Pulmonary nodule positioning device for thoracoscopic surgery

Abstract

The invention discloses a pulmonary nodule positioning device for thoracoscopic surgery, and belongs to the field of medical instruments, the pulmonary nodule positioning device for thoracoscopic surgery comprises a puncture needle cylinder and a puncture needle head, the puncture needle head is internally sleeved with a pushing device in the axial direction of the puncture needle head, and the pushing device is arranged in the puncture needle cylinder. The pushing device is arranged on the puncture needle cylinder and can slide in the axial direction of the puncture needle head and the puncture needle cylinder, one end of the pushing device penetrates out of the end, away from the puncture needle head, of the puncture needle cylinder and is exposed out of the outer side of the puncture needle cylinder, and the push-out structure is arranged on the puncture needle cylinder. The pushing action is stable and controllable through a damping structure formed by the corrugated second movable plate and the fixed plate, an operator can conveniently and accurately adjust the positioning depth, the surgical risk is further reduced, the clinical application effect of the minimally invasive surgery is improved, and the device is particularly suitable for positioning scenes of tiny and deep pulmonary nodules.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a lung nodule localization device for thoracoscopic surgery. Background Technology

[0002] A lung nodule localization needle is an instrument used to guide lung nodule biopsies or surgical resections. It typically consists of a thin, elongated metal needle and associated landmarks, and can be inserted to the precise location of the lung nodule under radiographic guidance.

[0003] During clinical lung nodule biopsy and localization, medical staff must follow specific procedures to unlock and push the positioning needle. First, hold the needle body with one hand and use the fingers to remove the anchor pin. After removing the anchor pin, use the same hand to release the locking mechanism to unlock the needle. Then, use the other hand to precisely press the pushing device of the positioning needle, pushing the anchor and other core components to complete the lung nodule biopsy. The positioning operation of lung nodules requires the alternating use of both hands, with each step having a clear sequence of execution. During the operation, medical staff need to continuously adjust the position of their hands and the manipulation. This not only demands a high degree of continuity and precision in the operation, but also increases the operation time due to the frequent switching of hands. In scenarios where high efficiency is required, such as clinical emergency and minimally invasive surgery, this operation method can reduce the overall efficiency of the positioning operation. At the same time, slight deviations in hand manipulation may affect the accuracy of the positioning needle's push, thus potentially impacting the accuracy of lung nodule positioning.

[0004] Therefore, the present invention provides a lung nodule localization device for thoracoscopic surgery to solve the above-mentioned problems. Summary of the Invention

[0005] The present invention provides a lung nodule localization device for thoracoscopic surgery, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lung nodule localization device for thoracoscopic surgery, comprising a puncture needle barrel and a puncture needle tip, the puncture needle barrel and the puncture needle tip being an integrally formed structure, a pushing device being sleeved inside the puncture needle tip along its axial direction, and the pushing device being slidable along the axial direction of the puncture needle tip and the puncture needle barrel, one end of the pushing device extending through the end of the puncture needle barrel away from the puncture needle tip and exposed outside the puncture needle barrel, further comprising:

[0007] An ejector structure, which is mounted on the puncture needle barrel, is used to push the pusher device to move along the axial direction of the puncture needle barrel;

[0008] The ejection structure includes two sets of symmetrically opened grooves on the outer surface of the puncture needle barrel and a movable component fixed on the outer surface of the pushing device. The end of the movable component extends through the groove and slides along the axial direction of the puncture needle barrel. A first spring is sleeved on the outer surface of the pushing device. The first spring elastically supports the inner wall of the puncture needle barrel and the movable component. A slot is opened on the outside of the puncture needle barrel. A fixed shaft is fixed inside the slot. A first movable plate and a second spring are sleeved on the outer surface of the fixed shaft. The second spring elastically supports the first movable plate and the inner wall of the slot. A limiting shaft is fixed on the top of the first movable plate. A slot is opened on the outside of the movable component. The limiting shaft can engage with the slot.

[0009] As a preferred technical solution of this application, a positioning line is provided inside the puncture needle tip along its axial direction, a cylinder is fixed at one end of the positioning line, and an anchoring positioning needle is fixed at the end of the cylinder away from the positioning line.

[0010] As a preferred technical solution of this application, the pushing device is a hollow structure, the positioning line passes through the hollow cavity of the pushing device, and the cylinder and the puncture needle tip slide together along the axial direction of the puncture needle tip.

[0011] As a preferred technical solution of this application, the end of the pushing device near the tip of the puncture needle can be squeezed and abutted against the end of the cylinder away from the anchoring and positioning needle.

[0012] As a preferred technical solution of this application, the movable part is fixed with a second movable plate by a spring sheet on the side near the inner wall of the puncture needle barrel, and a fixed plate is fixed on the inner wall of the puncture needle barrel at the position corresponding to the second movable plate. The surfaces of the second movable plate and the fixed plate are both corrugated, and the corrugated surfaces of the second movable plate and the fixed plate abut against each other.

[0013] As a preferred technical solution of this application, the first spring is elastically supported between the inner wall of the puncture needle barrel and the side of the second movable plate away from the spring plate.

[0014] As a preferred technical solution of this application, the anchoring and positioning needle is made of shape memory alloy. When the anchoring and positioning needle is housed inside the puncture needle head, it is in a straight state, and when it is separated from the puncture needle head, it is in a naturally curved state.

[0015] Beneficial effects

[0016] I. This positioning device significantly improves the accuracy and safety of lung nodule localization in thoracoscopic surgery. The anchoring positioning needle is made of shape memory alloy, with a design that straightens during reception and naturally bends after release. It can be smoothly inserted into the body through a minimally invasive incision and forms a stable anchor around the lung nodule, effectively preventing the positioning needle from shifting or falling off. Combined with the clear marking of the positioning line, it greatly reduces the difficulty of locating the nodule during surgery, shortens the operation time, and reduces lung tissue damage. At the same time, the locking mechanism composed of the limiting shaft and the slot can prevent accidental triggering before and during surgery. The damping structure formed by the corrugated second movable plate and the fixed plate makes the pushing action smooth and controllable, which makes it easy for the surgeon to accurately adjust the positioning depth, further reducing surgical risks and improving the clinical application effect of minimally invasive surgery, especially suitable for the localization of small and deep lung nodules.

[0017] Second, the automatic reset function of the pushing device is achieved through the elastic cooperation of the first and second springs, allowing the device to be removed without additional disassembly, simplifying the surgical procedure and improving surgical efficiency. The sliding cooperation between the moving parts and the symmetrical grooves, and the axial guiding cooperation between the cylinder and the puncture needle tip, ensure smooth movement of each component, avoid jamming or displacement, and extend the service life of the device. In addition, the compact integration of each structure does not increase the overall size of the device, adapting to the operating space requirements of thoracoscopic minimally invasive surgery. Furthermore, the selection of core components takes into account both biocompatibility and structural strength, reducing production and usage costs while ensuring clinical safety, and has broad clinical application value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a lung nodule localization device used in thoracoscopic surgery.

[0019] Figure 2 This is a schematic diagram of the disassembly structure of a lung nodule localization device used in thoracoscopic surgery.

[0020] Figure 3 A schematic cross-sectional view of the side of a lung nodule localization device used in thoracoscopic surgery;

[0021] Figure 4 A device for locating lung nodules in thoracoscopic surgery Figure 3 Enlarged structural diagram at point A;

[0022] Figure 5 A schematic cross-sectional view of the top of a lung nodule localization device used in thoracoscopic surgery;

[0023] Figure 6 This is a schematic diagram of the structure of a lung nodule positioning device used in thoracoscopic surgery after the anchoring and positioning needle has been bent.

[0024] In the picture:

[0025] 1. Puncture needle syringe; 2. Puncture needle tip; 3. Positioning line; 4. Cylinder; 5. Anchoring positioning needle; 6. Pushing device; 7. Moving part; 8. Slide groove; 9. First spring; 10. Groove; 11. Fixed shaft; 12. First movable plate; 13. Second spring; 14. Limiting shaft; 15. Slot; 16. Spring plate; 17. Second movable plate; 18. Fixed plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] This invention provides a lung nodule localization device for thoracoscopic surgery, such as... Figure 1-6 As shown, a lung nodule localization device for thoracoscopic surgery includes a puncture needle barrel 1 and a puncture needle head 2, which are integrally formed. A pushing device 6 is sleeved inside the puncture needle head 2 along its axial direction, and the pushing device 6 can slide along the axial direction of the puncture needle head 2 and the puncture needle barrel 1. One end of the pushing device 6 passes through the end of the puncture needle barrel 1 away from the puncture needle head 2 and protrudes outside the puncture needle barrel 1. The device also includes:

[0028] The puncture needle barrel 1 and the puncture needle tip 2 are integrally molded, which can avoid gaps at the connection between the two that could lead to air leakage, fluid accumulation or tissue damage, meeting the core requirement of low-invasiveness in thoracoscopic minimally invasive surgery. The pushing device 6 is limited to sliding along the axis of the puncture needle barrel 1 and the puncture needle tip 2, with a clear and unique direction of movement, ensuring that it can accurately push the subsequent cylinder 4 and anchoring positioning needle 5 to move along the axis, avoiding deviation that could lead to positioning errors. The design of the pushing device 6 being exposed on the outside of the puncture needle barrel 1 allows the surgeon to operate it externally without the need for additional disassembly of the device, thus improving surgical efficiency.

[0029] An ejector structure is provided on the puncture needle barrel 1 and is used to push the pusher 6 to move along the axial direction of the puncture needle barrel 1;

[0030] The ejector structure is the core power transmission component of the device, which is directly related to the reliability of the movement of the pusher 6. During thoracoscopic surgery, the surgeon needs to operate this structure externally to drive the internal positioning component to extend and limit the movement along the axis of the puncture needle barrel 1, further enhancing the directionality of movement, avoiding radial shaking of the pusher 6, and ensuring that the anchoring positioning needle 5 accurately reaches the lung nodule.

[0031] The ejection structure includes two sets of symmetrically opened grooves 8 on the outer surface of the puncture needle cylinder 1 and a movable part 7 fixed on the outer surface of the pushing device 6. The end of the movable part 7 passes through the grooves 8 and slides along the axial direction of the puncture needle cylinder 1. A first spring 9 is sleeved on the outer surface of the pushing device 6. The first spring 9 is elastically supported between the inner wall of the puncture needle cylinder 1 and the movable part 7. A slot 10 is opened on the outside of the puncture needle cylinder 1. A fixed shaft 11 is fixed inside the slot 10. A first movable plate 12 and a second spring 13 are sleeved on the outer surface of the fixed shaft 11. The second spring 13 is elastically supported between the first movable plate 12 and the inner wall of the slot 10. A limiting shaft 14 is fixed on the top of the first movable plate 12. A slot 15 is opened on the outside of the movable part 7. The limiting shaft 14 can engage with the slot 15.

[0032] The cooperation of two sets of symmetrical sliding grooves 8 and movable parts 7 can balance the force on the pushing device 6, avoid jamming or tilting caused by unilateral force, and ensure smooth sliding. The first spring 9 is elastically supported between the inner wall of the puncture needle barrel 1 and the movable part 7 to realize the pushing function. When the surgeon pushes the movable part 7, the first spring 9 is compressed. After positioning, the spring rebounds and drives the pushing device 6 to reset, which facilitates the removal of the device from the body. The cooperation of the second spring 13 with the limiting shaft 14 and the slot 15 constitutes a limiting and locking mechanism. When not in operation, the limiting shaft 14 is locked into the slot 15 to fix the movable part 7 and prevent the pushing device 6 from being accidentally triggered to extend. When in operation, the first movable plate 12 is pressed to compress the second spring 13, the limiting shaft 14 is disengaged from the slot 15, and the movable part 7 can slide along the sliding groove 8. This design improves the safety of the operation and avoids accidental triggering of the positioning action during the operation. The slot 10 provides installation space for the fixed shaft 11, the first movable plate 12, and the second spring 13, ensuring that the ejection structure is compactly integrated into the outside of the puncture needle barrel 1 without increasing the overall volume of the device.

[0033] The puncture needle tip 2 has a positioning line 3 arranged along its axial direction inside. One end of the positioning line 3 is fixed with a cylinder 4, and the end of the cylinder 4 away from the positioning line 3 is fixed with an anchoring positioning needle 5.

[0034] The positioning line 3 is the core component for marking the location of lung nodules after surgery. It is arranged along the axis of the puncture needle tip 2 to ensure that it is coaxial with the anchoring positioning needle 5 after it extends, avoiding entanglement or deviation. The cylinder 4 plays a guiding role, with one end connected to the positioning line 3 and the other end fixing the anchoring positioning needle 5. At the same time, the sliding cooperation between the cylinder 4 and the inner wall of the puncture needle tip 2 can guide the anchoring positioning needle 5 to extend smoothly. The anchoring positioning needle 5 is fixed to the end of the cylinder 4 away from the positioning line 3, ensuring that it can contact the lung tissue first and complete the anchoring. The positioning line 3 then extends synchronously, forming a complete combination of anchoring and marking.

[0035] The pushing device 6 is a hollow structure, the positioning line 3 passes through the hollow cavity of the pushing device 6, and the cylinder 4 and the puncture needle head 2 slide together along the axial direction of the puncture needle head 2.

[0036] The pushing device 6 adopts a hollow structure to accommodate the positioning line 3, avoid spatial interference between the positioning line 3 and the pushing device 6, and ensure that their movements do not affect each other. The positioning line 3 passes through the hollow cavity of the pushing device 6, which can protect the positioning line 3 from being squeezed or worn during the pushing process, and at the same time avoid entanglement with the tissue in the body, thus improving the reliability of the device. The axial sliding cooperation between the cylinder 4 and the puncture needle tip 2 further enhances the guiding effect, ensuring that the anchoring positioning needle 5 extends along the preset path and accurately reaches the target nodule.

[0037] The pushing device 6, located near the end of the puncture needle 2, can press against the end of the cylinder 4 away from the anchoring and positioning needle 5.

[0038] This coordination clearly defines the power transmission path. The axial thrust of the pushing device 6 is transmitted to the cylinder 4 through compression and contact, which in turn drives the anchoring and positioning needle 5 to extend out of the puncture needle tip 2. This limits the end of the pushing device 6 that is close to the puncture needle tip 2 to correspond and contact the end of the cylinder 4 that is away from the anchoring and positioning needle 5, avoiding the loss of thrust or directional deviation caused by contact misalignment, ensuring accurate transmission of thrust, and enabling the anchoring and positioning needle 5 to successfully break through the constraint of the puncture needle tip 2 and anchor to the lung tissue.

[0039] Among them, the movable part 7 is fixed to the side of the inner wall of the puncture needle barrel 1 by a spring sheet 16 with a second movable plate 17. The inner wall of the puncture needle barrel 1 is fixed with a fixed plate 18 corresponding to the position of the second movable plate 17. The surfaces of the second movable plate 17 and the fixed plate 18 are corrugated, and the corrugated surfaces of the second movable plate 17 and the fixed plate 18 are in contact with each other.

[0040] The spring plate 16 connects the movable part 7 and the second movable plate 17, providing elastic cushioning to prevent wear caused by hard contact between the second movable plate 17 and the fixed plate 18. The corrugated surfaces of the second movable plate 17 and the fixed plate 18 fit together to form a damping positioning structure. When the movable part 7 slides, the corrugated surfaces mesh with each other to generate moderate damping, making the sliding action smooth and controllable. This prevents the anchoring pin 5 from popping out quickly due to the elasticity of the first spring 9 or excessive force from the surgeon's operation, which could damage lung tissue. The damping force can temporarily fix the movable part 7 in any position, making it easier for the surgeon to adjust the positioning depth and improve positioning accuracy.

[0041] The first spring 9 is elastically supported between the inner wall of the puncture needle barrel 1 and the side of the second movable plate 17 away from the spring plate 16.

[0042] The specific support position of the first spring 9 is clearly defined: one end abuts against the inner wall of the puncture needle syringe 1, and the other end abuts against the side of the second movable plate 17 away from the spring plate 16. This ensures that the spring force can directly act on the second movable plate 17, thereby driving the movable part 7 and the pushing device 6 to reset. This support method avoids the local stress concentration caused by the spring force of the first spring 9 acting directly on the movable part 7, extends the service life of the movable part 7 and the pushing device 6, makes the spring force transmission path more stable, ensures the smoothness of the resetting action of the pushing device 6, and avoids the impact during resetting that could cause the device to shake or irritate the tissues inside the body.

[0043] Among them, the anchoring and positioning pin 5 is made of shape memory alloy. When the anchoring and positioning pin 5 is housed inside the puncture needle head 2, it is in a straight state, and when it is separated from the puncture needle head 2, it is in a naturally curved state.

[0044] The anchoring and positioning needle 5 is made of shape memory alloy. During thoracoscopic surgery, the puncture needle 2 needs to be inserted into the body through a minimally invasive incision. When the anchoring and positioning needle 5 is retracted, it is in a straight state, which can reduce the outer diameter of the puncture needle 2 and reduce tissue damage. The anchoring and positioning needle 5 straightens when retracted into the puncture needle 2 and bends when separated, achieving the anchoring effect. After being extended from the puncture needle 2, it returns to its natural curved shape under body temperature, which can firmly hook the lung tissue and prevent the anchoring and positioning needle 5 from shifting or falling off. The shape memory alloy has good biocompatibility, which can reduce the rejection reaction of the body's tissues to the anchoring and positioning needle 5, improve the biosafety of the device, and the shape change is triggered by body temperature, requiring no additional operation, simplifying the surgical procedure and improving positioning efficiency.

[0045] Working principle: Before surgery, the anchoring and positioning needle 5 is housed inside the puncture needle tip 2 in a straight state. The limiting shaft 14, under the elastic support of the second spring 13, is locked into the slot 15 of the movable part 7, thus locking the pushing device 6 and preventing accidental triggering. During surgery, the surgeon inserts the one-piece puncture needle barrel 1 and the puncture needle tip 2 into the body through a minimally invasive incision. After aligning the puncture needle tip 2 with the target location of the lung nodule, the surgeon presses the first movable plate 12 to compress the second spring 13, causing the limiting shaft 14 to disengage from the slot 15. After unlocking, the movable part 7 is pushed to slide axially along the groove 8 on the outer surface of the puncture needle barrel 1. Simultaneously, the movable part 7 drives the pushing device 6 to move axially along the puncture needle tip 2. The end of the pushing device 6 closest to the puncture needle tip 2 presses against the cylinder 4, thereby pushing the cylinder 4 to extend the anchoring and positioning needle 5 out of the puncture needle tip 2. After the anchoring and positioning needle 5 is released from the constraint of the puncture needle tip 2, it returns to the natural bending shape of the shape memory alloy under body temperature. The positioning line 3, which is firmly anchored to the tissue surrounding the lung nodule and is fixedly connected to the cylinder 4, extends synchronously with the anchoring positioning needle 5, extends along the hollow cavity of the pushing device 6 and protrudes into the body, forming a marker of the lung nodule's location. During the pushing process, the movable part 7 drives the second movable plate 17 to move synchronously through the spring plate 16. The second movable plate 17 and the fixed plate 18 on the inner wall of the puncture needle barrel 1 abut against each other through the corrugated surface to generate damping force, making the pushing action smooth and controllable, and facilitating the surgeon to adjust the positioning depth. The first spring 9 on the outer surface of the pushing device 6 is compressed to store elastic potential energy. After positioning is completed, the surgeon releases the movable part 7, and the first spring 9 elastically rebounds, causing the movable part 7 and the pushing device 6 to reset. The corrugated surface of the second movable plate 17 engages with the fixed plate 18 to assist in positioning and resetting the position. Then, the puncture needle barrel 1 and the puncture needle tip 2 are withdrawn from the body, leaving the positioning line 3 in the body to provide a clear lung nodule positioning marker for subsequent surgery.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lung nodule localization device for thoracoscopic surgery, comprising an integrally formed puncture needle barrel (1) and puncture needle tip (2), wherein a pushing device (6) is sleeved inside the puncture needle tip (2) along its axial direction, and the pushing device (6) is slidable along the axial direction of the puncture needle tip (2) and the puncture needle barrel (1), one end of the pushing device (6) extends through the end of the puncture needle barrel (1) away from the puncture needle tip (2) and protrudes outside the puncture needle barrel (1), characterized in that, Also includes: The ejector structure is disposed on the puncture needle barrel (1) and is used to push the pusher (6) to move along the axial direction of the puncture needle barrel (1); The ejection structure includes two sets of symmetrically opened grooves (8) on the outer surface of the puncture needle cylinder (1) and a movable part (7) fixed on the outer surface of the pushing device (6). The end of the movable part (7) extends out of the groove (8) and slides with the groove (8) along the axial direction of the puncture needle cylinder (1). A first spring (9) is sleeved on the outer surface of the pushing device (6). The first spring (9) is elastically supported between the inner wall of the puncture needle cylinder (1) and the movable part (7). The outer surface of the puncture needle cylinder (1) is opened... A slot (10) is provided, and a fixed shaft (11) is fixed inside the slot (10). A first movable plate (12) and a second spring (13) are sleeved on the outer surface of the fixed shaft (11). The second spring (13) is elastically supported between the first movable plate (12) and the inner wall of the slot (10). A limiting shaft (14) is fixed on the top of the first movable plate (12). A slot (15) is provided on the outside of the movable part (7). The limiting shaft (14) can engage with the slot (15).

2. The lung nodule localization device for thoracoscopic surgery according to claim 1, characterized in that: The puncture needle tip (2) has a positioning line (3) arranged along its axial direction inside. A cylinder (4) is fixed at one end of the positioning line (3), and an anchoring positioning needle (5) is fixed at the end of the cylinder (4) away from the positioning line (3).

3. The lung nodule localization device for thoracoscopic surgery according to claim 2, characterized in that: The pushing device (6) is a hollow structure, the positioning line (3) passes through the hollow cavity of the pushing device (6), and the cylinder (4) and the puncture needle tip (2) slide together along the axial direction of the puncture needle tip (2).

4. A lung nodule localization device for thoracoscopic surgery according to claim 2, characterized in that: The pushing device (6) is located near the end of the puncture needle (2) and can press against the end of the cylinder (4) away from the anchoring and positioning needle (5).

5. A lung nodule localization device for thoracoscopic surgery according to claim 1, characterized in that: The movable part (7) is fixed with a second movable plate (17) on the side near the inner wall of the puncture needle barrel (1) by a spring sheet (16). A fixed plate (18) is fixed on the inner wall of the puncture needle barrel (1) at the position corresponding to the second movable plate (17). The surfaces of the second movable plate (17) and the fixed plate (18) are both corrugated, and the corrugated surfaces of the second movable plate (17) and the fixed plate (18) are in contact with each other.

6. A lung nodule localization device for thoracoscopic surgery according to claim 5, characterized in that: The first spring (9) is elastically supported between the inner wall of the puncture needle barrel (1) and the side of the second movable plate (17) away from the spring plate (16).

7. A lung nodule localization device for thoracoscopic surgery according to claim 2, characterized in that: The anchoring and positioning needle (5) is made of shape memory alloy. When the anchoring and positioning needle (5) is housed inside the puncture needle head (2), it is in a straight state and when it is separated from the puncture needle head (2), it is in a naturally curved state.

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