An absorbable lung localization needle that is easily retrievable

Abstract

The present application relates to the technical field of medical apparatus and instruments, and discloses an absorbable lung positioning needle easy to recycle, which comprises a needle tube and a connecting line, the connecting line is slidably connected in the inside of the needle tube, one end of the connecting line is provided with a positioning hook, the positioning hook is located at the needle tip end of the needle tube, the connecting line is made of degradable material, the positioning hook is made of material which does not produce rejection reaction with human body, the outside of the needle tube is provided with an auxiliary positioning mechanism, the auxiliary positioning mechanism comprises a movable sleeve, the movable sleeve is sleeved on the outside of the needle tube, and the inside of the movable sleeve is provided with a rubber ring. The puncture depth is determined by adjusting the movable sleeve, so that the puncture accuracy is guaranteed. When the intraoperative positioning deviation occurs, the control part can be pulled back, so that the positioning hook is retracted into the needle tube, the positioning operation is reperformed, the one-time limitation of the traditional positioning mode is changed, the positioning fault tolerance is greatly improved, the target position of the lung can be accurately marked, and reliable guarantee is provided for the smooth development of the operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an easily retrievable absorbable lung positioning needle. Background Technology

[0002] With the increasing incidence of lung cancer, people are paying more and more attention to early screening for lung cancer, leading to an increase in the detection rate and surgical volume of early-stage lung cancer. Changes in people's health awareness have also led to advancements in surgical techniques, from open-chest surgery to video-assisted thoracoscopic surgery (VATS) and now to minimally invasive laparoscopic surgery. Surgical procedures are becoming increasingly precise, resulting in less trauma for patients, but the demands on surgical techniques are also rising. Therefore, to meet the increasing need for precision surgery, accurate preoperative localization of lung lesions is crucial. This technique concerns the precise location of the surgical area; accurate localization can significantly shorten surgical time and reduce surgical trauma.

[0003] Because lung nodule localization technology is quite advanced, various types of localization needles are currently available, and there is no unified standard. Therefore, some design flaws are inevitable. For example, current localization needles have the following defects: once released, the needle cannot be moved; if the positioning deviates, the marked position cannot be adjusted, making precise positioning surgery impossible; currently, the localization needle is made of a metallic foreign object, which cannot remain inside the human body for extended periods. Therefore, this invention provides an easily retrievable absorbable lung localization needle to address the shortcomings of existing technologies. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an easily retrievable absorbable lung positioning needle, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an easily recyclable absorbable lung positioning needle, comprising a needle tube and a connecting wire, wherein the connecting wire is slidably connected inside the needle tube, and a positioning hook is provided at one end of the connecting wire, the positioning hook being located at the needle tip end of the needle tube, the connecting wire being made of a biodegradable material, and the positioning hook being made of a material that does not produce an allergic reaction with the human body.

[0006] Preferably, an auxiliary positioning mechanism is provided on the outside of the needle tube. The auxiliary positioning mechanism includes a movable sleeve, which is fitted over the outside of the needle tube. A rubber ring is provided on the inner side of the movable sleeve, and the inner side of the rubber ring is in contact with the outer side of the needle tube.

[0007] Preferably, the needle tube has multiple graduated rings equidistantly arranged on its outer side.

[0008] Preferably, a fixing plate is fixedly connected to the other end of the needle tube, a connecting seat is fixedly connected to the outside of the fixing plate, and a protective mechanism is provided at one end of the connecting seat.

[0009] Preferably, the protective mechanism includes two combined plates and a protective cover, with one end of the two combined plates fixedly connected to the outside of the connecting seat, and the outside of the protective cover fitting against the outside of the two combined plates.

[0010] Preferably, two T-shaped strips are fixedly connected to the outer side of the protective cover, and a T-shaped groove is provided inside the combined plate. The outer side of the T-shaped strips is slidably connected to the inner side of the T-shaped groove.

[0011] Preferably, a pressing block is fixedly connected to the other end of the connecting line, and a connecting block is fixedly connected to the outside of the pressing block.

[0012] Preferably, a shrink plate is fixedly connected to the outer side of the connecting block, and one end of the shrink plate is fixedly connected to the outer side of the connecting seat.

[0013] This invention provides an easily retrievable absorbable lung positioning needle. It has the following beneficial effects: 1. This invention has a precise and adjustable positioning mechanism. Before the operation, the position of the foreign body is confirmed by imaging, and the puncture depth is determined by adjusting the movable sleeve accordingly, ensuring the accuracy of the puncture. If the positioning deviates during the operation, the control component can be pulled back to retract the positioning hook into the needle tube and the positioning operation can be repeated. This changes the one-time limitation of the traditional positioning method, greatly improves the positioning error tolerance, and ensures that the target position of the lung can be accurately marked, providing a reliable guarantee for the smooth operation.

[0014] 2. The positioning hook of this invention is made of a special material with excellent biocompatibility with the human body. The surface oxide film forms a barrier, which can effectively avoid rejection reactions in the human body, reduce the risk of postoperative complications, and ensure the quality of patient recovery. The connecting line is made of biodegradable material and can be completely absorbed by the human body within a few weeks after the operation. This solves the problem of the positioning needle not being able to be removed when surgery is not possible due to force majeure, eliminates potential risks and pain for patients, and improves surgical safety and patient treatment experience. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the shrink plate structure of the present invention; Figure 4 This is a schematic diagram of the protective mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the fixed disk of the present invention; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0016] The components include: 1. Needle tube; 2. Auxiliary positioning mechanism; 201. Movable sleeve; 202. Rubber ring; 203. Scale ring; 3. Fixed plate; 4. Connecting seat; 5. Protective mechanism; 501. Combination plate; 502. T-slot; 503. Protective cover; 504. T-strip; 6. Connecting line; 7. Positioning hook; 8. Pressing block; 9. Connecting block; 10. Shrink plate. Detailed Implementation

[0017] The technical solutions in 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.

[0018] Please see the appendix Figure 1 -Appendix Figure 7 This invention provides an easily retrievable absorbable lung positioning needle, comprising a needle tube 1 and a connecting line 6. Before surgical operation, each component needs to be prepared to ensure the positioning needle functions accurately and safely. The connecting line 6 is slidably connected inside the needle tube 1, with a positioning hook 7 at one end, located at the needle tip of the needle tube 1. A movable sleeve 201 is tightly fitted to the needle tube 1 via an inner rubber ring 202. Due to the frictional force of the rubber ring 202, the movable sleeve 201 can be stably fitted at different positions on the needle tube 1. Based on the distance information between the lung foreign body and the patient's skin surface determined by X-ray, medical personnel slide the movable sleeve 201 along the outer side of the needle tube 1. When the movable sleeve 201 moves to the appropriate position indicated by the corresponding graduated ring 203, the movement can be stopped. The graduated rings 203 are evenly distributed on the outer side of the needle tube 1, providing a precise reference for the positioning of the movable sleeve 201 and ensuring the accuracy of the puncture depth. The connecting wire 6 is made of biodegradable material, the positioning hook 7 is made of material that does not cause rejection by the human body, and an auxiliary positioning mechanism 2 is provided on the outside of the needle tube 1. The auxiliary positioning mechanism 2 includes a movable sleeve 201, which is fitted on the outside of the needle tube 1. A rubber ring 202 is provided on the inside of the movable sleeve 201, and the inside of the rubber ring 202 fits against the outside of the needle tube 1. Multiple graduated rings 203 are equidistantly arranged on the outside of the needle tube 1. The fixing plate 3 is securely connected to the other end of the needle tube 1, providing a stable grip and operating base for the entire device. The connecting seat 4 is fixed to the outside of the fixing plate 3, and its function is to connect the protective mechanism 5, ensuring that the protective mechanism 5 can be stably installed on the entire device. One end of the two combined plates 501 in the protective mechanism 5 is fixedly connected to the outside of the connecting seat 4, forming a stable frame structure. The protective cover 503 is slidably connected to the T-shaped groove 502 inside the combined plate 501 through the outer T-shaped strip 504. This connection method ensures that the protective cover 503 can be easily pulled out and inserted, and when the protective cover 503 is in the closed state, it fits tightly against the outside of the two combined plates 501, providing good protection for the pressing block 8 and preventing the pressing block 8 from being accidentally touched or damaged during transportation, storage or preoperative preparation, ensuring the integrity and safety of the positioning needle before use. The other end of the needle tube 1 is fixedly connected to a fixing plate 3. A connecting seat 4 is fixedly connected to the outside of the fixing plate 3. A protective mechanism 5 is provided at one end of the connecting seat 4. The protective mechanism 5 includes two combined plates 501 and a protective cover 503. One end of the two combined plates 501 is fixedly connected to the outside of the connecting seat 4. The outside of the protective cover 503 is in contact with the outside of the two combined plates 501. Two T-shaped strips 504 are fixedly connected to the outside of the protective cover 503. A T-shaped groove 502 is opened inside the combined plate 501. The outside of the T-shaped strip 504 is slidably connected to the inside of the T-shaped groove 502. During the puncture procedure, the medical staff holds the needle tube 1, precisely aligning the needle tip with the marked location on the patient's skin, and then smoothly performs the puncture. As the needle tube 1 gradually penetrates the patient's body, when the movable sleeve 201 contacts the patient's skin, it indicates that the puncture depth has reached the pre-planned appropriate depth, and the puncture can be stopped at this point. Next, the medical staff pulls the protective cover 503 upwards along the T-shaped groove 502, fully exposing the pressing block 8. At this time, the doctor's operating posture is as follows: pinch the outside of the needle tube 1 with your fingers to stabilize the needle tube, and hook the outside of the fixing plate 3 with your index and middle fingers to form a stable grip structure, and then press the pressing block 8 with the fingers of the other hand. The pressing block 8 is fixedly connected to the connecting line 6. When the pressing block 8 is pressed, it will cause the connecting line 6 to slide rapidly inside the needle tube 1, and then the connecting line 6 will pull the positioning hook 7 to quickly release from the needle tip end of the needle tube 1. The positioning hook 7 is made of nickel-titanium alloy, which has unique shape memory properties and super elasticity. Under body temperature conditions, the nickel-titanium alloy positioning hook 7 maintains a stable shape. Its shape memory properties allow it to quickly return to the preset hook shape after release, effectively anchoring it to the target location in the lung. Simultaneously, its superelasticity allows the positioning hook 7 to elastically deform under certain external forces, preventing excessive damage to lung tissue due to excessive rigidity. It also returns to its original shape after the external force is removed, ensuring positioning stability. Furthermore, a dense titanium dioxide oxide film forms on the surface of the nickel-titanium alloy. This oxide film acts as a physical and chemical barrier, giving the nickel-titanium alloy excellent biocompatibility. Compared to the clinical reference material AISI 316L stainless steel, the nickel-titanium alloy has no cytotoxicity, neurotoxicity, genotoxicity, or allergenicity. Its stress-strain behavior is very similar to that of bones and tendons, thus it is highly compatible with human tissue, greatly reducing the risk of rejection and improving surgical safety and postoperative recovery quality. The other end of the connecting line 6 is fixedly connected to a pressing block 8. A connecting block 9 is fixedly connected to the outside of the pressing block 8, and a shrink plate 10 is fixedly connected to the outside of the connecting block 9. One end of the shrink plate 10 is fixedly connected to the outside of the connecting seat 4. If a positioning deviation is detected during the positioning process, the doctor can promptly pull the pressing block 8 back. The pull-back action of the pressing block 8 is transmitted to the shrink plate 10 through the connecting block 9. The shrink plate 10 is fixedly connected to the outside of the connecting seat 4, serving to stabilize the pressing block 8 and assist in controlling the movement of the connecting line 6. When the pressing block 8 is pulled back, the connecting line 6 is pulled back inside the needle tube 1, thereby causing the positioning hook 7 to retract back into the needle tube 1. At this time, the doctor can readjust the position of the needle tube 1 and perform the positioning operation again. This repeatable positioning design is more error-tolerant than the single-operation positioning method, greatly improving the accuracy of positioning and the success rate of the surgery. Furthermore, the connecting suture 6 is made of polyglycolic acid (PLA), a protein suture that is absorbable. Within weeks after the surgery, the body's own metabolic and absorption mechanisms begin to work on the connecting suture 6. Enzymes in the body gradually break down the PLA protein suture. As the breakdown process continues, the body loses interest in the gradually fragmented suture and eventually absorbs it completely. This absorbable characteristic avoids the clinical problem of the positioning needle left in the patient's lung before surgery being unable to be removed due to unforeseen circumstances, such as a sudden deterioration of the patient's condition preventing surgery. This reduces the subsequent risks and suffering faced by the patient and provides a more reliable guarantee for the patient's treatment process.

[0019] Specifically, firstly, the distance between the foreign object in the lung and the patient's skin needs to be accurately confirmed using imaging techniques such as X-rays. This step is crucial because it provides precise data for the subsequent puncture depth. Based on the obtained distance information, medical staff begin to move the movable sleeve 201. The movable sleeve 201 is fitted over the outside of the needle tube 1, and its inner rubber ring 202 fits tightly against the needle tube 1. The friction generated allows the movable sleeve 201 to remain stably in the set position. Medical staff move the movable sleeve 201 along the outside of the needle tube 1. The graduated rings 203 evenly distributed on the outside of the needle tube 1 help medical staff to accurately move the movable sleeve 201 to the corresponding graduated position. The effect of this step is to pre-set the puncture depth. When the needle tube 1 is subsequently inserted into the patient's body, once the movable sleeve 201 contacts the patient's skin, it means that the puncture depth has reached the pre-planned appropriate depth, thus ensuring the accuracy of the puncture operation and avoiding unnecessary harm to the patient caused by punctures that are too deep or too shallow. Next, the needle tip of needle 1 is aligned with the marked location on the patient's skin for puncture. During the puncture, the medical staff must keep their hands steady and slowly and precisely advance needle 1. When the movable sleeve 201 contacts the patient's skin, the puncture operation is paused, at which point the puncture depth is as expected. Then, the protective cover 503 is operated. The protective cover 503 is slidably connected to the T-shaped groove 502 inside the combination plate 501 via the outer T-shaped strip 504. The medical staff pulls the protective cover 503 upwards, exposing the pressure block 8. This operation is to allow the doctor to easily operate the pressure block 8, as the pressure block 8 will play a crucial role in the positioning process. If the protective cover 503 is not opened, the pressure block 8 will be obstructed, making subsequent positioning operations impossible. Subsequently, the doctor releases the positioning hook 7. With one hand, the doctor pinches the outside of the needle tube 1 to stabilize it and prevent it from shaking during the procedure, thus ensuring positioning accuracy. Simultaneously, the doctor uses their index and middle fingers to grip the outside of the fixing plate 3, further enhancing stability and control. With the other hand, the doctor presses the pressing block 8, which is fixedly connected to the connecting line 6. The pressing action causes the connecting line 6 to slide rapidly inside the needle tube 1, pulling the positioning hook 7 out of the needle tip of the needle tube 1. The positioning hook 7 is made of nickel-titanium alloy, possessing unique shape memory properties and superelasticity. Under body temperature, its shape memory properties allow the positioning hook 7 to quickly return to its preset hook shape after release, firmly anchoring it at the target location in the lung. Its superelasticity allows it to deform elastically when subjected to external force, avoiding damage to lung tissue, and it returns to its original shape after the force is removed, ensuring stable and safe positioning. This operation achieves precise positioning of the target location in the lung, providing a reliable marker for subsequent surgery. If a deviation is detected during positioning, the doctor can promptly pull the pressure block 8 back. The pressure block 8 is connected to the retraction plate 10 via the connecting block 9. One end of the retraction plate 10 is fixed to the outside of the connecting seat 4. When the pressure block 8 is pulled back, the force is transmitted to the connecting line 6 through this connection structure, causing the connecting line 6 to be pulled back inside the needle tube 1, which in turn drives the positioning hook 7 to retract back into the needle tube 1. This repeatable design greatly improves the fault tolerance of positioning. The doctor can readjust the position of the needle tube 1 and perform the positioning operation again until an accurate positioning effect is achieved, effectively avoiding the increased surgical risk caused by a single positioning failure. Finally, regarding the advantages brought by the material properties of the connecting suture 6 and the positioning hook 7: The positioning hook 7 is made of nickel-titanium alloy, and the dense titanium dioxide oxide film formed on its surface acts as a physical and chemical barrier, exhibiting excellent biocompatibility. Compared with traditional metal materials, it greatly avoids the occurrence of rejection reactions in the human body, ensuring the quality of postoperative recovery for patients. The connecting suture 6 is made of polyglycolic acid (PLA), a protein suture, which is absorbable. Within several weeks after the surgery, enzymes in the body will gradually break down the PLA protein suture, and as the decomposition process continues, the body will eventually completely absorb it. This absorbable characteristic effectively avoids the clinical problem of the positioning needle left in the patient's lung before surgery being unable to be removed when surgery is impossible due to force majeure factors, eliminating the potential risks and suffering faced by the patient afterward.

[0020] Working principle: During a lung puncture and localization procedure, the needle tip of the needle tube 1 is aligned with the marked location on the patient's skin. Beforehand, an X-ray is used to confirm the distance between the foreign object in the lung and the patient's skin surface. The movable sleeve 201 is then moved to the appropriate position. After the needle tube 1 is inserted into the patient's body, the movable sleeve 201 contacts the patient's skin, ensuring the puncture reaches the appropriate depth. Then, the protective cover 503 can be pulled upwards, exposing the pressure block 8. The doctor can then pinch the outside of the needle tube 1, and use their index and middle fingers to hold the outside of the fixing plate 3, and press the pressure block. 8. This allows the connecting line 6 to quickly release the positioning hook 7. If a positioning deviation occurs, the pressing block 8 can be pulled back, causing the connecting line 6 to pull the positioning hook 7 back into the needle tube 1 for repositioning. This method is more forgiving than one-time positioning. Furthermore, the positioning hook 7 is made of nickel-titanium alloy, which avoids rejection reactions in the human body compared to traditional metal materials. In addition, the connecting line 6 is made of polyhydroxyacetic acid (PLA) protein thread, which can be absorbed by the human body within a few weeks, avoiding the clinical problem of being unable to perform surgery due to force majeure factors, but being unable to remove the positioning needle that was left in the patient's lung before surgery.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An easily retrievable absorbable lung positioning needle, characterized in that, It includes a needle tube (1) and a connecting line (6). The connecting line (6) is slidably connected inside the needle tube (1). One end of the connecting line (6) is provided with a positioning hook (7). The positioning hook (7) is located at the needle tip end of the needle tube (1). The connecting line (6) is made of a biodegradable material, and the positioning hook (7) is made of a material that does not cause rejection reaction with the human body.

2. The easily retrievable absorbable lung positioning needle according to claim 1, characterized in that, An auxiliary positioning mechanism (2) is provided on the outside of the needle tube (1). The auxiliary positioning mechanism (2) includes a movable sleeve (201), which is sleeved on the outside of the needle tube (1). A rubber ring (202) is provided on the inside of the movable sleeve (201), and the inside of the rubber ring (202) is in contact with the outside of the needle tube (1).

3. The easily retrievable absorbable lung positioning needle according to claim 2, characterized in that, The needle (1) has multiple graduated rings (203) evenly spaced on its outer side.

4. The easily retrievable absorbable lung positioning needle according to claim 1, characterized in that, The other end of the needle tube (1) is fixedly connected to a fixing plate (3), and a connecting seat (4) is fixedly connected to the outside of the fixing plate (3). A protective mechanism (5) is provided at one end of the connecting seat (4).

5. The easily retrievable absorbable lung positioning needle according to claim 4, characterized in that, The protective mechanism (5) includes two combined plates (501) and a protective cover (503). One end of the two combined plates (501) is fixedly connected to the outside of the connecting seat (4), and the outside of the protective cover (503) is in contact with the outside of the two combined plates (501).

6. The easily retrievable absorbable lung positioning needle according to claim 5, characterized in that, The protective cover (503) has two T-shaped strips (504) fixedly connected to its outer side, and the combined plate (501) has a T-shaped groove (502) inside. The outer side of the T-shaped strip (504) is slidably connected to the inner side of the T-shaped groove (502).

7. The easily retrievable absorbable lung positioning needle according to claim 1, characterized in that, The other end of the connecting line (6) is fixedly connected to a pressing block (8), and a connecting block (9) is fixedly connected to the outside of the pressing block (8).

8. The easily retrievable absorbable lung positioning needle according to claim 7, characterized in that, A shrink plate (10) is fixedly connected to the outside of the connecting block (9), and one end of the shrink plate (10) is fixedly connected to the outside of the connecting seat (4).

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