A catheter for chemotherapy drugs for spinal tuberculosis

Abstract

This invention provides a chemotherapy catheter for spinal tuberculosis, comprising a catheter with a drug channel, a flexible tube at the front end of the catheter with multiple through holes communicating with the drug channel, and a built-in one-way structure. The one-way structure includes an elastic rubber sheet at one end fixed to the inner wall of the drug channel; multiple elastic rubber sheets are stacked together in a conical shape; and a connector is connected to the rear end of the catheter, with a drug injection end for injecting medication. This invention, by inserting the catheter into the patient's body, injects medication through the drug injection end, which then passes through the drug channel and the one-way structure to prevent backflow, and finally flows out through the multiple through holes, thereby widely dispersing the medication and improving drug utilization.

Description

Technical Field

[0001] This utility model relates to the medical field, specifically to a chemotherapy catheter for spinal tuberculosis. Background Technology

[0002] Spinal tuberculosis ranks first among all bone and joint tuberculosis, with vertebral body tuberculosis being the most common, while appendage tuberculosis is very rare. Among the entire spine, the lumbar spine has the greatest range of motion and the highest incidence of lumbar tuberculosis, followed by the thoracic spine, and then the cervical spine. As for sacral and coccygeal tuberculosis, it is extremely rare.

[0003] Spinal tuberculosis is a vertebral lesion caused by Mycobacterium tuberculosis. It often occurs secondary to pulmonary tuberculosis and is common in the thoracic, lumbar, and cervical vertebrae. Spinal tuberculosis can lead to bone destruction, necrosis, caseous changes, and even abscess formation, which can cause deformities or paraplegia. Treatment of spinal tuberculosis usually involves a combination of anti-tuberculosis drug therapy and surgical treatment.

[0004] Patent CN202210569775.5 discloses a catheter structure for continuous in vitro targeted chemotherapy after spinal tuberculosis surgery. The catheter includes a through-hole in the middle, one end for connecting to a drug injection device, and the other end has a port. A valve is located inside one end of the catheter, allowing one-way passage of the catheter. Multiple lateral outlets are located on the sidewall of the other end of the catheter. Utilizing a graduated catheter structure, it can be accurately inserted from outside the body after spinal tuberculosis surgery to precisely deliver drugs to the lesion site. This addresses the issue of early local drug administration after spinal tuberculosis surgery and increases the drug concentration directly acting on the lesion site, reducing the problems of long treatment time, insignificant efficacy, and significant side effects associated with conventional anti-tuberculosis drugs after surgery. The graduated lines on the catheter wall improve the accuracy of catheter positioning. Guided by a guide tube, it can be inserted from outside the body, ensuring accurate injection of anti-tuberculosis drugs to the spinal tuberculosis lesion site and avoiding the need for re-operation.

[0005] However, it has too many functions, and the effect is actually not good when the drug is dispersed. Utility Model Content

[0006] The problem this invention aims to solve is to provide a spinal tuberculosis chemotherapy catheter that helps with drug dispersion, addressing the aforementioned shortcomings in the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a chemotherapy catheter for spinal tuberculosis, comprising a catheter having a drug channel, a flexible tube at the front end of the catheter, a plurality of through holes communicating with the drug channel on the flexible tube, a built-in one-way structure in the catheter, the one-way structure including an elastic rubber sheet at one end fixedly connected to the inner wall of the drug channel, a plurality of elastic rubber sheets being sequentially stacked together to form a cone shape, and a connector at the rear end of the catheter, the connector having a drug injection end for injecting drugs.

[0008] Furthermore, the inner wall of the conduit has a built-in wire, the connector has a spiral blind hole, the spiral protrusion connected to the rotating component is screwed into the spiral blind hole, one end of the wire passes through the connector and is connected to the rotating component, and the other end of the wire is fixedly connected to the end of the hose.

[0009] Furthermore, when the spiral protrusion moves outward toward the spiral blind hole, it can bend the hose into a spiral shape by pulling the wire.

[0010] Furthermore, the conduit and the hose have a wire-pulling channel for the wire to be pulled, and the wire-pulling channel passes through the connector.

[0011] Furthermore, the drug injection end is connected to the inner cavity of the connector, the inner cavity is connected to the drug channel, and the inner cavity is arc-shaped, connecting the drug injection end and the drug channel respectively.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention inserts a catheter into the patient's body, injects the drug through the drug injection end, and then the drug passes through the drug channel and the one-way structure to prevent backflow, and finally flows out from multiple through holes, thereby dispersing the drug over a wide range and helping to improve drug utilization.

[0013] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a chemotherapy catheter for spinal tuberculosis.

[0015] Figure 2 This is a schematic diagram of a unidirectional structure. Detailed Implementation

[0016] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0017] This invention discloses a chemotherapy catheter for spinal tuberculosis, comprising a catheter 1 having a drug channel, a flexible tube 2 at the front end of the catheter 1, and multiple through holes 3 communicating with the drug channel on the flexible tube 2. The catheter 1 has a built-in one-way structure 4, which includes an elastic rubber sheet 5 fixedly connected at one end to the inner wall of the drug channel. Multiple elastic rubber sheets 5 are sequentially stacked together to form a cone shape. When the drug passes through the multiple elastic rubber sheets 5, it expands the cone shape and flows to the flexible tube 2. A connector 6 is connected to the rear end of the catheter 1, and the connector 6 has a drug injection end 7 for injecting the drug. By delivering the drug through the drug channel to the lesion site, the problem of early local drug administration after spinal tuberculosis surgery can be solved.

[0018] The inner wall of the conduit 1 has a built-in drawstring 8. The connector 6 has a spiral blind hole 9. The spiral protrusion 10 connected to the rotating component 11 is screwed into the spiral blind hole 9. One end of the drawstring 8 passes through the connector 6 and is connected to the rotating component 11. The other end of the drawstring 8 is fixedly connected to the end of the flexible tube 2. The flexible tube bends when the drawstring 8 moves. When the spiral protrusion 10 moves outward toward the spiral blind hole 9, it can pull the flexible tube 2 to bend into a spiral shape through the drawstring 8. The conduit 1 and the flexible tube 2 have a drawstring passage for the drawstring 8 to pull. The drawing channel passes through the connector 6; by rotating the rotating component 11, the spiral protrusion 10 is driven to rotate in and out of the spiral blind hole 9. The hose 2 also has the toughness of rebound, so that when the spiral protrusion 10 rotates in, the hose 2 returns to the initial position. When the spiral protrusion 10 reaches the innermost side of the spiral blind hole 9, the hose 2 is just straightened. The drug injection end 7 is connected to the inner cavity of the connector 6. The inner cavity is connected to the drug channel. The inner cavity is arc-shaped and connects the drug injection end 7 and the drug channel respectively.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drug chemotherapy catheter for spinal tuberculosis, characterized by: The device includes a catheter (1) having a drug channel, a flexible tube (2) at the front end of the catheter (1), a plurality of through holes (3) communicating with the drug channel on the flexible tube (2), a built-in one-way structure (4) in the catheter (1), the one-way structure (4) including an elastic rubber sheet (5) with one end fixedly connected to the inner wall of the drug channel, a plurality of elastic rubber sheets (5) being stacked together in sequence to form a cone shape, and a connector (6) connected to the rear end of the catheter (1), the connector (6) having a drug injection end (7) for injecting drugs.

2. A catheter for chemotherapy of spinal tuberculosis as claimed in claim 1 wherein: The inner wall of the conduit (1) has a built-in wire (8), the connector (6) has a spiral blind hole (9), the spiral protrusion (10) connected to the rotating part (11) is screwed into the spiral blind hole (9), one end of the wire (8) passes through the connector (6) and is connected to the rotating part (11), and the other end of the wire (8) is fixedly connected to the end of the hose (2).

3. The catheter according to claim 2, wherein: When the spiral protrusion (10) moves outward toward the spiral blind hole (9), it can pull the hose (2) to bend into a spiral shape through the wire (8).

4. The catheter according to claim 2, wherein: The conduit (1) and the hose (2) have a wire-pulling channel for the wire puller (8) to pull, and the wire-pulling channel passes through the connector (6).

5. The catheter according to claim 1, wherein: The drug injection end (7) is connected to the inner cavity of the connector (6), the inner cavity is connected to the drug channel, and the inner cavity is arc-shaped, connecting the drug injection end (7) and the drug channel respectively.

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