Medical puncture tube
By combining an inner tube, a middle tube, and an outer tube, and using TPU heat shrink tubing to wrap a metal spring tube to form a rounded transition structure, the problem of the puncture tube scratching the inner wall of the human body cavity is solved, thus improving the safety and production quality of the puncture tube.
Patent Information
- Application Number
- CN202422996432.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The puncture tube can easily scratch the inner wall when moving inside the body cavity, and the use of metal spring tubes in the prior art increases this risk.
It adopts an inner tube, middle tube and outer tube structure, in which the inner tube is a polymer material tube, the middle tube is a metal spring tube and the outer tube is a TPU heat shrink tube. Through heat shrink treatment, the outer tube completely wraps the middle tube to form an arc transition structure to avoid direct contact with the inner wall of the cavity.
This effectively avoids scratching the inner wall of the puncture tube when it moves within the cavity, thus improving the safety and production quality of the puncture tube.
Smart Images
Figure CN223759861U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of surgical instruments, and in particular to a medical puncture tube. Background Technology
[0002] Minimally invasive interventional therapy and endoscopic techniques involve connecting an endoscope's camera to a puncture tube, which is then inserted into the body through natural cavities such as the mouth, nose, or anus. The camera is precisely positioned near the lesion for examination and the data is transmitted to medical imaging equipment. Minimally invasive interventional therapy can precisely deliver therapeutic instruments and medications to the lesion site through the puncture tube for treatment.
[0003] When a puncture tube is inserted into the human body, a metal spring tube is placed over it for reinforcement in order to maintain a better pushing effect. However, the metal puncture tube also increases the possibility of scratching the inner wall of the cavity when it moves inside the body. Utility Model Content
[0004] To prevent the puncture tube from scratching the inner wall of the human body cavity when it enters the body, this utility model provides a medical puncture tube.
[0005] This utility model provides a medical puncture tube, which adopts the following technical solution:
[0006] A medical puncture tube includes an inner tube, a middle tube, and an outer tube, wherein the middle tube is a metal spring tube and the outer tube is a TPU tube.
[0007] In one specific implementation, the inner tube is a polymer material tube.
[0008] In one specific implementation, the outer tube is a heat shrink tubing with a shrinkage rate of 1.3-1.5.
[0009] In one specific implementation, the length of the intermediate tube is less than that of the inner tube and the outer tube.
[0010] In one specific implementation, the outer tube has a circular arc transition structure.
[0011] In one specific implementation, the inner diameter of the intermediate tube is 0.01-0.1 mm smaller than the outer diameter of the inner tube.
[0012] In one specific implementation, the wall thickness of the inner tube is 0.1-0.2 mm greater than the wall thickness of the outer tube.
[0013] In summary, this utility model has at least one of the following beneficial technical effects:
[0014] 1. The outer tube covers the middle tube, isolating the middle tube from the inner wall of the human body cavity, thereby minimizing the risk of the puncture tube scratching the inner wall when moving within the cavity.
[0015] 2. The outer tube is a TPU heat shrink tubing, which shrinks and bends when heated, allowing the outer tube to fuse with the inner tube at high temperatures, completely encasing the middle tube. The end of the puncture tube is also rounded, further preventing the puncture tube from scratching the inner wall when moving within the cavity. Attached Figure Description
[0016] Figure 1 This is a cross-sectional view of the puncture tube.
[0017] Explanation of reference numerals in the attached diagram: 1. Outer tube; 2. Middle tube; 3. Inner tube. Detailed Implementation
[0018] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.
[0019] Reference Figure 1 The medical puncture tube includes an inner tube 3, a middle tube 2, and an outer tube 1, which are sequentially installed from the inside out. The inner tube 3 is a polymer material tube, specifically a TPU (thermoplastic polyurethane elastomer) tube. The middle tube 2 is a metal spring tube, and the outer tube 1 is a TPU heat shrink tube.
[0020] The length of the intermediate tube 2 is slightly less than that of the inner tube 3 and the outer tube 1. The inner diameter of the intermediate tube 2 is smaller than the outer diameter of the inner tube 3 by 0.01-0.1 mm, ensuring a tighter fit between the inner tube 3 and the intermediate tube 2 after the intermediate tube 2 is fitted onto it. The outer tube 1 is then fitted onto the intermediate tube 2, with a shrinkage rate of 1.3-1.5. The outer tube 1 is then uniformly heated to cause it to shrink evenly. The inner tube 3 and the outer tube 1 are then fused together using a welding device, completely encasing the intermediate tube. Simultaneously, the fusion of the inner tube 3 and the outer tube 1 forms a smooth, rounded transition structure without sharp edges, preventing scratches to the body's cavities when it moves within them.
[0021] The inner tube 3 has a wall thickness that is 0.1-0.2 mm greater than that of the outer tube 1. When the outer tube 1 is heated and shrinks, the inner tube 3 will not change significantly, which helps to maintain the stability of the inner tube 3 and the intermediate tube 2 during the processing and improves the production quality of the puncture tube.
[0022] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A medical puncture tube, characterized by: It comprises an inner tube (3), a middle tube (2) and an outer tube (1), the middle tube (2) is a metal spring tube, and the outer tube (1) is a TPU tube.
2. The medical puncture tube according to claim 1, characterized by: The inner tube (3) is a polymer material tube.
3. The medical puncture tube according to claim 1, characterized by: The outer tube (1) is a heat shrink tube, and the shrinkage rate of the outer tube (1) is 1.3-1.
5.
4. The medical puncture tube according to claim 1, characterized by: The length of the middle tube (2) is less than that of the inner tube (3) and the outer tube (1).
5. The medical puncture tube according to claim 1, wherein: The outer tube (1) has a circular arc transition structure.
6. The medical puncture tube according to claim 1, wherein: The inner diameter of the middle tube (2) is 0.01-0.1 mm smaller than the outer diameter of the inner tube (3).
7. The medical puncture tube according to claim 1, wherein: The wall thickness of the inner tube (3) is 0.1-0.2 mm larger than that of the outer tube (1).