) is fixedly connected to the guide wire clamp (17).

4. A catheter device for delivering liquid medicine into the body according to claim 1, characterized in that: The operating handle (2) comprises an upper shell (18) and a lower shell (19), wherein the upper shell (18) and the lower shell (19) are covered to form a placement cavity (20), wherein the operating knob (7) is placed in the placement cavity (20), and a first rotating shaft (21) is provided at one end of the operating knob (7) close to the lower shell (19), wherein the first rotating shaft (21) is hollow inside, and a second rotating shaft (22) is provided on the inner side surface of the lower shell (19), wherein the second rotating shaft (22) is embedded in the first rotating shaft (21), and a through groove (23) for the medicine delivery hose (3) to pass through is provided along the axial direction between the first rotating shaft (21) and the second rotating shaft (22).

5. A catheter device for delivering liquid medicine into the body according to any one of claims 1 to 4, characterized in that: An operating ear (24) is provided on the operating knob (7), and travel windows (25) are provided on both sides of the operating handle (2) for the operating ear (24) to extend and move.

6. A catheter device for delivering liquid medicine into the body according to any one of claims 1 to 4, characterized in that: A fixing block (27) is provided on the side of one end of the drug delivery device (4) close to the drug delivery hose (3), a fixing groove (28) is provided in the operating handle (2), the fixing block (27) is embedded in the fixing groove (28), and a branch pipe (29) of the drug delivery device (4) and an end away from the drug delivery hose (3) extend out of the operating handle (2).

7. A catheter device for delivering liquid medicine into the body according to any one of claims 1 to 4, characterized in that: The tip of the catheter (1) is provided with a balloon (30).

8. A catheter device for delivering liquid medicine into the body according to claim 7, characterized in that: An air delivery channel (31) communicating with the balloon (30) is provided in the catheter (1), and an air delivery hose (32) and an air delivery device (33) are correspondingly provided in the operating handle (2).

9. A catheter device for delivering liquid medicine into the body according to claim 7, characterized in that: A connector (26) is provided between the catheter (1) and the medicine delivery hose (3) or / and the gas delivery hose (32); one end of the connector (26) is connected to the catheter (1), and the other end of the connector (26) is connected to at least one medicine delivery hose (3).

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