Pulmonary nodule puncture positioning needle
By designing a fine and smooth pulling wire and a hook-shaped positioning hook structure, the problems of lung tissue damage and inaccurate positioning in the existing lung nodule puncture positioning methods are solved, and safer and more accurate lung nodule positioning is achieved and fixed.
Patent Information
- Application Number
- CN202420002202.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-02
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-01-02
AI Technical Summary
In the existing pulmonary nodule positioning methods, the hardness of the steel wire causes damage and inaccurate positioning of lung tissue, and it is difficult to fix it on the skin, resulting in displacement problems.
A lung nodule puncture positioning needle is designed, using a positioning hook, positioning rod and wire pulling structure. The positioning hook is bent into a hook shape. The wire pulling line is thin and smooth, and can be automatically bounced and positioned near the lung nodules and fixed by medical tape. On the skin, reduce damage and displacement to lung tissue.
It effectively reduces damage to the lungs, improves the accuracy and stability of positioning, reduces the pain of the patient, and improves the reliability of the operation.
Smart Images
Figure CN222265357U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of medical equipment, and in particular relates to a pulmonary nodule puncture positioning needle. Background Art
[0002] With the widespread use of multi-slice CT in clinical practice and the recommendation for physical examinations in people over 45 years old, more and more single and multiple tiny lung nodules have been detected. Currently, CT-guided Hookwire (with a positioning guidewire needle) puncture is mainly used before clinical surgery, and then wedge-shaped resection of lung tissue is performed according to the positioning of the lung surface during thoracoscopic surgery.
[0003] Hookwire preoperative positioning is a safe and effective preoperative positioning method. It was first used for breast positioning. It consists of an outer puncture needle sleeve and a positioning wire. The front end of the positioning wire is a metal hook that can automatically pop open. When Hookwire is used to locate lung nodules, the released metal hook is positioned near the lung nodule, and the rear end of the wire passes through the pleura, muscle, skin and other tissues to extend to the outside of the body. The wire needs to have a certain hardness so that the front metal hook can be pushed out of the needle sleeve and popped open to be positioned near the lung nodule. In order to maintain a certain hardness, the wire cannot be too thin, so it is also easy to be clamped by the muscles, and the metal hook moves along with the breathing movement, hooking the lung tissue. In addition, the hardness of the wire makes it difficult to fix on the skin. With the movement of breathing, it is easy to move, making the positioning inaccurate. Summary of the invention
[0004] In order to solve the above problems, the utility model aims to provide a pulmonary nodule puncture positioning needle, which can reduce damage to the lungs and has reliable positioning.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pulmonary nodule puncture positioning needle, comprising a needle sleeve, a positioning needle core and a push rod, the positioning needle core comprising a positioning hook, a positioning rod and a pull wire, the positioning hook is restrained at the front end inside the needle sleeve, the rear end of the positioning hook is fixedly connected to one end of the positioning rod, one end of the pull wire is connected to the other end of the positioning rod, and the other end of the pull wire passes through the needle sleeve and extends to its outside.
[0006] Furthermore, the free end of the positioning hook is bent toward the positioning hook body and intersects with the positioning hook body to form a hook shape.
[0007] Furthermore, the angle between the free end of the positioning hook and its body is 30-60°.
[0008] Furthermore, the bending part of the positioning hook is in a duckbill shape.
[0009] Furthermore, the positioning rod is thicker than the positioning hook.
[0010] Furthermore, a cover cap is provided at the rear end of the needle sleeve.
[0011] Furthermore, the push rod is placed inside the needle sleeve and located at the rear end of the positioning rod. The push rod is hollow, and the pull wire passes through the push rod and extends to the outside thereof.
[0012] Furthermore, a marking line is provided on the push rod.
[0013] Further, the marking line includes a first marking line, a second marking line and a third marking line. When the initial end of the first marking line is located at the needle sleeve port, the positioning hook is just located inside the needle sleeve. The length of the first marking line is equal to the length of the positioning hook body. The distance between the end of the first marking line and the second marking line is equal to the length from the rear end of the positioning hook body to the proximal end of the positioning rod. The distance between the second marking line and the third marking line is equal to the length of the positioning rod.
[0014] Furthermore, the pull wire is made of polypropylene
[0015] Before the use of the lung nodule puncture positioning needle of the utility model, the positioning hook is bound to the front end of the needle sleeve, and the rear end is connected with the positioning rod and the pull wire in sequence. When in use, the puncture needle sleeve is inserted into the body, and the front end of the needle sleeve is located near the lung nodule. At this time, the positioning rod is pushed by the push rod, and the positioning hook is pushed out of the needle sleeve. After the positioning hook is pushed out of the needle sleeve, it automatically pops open into a hook shape and anchors near the lung nodule for positioning. At this time, the push rod is taken away, the needle sleeve is pulled out, and the tail end of the pull wire is located outside the body. At this time, the pull wire can be pasted on the skin with medical tape. The pull wire is smooth and thin, and the muscle cannot hold the wire, and the positioning hook will not be driven to move along the respiratory movement, so the patient's pain can be alleviated and the lung tissue will not be scratched. In addition, it is fixed on the skin, which can effectively fix and prevent the positioning hook from displacement. It has a simple structure and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of a pulmonary nodule puncture positioning needle in one embodiment of the utility model;
[0017] Figure 2 for Figure 1 sectional view of;
[0018] Figure 3 It is a structural schematic diagram of the positioning needle core;
[0019] Figure 4 Another view of the positioning needle core;
[0020] Figure 5 This is a schematic diagram of the overall structure of a pulmonary nodule puncture positioning needle in another embodiment of the utility model;
[0021] Figure 6 It is a schematic diagram of the marking line on the push tube;
[0022] Figure 7 This is a schematic diagram of pushing the needle core out of the push tube;
[0023] In the above figure: 1-needle sleeve; 11-cover cap; 2-positioning needle core; 21-positioning hook; 22-positioning rod; 23-pull line; 3-push rod; 31-marking line; 311-first marking line; 312-second marking line; 313-third marking line. Implementation
[0024] 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.
[0025] Hookwire preoperative positioning is a safe and effective preoperative positioning method. It was first used for breast positioning. It consists of an outer puncture needle sleeve and a positioning wire. The front end of the positioning wire is a metal hook that can automatically pop open. When Hookwire is used to locate lung nodules, the released metal hook is positioned near the lung nodule, and the rear end of the wire extends through the pleura, muscle, skin and other tissues to the outside of the body. The wire needs to have a certain hardness so that the front metal hook can be pushed out of the needle sleeve and positioned near the lung nodule. In order to maintain a certain hardness, the wire cannot be too thin, so it is easy to be clamped by the muscles, and the metal hook moves along with the breathing movement, hooking the lung tissue. In addition, the hardness of the wire makes it difficult to fix on the skin. With the movement of breathing, it is easy to move, making the positioning inaccurate.
[0026] In order to solve the above problems, the utility model provides a pulmonary nodule puncture positioning needle, such as Figure 1 and Figure 2 As shown, it includes a needle sleeve 1, a positioning needle core 2 and a push rod 3, wherein, as Figure 3 As shown, the positioning needle core 2 includes a positioning hook 21, a positioning rod 22 and a pull wire 23, wherein the positioning hook 21 is bound to the front end inside the needle sleeve 1, the rear end of the positioning hook 23 is fixedly connected to one end of the positioning rod 22, one end of the pull wire 23 is connected to the other end of the positioning rod 22, and the other end of the pull wire 23 passes through the needle sleeve 1 and extends to the outside thereof.
[0027] In the above embodiment, the metal wire positioning needle core in the prior art is replaced with a positioning needle core composed of a positioning hook 21, a positioning rod 22, and a pull wire 23. Before use, the positioning hook 21 is bound to the front end of the needle sleeve 1, and the rear end is connected with the positioning rod 22 and the pull wire 23 in sequence. When in use, the puncture needle sleeve is inserted into the body, and the front end of the needle sleeve 1 is located near the lung nodule. At this time, the positioning rod 22 is pushed by the push rod 3, and then the positioning hook 21 is pushed out of the needle sleeve 1. After the positioning hook 21 is pushed out of the needle sleeve 1, it automatically pops open into a hook shape and anchors near the lung nodule for positioning. At this time, the push rod 3 is taken away, the needle sleeve 1 is pulled out, and the tail end of the pull wire 23 is located outside the body. At this time, the pull wire 23 can be pasted on the skin with medical tape. The pull wire 23 is made of polypropylene, and polypropylene non-absorbable sutures can be selected. They are smooth and thin, and the muscles cannot hold the thread, and the positioning hook 21 will not move along the respiratory movement, so the patient's pain can be alleviated and the lung tissue will not be scratched. In addition, it is fixed on the skin, which can effectively fix and prevent the positioning hook 21 from being displaced, and has a simple structure and high reliability.
[0028] Furthermore, if Figure 4 As shown, the free end of the positioning hook 21 is bent toward the body of the positioning hook 21, and crosses with the body of the positioning hook 21 to form a hook shape. The positioning hook in the prior art is generally a hook-shaped portion between the free end of the positioning hook 21 and its body, but the free end and the body do not cross. When the preoperative positioning is inaccurate, the hook body can be straightened and pulled out of the body by force, but the uncrossed hook body in the prior art, when pulled out forcefully, the connection between the free end of the positioning hook and the body is bent in the opposite direction, and is easily broken due to metal fatigue. However, the positioning hook 21 in the utility model, since the free end of the positioning hook 21 crosses with the body to form a hook, when pulled out forcefully, a knot will be tied between the free end and the body, and will not break due to metal fatigue. Furthermore, the angle between the free end of the positioning hook 21 and its body is 30-45°.
[0029] like Figure 4 As shown, the bend of the positioning hook 21 is duckbill-shaped, and this arrangement enables the lung nodule puncture positioning needle to be flexibly applied to more scenarios. Normally, the needle sleeve 1 can puncture near the lung nodule and directly release the positioning hook 21 for positioning. However, sometimes, there are blood vessels near the lung nodule, and the puncture cannot be completed in one go. At this time, the push rod 3 can be used to push out the front end of the positioning hook 21, that is, to push out the duckbill-shaped bend of the positioning hook 21, and the positioning hook 21 has not been released. At this time, continue to puncture, and the rounded bend of the positioning hook 21 is in front, which can avoid puncturing the blood vessels. After the puncture is in place, release the positioning hook.
[0030] Further, the positioning rod 22 is thicker than the positioning hook 21. This arrangement can reduce the diameter of the positioning hook 21 as much as possible, and at the same time, a thicker positioning rod 22 is arranged to facilitate the push rod 23 to push the positioning hook 21 out of the needle sleeve 1.
[0031] Furthermore, a cover cap 11 is provided at the rear end of the needle sleeve 1. In the following two scenarios, the structure of the cover cap is also different.
[0032] like Figure 5 As shown, the cap 11 is a long tubular rear cover connected to the rear end of the needle sleeve 1. In this structure, the push rod 3 is placed inside the needle sleeve 1, located at the rear end of the positioning rod 22. The push rod 3 is hollow, and the pull wire 23 passes through the push rod 3 and extends to the outside thereof. Figure 4 The middle cover cap 11 is designed to accommodate the push rod 3 inside the needle sleeve 1 to prevent it from sliding out.
[0033] like Figure 1 As shown, the cap 11 is selected as a common heparin cap. In this structure, the push rod 3 is initially placed outside the needle sleeve 1. At this time, the needle sleeve 1 is covered with a heparin cap. During puncture, a sealed state is formed in the needle sleeve 1. This structure is convenient for injecting anesthetics during puncture. As long as the syringe punctures the heparin cap, the anesthetic can be injected into the patient's body through the needle sleeve 1, which is very convenient. When the puncture is in place, the heparin cap is removed, the push rod 3 is inserted into the needle sleeve 1, and the positioning hook 21 is pushed out to achieve positioning.
[0034] like Figure 6 As shown, a marking line 31 is provided on the push rod 3. In order to explain the length of the marking line, the length of the hook body of the positioning hook 21 is the overlapping portion between the free end of the positioning hook 21 and its body. Further, the marking line 31 includes a first marking line 311, a second marking line 312 and a third marking line 313, wherein when the initial end of the first marking line 311 is located at the port of the needle sleeve 1, the positioning hook 21 is just located in the needle sleeve 1, the length of the first marking line 311 is equal to the length of the hook body of the positioning hook 21, the distance between the end of the first marking line 311 and the second marking line 312 is equal to the length from the rear end of the hook body of the positioning hook 21 to the proximal end of the positioning rod 22, and the distance between the second marking line 312 and the third marking line 313 is equal to the length of the positioning rod 22.
[0035] By setting the marking line, it is convenient to locate the distance of the needle sleeve 1 when the positioning needle core is pushed out. The length of the first marking line 311 is set to be equal to the length of the hook body of the positioning hook 21, and when the initial end of the first marking line 311 is located at the end of the needle sleeve 1, the positioning hook 21 is just located in the needle sleeve 1, so the length of the hook body of the positioning hook 21 pushed out of the needle sleeve 1 can be known in the process of releasing the positioning hook 21. When the end of the first marking line 311 is located at the end of the needle sleeve 1, it can be known that the hook body of the positioning hook 21 is just released. The distance between the end of the first marking line 311 and the second marking line 312 is equal to the length from the rear end of the hook body of the positioning hook 21 to the proximal end of the positioning rod 22. When the second marking line 312 is located at the end of the needle sleeve 1, it can be known that the positioning hook 21 has been completely pushed out of the needle sleeve 1 and the positioning rod 22 has begun to be pushed out. The distance between the second marking line 312 and the third marking line 313 is equal to the length of the positioning rod 22. When the third marking line 313 is located at the end of the needle sleeve 1, it can be known that the positioning needle core 2 has been completely pushed out of the needle sleeve 1.
[0036] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.
Claims
1. A pulmonary nodule puncture positioning needle, characterized in that: It includes a needle sleeve, a positioning needle core and a push rod. The positioning needle core includes a positioning hook, a positioning rod and a pull wire. The positioning hook is bound to the front end of the needle sleeve, the rear end of the positioning hook is fixedly connected to one end of the positioning rod, one end of the pull wire is connected to the other end of the positioning rod, and the other end of the pull wire passes through the needle sleeve and extends to the outside thereof.
2. The pulmonary nodule puncture positioning needle according to claim 1, characterized in that: The free end of the positioning hook is bent toward the positioning hook body and intersects with the positioning hook body to form a hook shape.
3. The pulmonary nodule puncture positioning needle according to claim 2, characterized in that: The angle between the free end of the positioning hook and its body is 30-60°.
4. The pulmonary nodule puncture positioning needle according to claim 3, characterized in that: The bending part of the positioning hook is in a duckbill shape.
5. The pulmonary nodule puncture positioning needle according to claim 4, characterized in that: The positioning rod is thicker than the positioning hook.
6. The pulmonary nodule puncture positioning needle according to claim 5, characterized in that: A cover cap is arranged at the rear end of the needle sleeve.
7. The pulmonary nodule puncture positioning needle according to claim 6, characterized in that: The push rod is placed inside the needle sleeve and located at the rear end of the positioning rod. The push rod is hollow. The pull wire passes through the push rod and extends to the outside thereof.
8. The pulmonary nodule puncture positioning needle according to claim 7, characterized in that: A marking line is arranged on the push rod.
9. The pulmonary nodule puncture positioning needle according to claim 8, characterized in that: The marking lines include a first marking line, a second marking line and a third marking line. When the initial end of the first marking line is located at the needle sleeve port, the positioning hook is just located in the needle sleeve. The length of the first marking line is equal to the length of the positioning hook body. The distance between the end of the first marking line and the second marking line is equal to the length from the rear end of the positioning hook body to the proximal end of the positioning rod. The distance between the second marking line and the third marking line is equal to the length of the positioning rod.
10. The pulmonary nodule puncture positioning needle according to claim 9, characterized in that: The pull wire is made of polypropylene.