C-shaped pulmonary nodule puncture positioning needle

Abstract

The utility model belongs to the field of medical equipment, and particularly relates to a C-shaped pulmonary nodule puncture positioning needle, which comprises a needle sleeve and a positioning needle core, the positioning needle core comprises a positioner and a push tube which are sequentially arranged from front to back, the positioner comprises at least two positioning claws and a pull wire, the middle parts of the bundled positioning claws are fixed by a positioning ring, and the push tube is connected with the positioning ring. One end of the pull wire is fixed in the middle of the positioning claw, the other end of the pull wire penetrates through the push tube and extends to the outer side of the push tube, when the positioner is arranged in the needle sleeve, the positioning claw is bound in the needle sleeve, and when the positioner is pushed out of the needle sleeve, the positioning claw expands outwards to be in a C shape. The utility model aims to provide the C-shaped pulmonary nodule puncture positioning needle, which can greatly ensure the positioning stability and prevent displacement, is further used for positioning pulmonary nodules and is convenient for resection operation.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically relating to a C-type pulmonary nodule puncture positioning needle. Background Technology

[0002] With the widespread clinical use of multi-slice CT and its recommendation for physical examinations in people over 45 years of age, more and more single and multiple small nodules in the lungs are being detected.

[0003] Currently, preoperative clinical methods for locating small nodules mainly include CT-guided hook-wire puncture and CT-guided coil puncture. Hook-wire puncture involves inserting a metal needle with a hook at the tip directly into the vicinity of the lesion. The hook at the tip anchors the needle, and the metal needle extends to the skin surface. During thoracoscopic surgery, the lung tissue is wedge-shaped and removed based on the needle's position. Coil puncture, on the other hand, involves first inserting a puncture needle into the vicinity of the lesion, and then releasing a flexible metal coil through the hollow sheath of the puncture needle. The tail of the coil must extend to the lung surface. During thoracoscopic surgery, the lung tissue is wedge-shaped and removed based on the coil's positioning on the lung surface.

[0004] Chinese utility model patent CN204016436U discloses a pulmonary nodule puncture positioning needle. The needle core has three evenly distributed J-shaped hooks at its head, which are used to anchor around the pulmonary nodule for positioning after implantation. Although the three J-shaped hooks can anchor evenly in three directions in the same plane, the bending direction of the three J-shaped hooks is consistent in the direction perpendicular to the plane, and they are all roughly opposite to the puncture direction. Therefore, in actual application, with breathing movements, the J-shaped hooks are still prone to move along the puncture direction, which may lead to displacement and inaccurate positioning. Utility Model Content

[0005] To address the aforementioned problems, this invention aims to provide a C-type pulmonary nodule puncture and positioning needle, which can greatly ensure the stability of positioning and prevent displacement, thereby facilitating the positioning of pulmonary nodules and enabling resection surgery.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a C-type pulmonary nodule puncture positioning needle, comprising a needle sheath and a positioning needle core, wherein the positioning needle core comprises a locator and a push rod arranged sequentially from front to back, the locator comprising at least two positioning claws and a pull wire, wherein the positioning claws are bundled together and fixed in the middle by a positioning ring, one end of the pull wire is fixed in the middle of the positioning claws, and the other end passes through the push rod and extends to its outer side, wherein when the locator is placed in the needle sheath, the positioning claws are bound inside the needle sheath, and when the locator is pushed out of the needle sheath, the positioning claws expand outward into a C-shape.

[0007] Furthermore, several of the positioning claws are evenly distributed circumferentially around the axis of the positioning pin core.

[0008] Furthermore, the positioning claw is a pre-shaped shape memory alloy strip.

[0009] Furthermore, the positioner includes three positioning claws.

[0010] Furthermore, the rear end of the needle sheath is provided with a needle sheath handle, the rear end of the needle sheath handle is connected to a push cylinder, the rear end of the push rod is connected to a push tube, and the push tube can slide back and forth along the push cylinder.

[0011] Furthermore, a sealing gasket is provided between the needle sleeve handle and the push cylinder.

[0012] Furthermore, the push tube is provided with a slide rail, and a slider is provided inside the slide rail, the slider being fixedly connected to the push tube.

[0013] Furthermore, the slide rail includes a transverse groove, a type I groove located on one side of the transverse groove, and a type Z groove located on the other side of the transverse groove.

[0014] Furthermore, a cap is provided at the rear end of the push tube.

[0015] Furthermore, the cap is connected to the push tube via a Luer connector, and a sealing silicone sheet is provided at the rear end of the cap.

[0016] When the positioning claw of the C-shaped pulmonary nodule puncture positioning needle of this invention is pushed out of the needle sheath, it expands outward into a C-shape. After the C-shaped positioning claw is fixed near the pulmonary nodule, it is evenly anchored in two planes perpendicular to the puncture path in different directions. The rear end of the positioning claw bends towards the puncture direction, while the front end bends away from the puncture direction. At this time, the C-shaped positioning claw is also anchored in two directions of the puncture path, which can greatly ensure the stability of the positioning and prevent displacement. This makes it suitable for locating pulmonary nodules and facilitating the resection surgery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the C-type pulmonary nodule puncture and positioning needle of this utility model;

[0018] Figure 2 for Figure 1 Cross-sectional view;

[0019] Figure 3 for Figure 1 The perspective of the front end;

[0020] Figure 4 This is a schematic diagram showing the positioning claw being restrained within the needle sleeve.

[0021] Figure 5 A schematic diagram showing the positioning claw expanding into a C-shape as it pushes out of the needle sleeve;

[0022] Figure 6 This is a schematic diagram of the positioner after it is released through a slot.

[0023] Figure 7 This is a schematic diagram of the positioner after it is released through the Z-slot.

[0024] In the above figure: 1-needle sheath; 11-needle sheath handle; 12-push cylinder; 13-sealing gasket; 14-slide rail; 141-horizontal groove; 142-type groove; 143-Z-type groove; 2-positioning needle core; 21-push rod; 22-positioning claw; 23-pull wire; 24-positioning ring; 25-push tube; 26-slider; 27-cap. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0026] Chinese utility model patent CN204016436U discloses a pulmonary nodule puncture positioning needle. The needle core has three evenly distributed J-shaped hooks at its head, which are used to anchor around the pulmonary nodule for positioning after implantation. Although the three J-shaped hooks can anchor evenly in three directions in the same plane, the bending direction of the three J-shaped hooks is consistent in the direction perpendicular to the plane, all facing away from the puncture direction. Therefore, in actual application, with respiratory movements, the J-shaped hooks are still prone to move along the puncture direction, which may lead to displacement and inaccurate positioning.

[0027] To address the aforementioned problems, this invention provides a C-type pulmonary nodule puncture and positioning needle, such as... Figure 1 and Figure 2 As shown, it includes a needle sleeve 1 and a positioning needle core 2. The positioning needle core 2 includes a positioner and a push rod 21 arranged sequentially from front to back. The positioner includes at least two positioning claws 22 and a pull wire 23. After the positioning claws 22 are bundled together, the middle part is fixed by a positioning ring 24. One end of the pull wire 23 is fixed to the middle of the positioning claw 22, and the other end passes through the push rod 21 and extends to the outside of the push rod 21. When the positioner is placed in the needle sleeve 1, the positioning claws 22 are bound inside the needle sleeve 1. When the positioner is pushed out of the needle sleeve 1, the positioning claws 22 expand outward into a C-shape.

[0028] Furthermore, several positioning claws 22 are evenly distributed circumferentially around the axis of the positioning pin core 2. This ensures that the anchoring positions are evenly distributed within a plane, improving the stability of the positioning.

[0029] Furthermore, the positioning claw 22 is a pre-shaped shape memory alloy strip. The shape memory alloy strip needs to be pre-shaped into a C-shape. At least two positioning claws 22 are provided. Due to the limited space inside the needle sleeve 1, the thickness, strength, and number of each positioning claw 22 need to be taken into account to ensure its anchoring strength. The optimal number of positioning claws 22 is three.

[0030] like Figure 3 As shown, the needle tip of the needle sheath 1 is a beveled tip, providing strong puncture capability. The positioning needle core 2 is located inside the needle sheath 1. Bundles of positioning claws 22 are bound within the front end of the needle sheath 1. A push rod 21 is located at the rear end of the positioning claws 22. One end of a pull wire 23 is fixed to the middle of the positioning claws 22, and the other end extends through the push rod 21 to the outside of the push rod 21. In use, after locating the pulmonary nodule via CT scan, the puncture positioning needle is inserted near the pulmonary nodule. Then, the positioning claws 22 are pushed out of the needle sheath 1 by the push rod 21. At this point, the positioning claws 22 are no longer bound and expand outward into a C-shape. Figure 4 The image shows the positioning claw 22 being secured within the needle sleeve 1, as shown. Figure 5 The diagram shows the positioning claw 22 extended outward into a C-shape after being pushed out of the needle sheath 2. After the C-shaped positioning claw 22 is fixed near the pulmonary nodule, it is evenly anchored in two planes perpendicular to the puncture path in different directions. The rear end of the positioning claw 22 bends towards the puncture direction, while the front end bends away from it. At this point, the C-shaped positioning claw 22 is also anchored in both directions of the puncture path, greatly ensuring the stability of the positioning and preventing displacement. This facilitates the localization of the pulmonary nodule and makes resection easier. After positioning, the needle sheath 1 and push rod 21 are removed. The positioning claw 22 is then connected to the outside of the body via a pull wire 23, which is secured to the patient's skin with medical tape.

[0031] Furthermore, such as Figure 1 and Figure 2 As shown, the needle sleeve 1 has a needle sleeve handle 11 at its rear end, and a push cylinder 12 is connected to the rear end of the needle sleeve handle 11. A push tube 25 is connected to the rear end of the push rod 21, and the push tube 25 can slide back and forth along the push cylinder 12. By sliding the push tube 25 along the push cylinder 12, the positioning claw 22 can be pushed out of the needle sleeve 1, which is convenient to operate.

[0032] To ensure the sealing of the needle sheath 1, a sealing gasket 13 is provided between the needle sheath handle 11 and the push cylinder 12.

[0033] Furthermore, such as Figure 6 and 7As shown, a slide rail 14 is provided on the push cylinder 12, and a slider 26 is provided inside the slide rail. The slider 26 is fixedly connected to the push tube 25. Figure 6 and 7 As shown, the slide 14 includes a transverse groove 141 and a type groove 142 located on one side of the transverse groove, such as... Figure 6 As shown; and the Z-shaped groove 143 located on the other side of the transverse groove, as... Figure 7 As shown. Two methods are provided for implanting the locator by setting a slide 14 on the push cylinder 12 and a slider 26 on the push tube 25. Initially, the slider 26 is located within the transverse groove 141, and at this time, the positioning claws 22 are all located within the needle sleeve 1. When the slider 26 is pushed to the bottom along the I-groove 142, the positioning claws 22 are all pushed out of the needle sleeve 1, expanding into a C-shape, as shown. Figure 6 As shown, this method is used when the doctor is very certain about the anchoring position of the locator, allowing for quick and accurate release. However, when the doctor is less certain about the anchoring position, or when a CT scan is needed to confirm the position during locator release, the slider 26 is pushed into the Z-groove 143. When the slider 26 slides halfway down the Z-groove, half of the positioning claw 22 is released into the body, as shown. Figure 7 As shown, since the positioning claws 22 are fixed in the middle after being bundled, if a CT scan reveals that the anchoring position is not suitable, the positioning claws 22 can be pulled back into the needle sleeve 1 and repositioned using the pull wire 23. This is essentially a "reversal mechanism," making the implantation of the locator more flexible, highly operable, and improving the accuracy of positioning. The design of the slide and slider provides doctors with more options for implanting the locator.

[0034] To ensure the sealing of the positioning needle core 2, a cap 27 is provided at the rear end of the push tube 25. Specifically, the cap 27 is connected to the push tube 25 via a Luer connector, and a sealing silicone sheet is provided at the rear end of the cap 27. Because the patient experiences significant pain during puncture, especially when penetrating the pleural or peritoneal lining, the sealing silicone sheet at the rear end of the cap 27 can be punctured using a register, allowing the anesthetic to be registered to the puncture site via the push tube 25 and push rod 21.

[0035] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A C-type pulmonary nodule puncture and positioning needle, characterized in that, The device includes a needle sheath and a positioning needle core. The positioning needle core includes a locator and a push rod arranged sequentially from front to back. The locator includes at least two positioning claws and a pull wire. The positioning claws are bundled together and fixed in the middle by a positioning ring. One end of the pull wire is fixed in the middle of the positioning claw, and the other end passes through the push rod and extends to its outer side. When the locator is placed in the needle sheath, the positioning claws are bound inside the needle sheath. When the locator is pushed out of the needle sheath, the positioning claws expand outward into a C-shape.

2. The C-type pulmonary nodule puncture and positioning needle according to claim 1, characterized in that, Several of the positioning claws are evenly distributed circumferentially around the axis of the positioning pin core.

3. The C-type pulmonary nodule puncture and positioning needle according to claim 2, characterized in that, The positioning claw is a pre-shaped shape memory alloy strip.

4. The C-type pulmonary nodule puncture and positioning needle according to claim 3, characterized in that, The positioner includes three positioning claws.

5. The C-type pulmonary nodule puncture and positioning needle according to claim 4, characterized in that, The needle sheath has a needle sheath handle at its rear end, a push cylinder is connected to the rear end of the needle sheath handle, and a push tube is connected to the rear end of the push rod. The push tube can slide back and forth along the push cylinder.

6. The C-type pulmonary nodule puncture and positioning needle according to claim 5, characterized in that, A sealing gasket is provided between the needle sleeve handle and the push cylinder.

7. The C-type pulmonary nodule puncture and positioning needle according to claim 6, characterized in that, The push tube is provided with a slide rail, and a slider is provided inside the slide rail. The slider is fixedly connected to the push tube.

8. The C-type pulmonary nodule puncture and positioning needle according to claim 7, characterized in that, The slide includes a transverse groove, a type I groove located on one side of the transverse groove, and a type Z groove located on the other side of the transverse groove.

9. The C-type pulmonary nodule puncture and positioning needle according to claim 8, characterized in that, The rear end of the push tube is equipped with a cap.

10. The C-type pulmonary nodule puncture and positioning needle according to claim 9, characterized in that, The cap is connected to the push tube via a Luer connector, and a sealing silicone sheet is provided at the rear end of the cap.

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