In-situ rotary cutting prostate biopsy gun head and sampling method thereof

Abstract

The application discloses a prostate puncture gun head for in-situ rotary cutting and a sampling method thereof, and belongs to the technical field of urological surgery. The needle head is arranged at the front end of the puncture gun and is used for penetrating into the prostate tissue; the blade groove is semicircular and is arranged along the longitudinal direction of the needle head; the blade is rotatably arranged in the blade groove and rotates along the track of the blade groove; the tissue groove is arranged on the surface of the needle head and is used for collecting the cut tissue sample; the knob spring device is connected with the blade and is used for providing rotary power to drive the blade to rotate and cut the prostate tissue along the blade groove. The knob spring device is used for driving the blade to rotate and move along the track of the semicircular blade groove, in-situ rotary cutting and sampling of the prostate tissue are realized, tissue tearing is effectively reduced, the flatness of the cutting surface is ensured, and the accuracy and efficiency of the sampling process are improved.

Description

Technical Field

[0001] This invention relates to the field of urological medical technology, specifically to an in-situ rotary cutting prostate puncture tip and its sampling method, used for prostate puncture. Background Technology

[0002] Prostate biopsy is currently one of the important methods for diagnosing prostate cancer in clinical practice. Through puncture sampling, prostate tissue can be effectively obtained for further pathological examination to confirm the presence of malignant tumors. At present, the prostate biopsy equipment widely used in clinical practice mainly adopts a puncture gun structure, with the puncture gun tip as its core component. Traditional puncture guns are generally controlled electrically or manually during the sampling process. When the switch is pressed, the spring is quickly released, driving the transmission mechanism to move the puncture needle and cutting sleeve forward at high speed, piercing into the prostate tissue and completing the cutting and sampling instantly.

[0003] Current biopsy needles use a single forward-firing method, where the needle is fired at high speed into the target area parallel to the puncture channel. While this method ensures the needle reaches the target area quickly and completes tissue sampling, it carries significant potential risks in certain situations, especially when the prostate tumor lesion is located near the base of the prostate (i.e., close to the bladder).

[0004] Specifically, when a prostate lesion is close to the bladder, the puncture needle, during high-speed firing, can easily penetrate the prostate capsule and accidentally enter the bladder, potentially puncturing the bladder wall and causing bladder injury, leading to serious complications such as hematuria, infection, or even bladder perforation. Furthermore, excessively deep punctures may also damage surrounding important structures, such as the rectum and blood vessels, further increasing the risk of the procedure. Therefore, while current puncture gun designs ensure sampling efficiency, they still have safety limitations, especially when dealing with suspected prostate lesions deep within or near the bladder, where the risks are particularly pronounced.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] The purpose of this invention is to provide an in-situ rotary cutting prostate biopsy nozzle and its sampling method, which changes the original forward firing method of the biopsy nozzle to in-situ rotary cutting sampling, thus helping to reduce the risk of exceeding the target tissue when firing too deeply forward.

[0007] To solve the above problems, the present invention adopts the following technical solution: An in-situ rotary cutting prostate biopsy tip, including The needle, located at the tip of the puncture gun, is used to pierce the prostate tissue; The blade groove is semi-circular and is arranged longitudinally along the needle tip; The blade is rotatably mounted in the blade groove and rotates 0-180° along the trajectory of the blade groove; A tissue groove, located on the surface of the needle tip, is used to collect tissue samples after cutting. A knob spring device, connected to the blade, is used to provide rotational power to drive the blade to rotate along the blade groove to cut prostate tissue.

[0008] In a further embodiment, the knob spring device includes a torsion spring, an operating handle, a fixing plate, and a transmission rod assembly. The fixing plate is provided with a through hole, and the operating handle is provided with a protrusion. One end of the transmission rod assembly passes through the through hole in the fixed plate and connects to the blade. The other end of the transmission rod assembly is connected to the operating handle. The torsion spring is sleeved on the outer ring of the transmission rod assembly between the operating handle and the fixed plate. One end of the torsion spring is fixedly mounted on the fixed plate, and the other end is fixedly mounted on the operating handle. Rotating the operating handle causes the torsion spring to undergo torsional deformation. After storing elastic potential energy, the protrusion on the operating handle is locked by a switch.

[0009] The above technical solution provides rotational power to the blade and enables one-button start-up, improving the convenience and precision of operation.

[0010] In a further embodiment, the arcuate profile of the blade matches the opening profile of the tissue groove. After the blade completes the rotary cutting, its cutting surface faces the tissue groove and completely covers the opening of the tissue groove, thereby achieving the closure of the tissue groove.

[0011] The above technical solutions ensure the integrity and sterility of the cut tissue samples, facilitating subsequent pathological analysis.

[0012] In a further embodiment, the blade is an arc-shaped cutting edge.

[0013] The above technical solutions improve the cutting efficiency during rotary cutting, while also contributing to a smooth cutting surface, enhancing the quality and integrity of tissue samples, and increasing the accuracy of pathological examination results.

[0014] In a further embodiment, the needle is selected as 18G specification.

[0015] The above technical solution achieves a needle diameter that balances sampling efficiency and small incision, reducing damage to patient tissues and improving safety.

[0016] In a further embodiment, the transmission rod assembly is mounted on a bearing, and the transmission rod assembly rotates along the bearing. The bearing provides support for the rotation of the transmission rod assembly, ensuring the stability of the transmission rod assembly driving the blade to perform rotary cutting.

[0017] In a further embodiment, the switch includes a locking lever, a locking block, a locking groove, a spring, and a limiting lever; The locking block is disposed on the outer wall of the piercing gun head. The locking block has a locking groove, and the locking groove has a locking rod. One end of the locking rod is fixedly disposed at the bottom end of the locking groove, and the other end is slidably disposed in the groove of the limiting rod. One end of the limiting rod is located in the locking groove, and the other end extends out of the locking groove. A spring is provided between the bottom end of the limiting rod and the bottom end of the locking groove. The spring is sleeved on the locking rod. In its natural state, the limiting rod extends out of the locking groove to limit the protrusion on the operating handle.

[0018] Through the above technical solution, in the natural state, the limiting rod can limit and lock the protrusion on the operating handle, ensuring that the torsion spring on the operating handle undergoes torsional deformation and stores sufficient elastic potential energy. When in-situ cutting is required, pressing the limiting rod releases the limitation on the protrusion on the operating handle. Then, under the action of the elastic potential energy of the torsion spring, the operating handle drives the transmission rod assembly connected to the operating handle, thereby driving the blade to rotate and cut.

[0019] This invention also provides a sampling method using a prostate biopsy nozzle with in-situ rotational cutting, comprising the following steps: S1. Insert the needle of the puncture gun into the target lesion area; S2. By operating the switch on the outer wall of the piercing gun head and pressing the limit rod, the limit rod moves along the locking groove and compresses the spring. When the top of the limit rod is flush with the surface of the locking block, the limit rod is fully retracted into the locking groove. The limit rod releases the limit on the protrusion on the operating handle, and the torsion spring releases the stored torsion force, which drives the operating handle and the transmission rod assembly to drive the blade to rotate 180° along the semi-circular blade groove trajectory to cut the target tissue. S3. The cut tissue sample is collected into the tissue groove. The blade is facing the tissue groove and completely covers the opening of the tissue groove to seal the tissue groove and complete the sampling process. S4. After sampling is completed, rotate the operating handle in the opposite direction to drive the blade back into the blade groove. The limit rod extends out of the locking groove under the elastic force of the spring and relocks the protrusion on the operating handle.

[0020] Beneficial effects: This invention uses a knob and spring device to drive the blade to rotate along a semi-circular blade groove trajectory, achieving in-situ rotational cutting and sampling of prostate tissue. This effectively reduces tissue tearing, ensures the smoothness of the cutting surface, and improves the accuracy, efficiency, and safety of the sampling process. It avoids the situation where existing puncture needles, during high-speed firing, easily penetrate the prostate capsule and accidentally enter the bladder, potentially puncturing the bladder wall, causing bladder damage, hematuria, infection, or even serious complications such as bladder perforation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sagittal plane structure of the puncture gun head in this invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the limiting rod locking the protrusion. Figure 4 This is a schematic diagram of the coronal plane structure of the piercing gun head when it is extending. Figure 5 This is a schematic diagram of the coronal plane structure of the piercing gun head when it retracts in this invention; Reference numerals: 1. Needle; 2. Tissue groove; 3. Blade groove; 4. Knob spring device; 401. Torsion spring; 402. Operating handle; 403. Fixing plate; 404. Transmission rod assembly; 405. Through hole; 406. Raised strip; 5. Bearing; 6. Blade; 7. Blade exit direction; 8. Switch; 801. Locking rod; 802. Locking block; 803. Locking groove; 804. Spring; 805. Limiting rod; 806. Groove; 9. Outer wall of puncture gun head. Detailed Implementation

[0022] 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.

[0023] To address the problem that existing prostate biopsy guns may puncture the bladder wall when sampling near the bladder, leading to bladder damage, hematuria, infection, or even serious complications such as bladder perforation, this application proposes an in-situ rotating cutting prostate biopsy gun tip and its sampling method, changing the original forward firing method of the biopsy gun tip to in-situ firing.

[0024] The present invention will now be described in conjunction with specific embodiments.

[0025] like Figures 1 to 5As shown, this embodiment provides an in-situ rotary cutting prostate biopsy gun tip, comprising a needle 1, a blade groove 3, a blade 6, a tissue groove 2, and a knob spring device 4. The needle 1 is located at the front end of the biopsy gun. The blade groove 3 is longitudinally arranged along the needle 1, and its coronal plane is semi-circular. The blade 6 is rotatably mounted within the blade groove 3 and performs rotary cutting along a 0-180° trajectory, achieving in-situ rotary cutting sampling of prostate tissue. This improves the accuracy and efficiency of the sampling process. Simultaneously, the rotational movement of the blade 6 effectively reduces tissue tearing, ensuring the smoothness of the cut surface and facilitating the acquisition of high-quality pathological samples. The tissue groove 2 is located on the surface of the needle 1 and below the rotational trajectory of the blade 6, enabling timely and complete collection of the cut tissue, avoiding sample loss, and improving sampling efficiency and accuracy. The knob spring device 4 is connected to the blade 6, providing a stable and reliable power source to ensure the smoothness and continuity of the blade 6's rotary cutting, enhancing the ease of operation and safety of the equipment.

[0026] Specifically, the knob spring device 4 includes a torsion spring 401, an operating handle 402, a fixing plate 403, and a transmission rod assembly 404. The fixing plate 403 is provided with a through hole 405, and the operating handle 402 is provided with a protrusion 406. One end of the transmission rod assembly 404 passes through the through hole 405 of the fixing plate 403 and is connected to the blade 6. The other end of the transmission rod assembly 404 is connected to the operating handle 402. The torsion spring 401 is sleeved on the outer ring of the transmission rod assembly 404 between the operating handle 402 and the fixing plate 403. One end of the torsion spring 401 is fixedly mounted on the fixing plate 403, and the other end is fixedly mounted on the operating handle 402. Rotating the operating handle 402 causes the torsion spring 401 to undergo torsional deformation, storing elastic potential energy. The protrusion 406 on the operating handle 402 is then locked by the switch 8. At this time, the torsion spring undergoes torsional deformation, storing elastic potential energy (torque). The operating switch 8 controls the release of the torsion spring, initiating the cutting action. When the operator presses the switch 8, the torsion spring releases the stored torque, driving the operating handle 402 to drive the transmission rod assembly 404, which in turn drives the blade 6 to quickly extend from the blade groove 3 for a 180° rotational cut. This embodiment employs a torsion spring 401 structure design, storing sufficient torque within a small space to provide adequate cutting power, making the blade 6 rotate more rapidly and efficiently. The connection between the transmission rod assembly 404 and the operating handle 402, along with the switch 8's limitation on the protrusion 406 of the operating handle 402, simplifies the operation process and improves the convenience and precision of the doctor's operation.

[0027] As a preferred embodiment, after the blade 6 completes a 180° rotational cut along the blade groove direction 7, the cut tissue is collected through the tissue groove 2. The arc-shaped contour of the blade 6 described in this application matches the opening contour of the tissue groove 2. After the blade 6 completes the rotational cut, its cutting surface faces the tissue groove 2 and completely covers the opening of the tissue groove 2, thereby sealing the tissue groove. The design of the blade 6 sealing the tissue groove 2 ensures that the cut tissue sample will not fall off or become contaminated due to the removal of the needle 1 or operation movement, improving the integrity and sterility of the sample, which is beneficial to subsequent pathological analysis. After sampling is completed and the puncture needle is removed from the tissue, the operating handle is rotated, and the blade is driven by the transmission rod assembly to rotate in the opposite direction and reset under the rebound torque of the torsion spring, hiding it in the blade groove 3. This avoids secondary damage to human tissue during needle removal or movement, and improves patient safety.

[0028] As a preferred option, blade 6 is selected as an arc-shaped cutting edge, which improves the cutting efficiency during rotary cutting, reduces cutting resistance, and achieves a smoother and more stable cutting process. At the same time, it reduces the compression and pulling of the target tissue, effectively reducing bleeding and pain during the sampling process and improving patient comfort. The arc-shaped structure helps to make the cutting surface flat, improves the quality and integrity of tissue samples, and enhances the accuracy of pathological examination results.

[0029] In this application, the needle 1 is selected as 18G specification, about 1.5cm in length. This specification of needle 1 has a moderate diameter, which takes into account the requirements of sampling efficiency and small incision, reduces damage to patient tissues by puncture, and improves safety. At the same time, it ensures the rigidity and strength of needle 1 during the puncture process, prevents safety hazards caused by deformation or breakage of needle 1, improves the reliability of puncture operation, meets the requirements of prostate biopsy for sample size and integrity, and helps to improve the sampling success rate and the accuracy of pathological analysis.

[0030] As a preferred embodiment, the transmission rod assembly 404 is mounted on the bearing 5, and the transmission rod assembly 404 rotates along the bearing 5; the bearing 5 provides support for the rotation of the transmission rod assembly 404, ensuring the stability of the transmission rod assembly driving the blade to perform rotary cutting.

[0031] As a preferred embodiment, the switch 8 in this application includes a locking lever 801, a locking block 802, a locking groove 803, a spring 804, and a limiting lever 805; The locking block 802 is disposed on the outer wall 9 of the piercing gun head. The locking block 802 is provided with a locking groove 803. The locking groove 803 is provided with a locking rod 801. One end of the locking rod 801 is fixedly disposed at the bottom end of the locking groove 803, and the other end is slidably disposed in the groove 806 of the limiting rod 805. One end of the limiting rod 805 is located in the locking groove 803, and the other end extends out of the locking groove 803. A spring 804 is provided between the bottom end of the limiting rod 805 and the bottom end of the locking groove 803. The spring 804 is sleeved on the locking rod 801. In its natural state, the limiting rod 805 extends out of the locking groove 803 to limit the protrusion 406 on the operating handle 402. The groove 806 and the locking rod 801 provide guidance for the limiting rod 805 to move towards the bottom end of the locking groove 803, ensuring the stability of the limiting rod 805 moving along the locking groove 803.

[0032] When it is necessary to drive the blade 6 to perform in-situ sample cutting, press the limiting rod 805. The limiting rod 805 will move along the locking groove 803. During the movement of the limiting rod 805 towards the bottom of the locking groove 803, the spring 804 between the bottom of the limiting rod 805 and the bottom of the locking groove 803 is compressed. When the limiting rod 805 is fully retracted into the locking groove 803, the protrusion 406 on the operating handle 402 is not limited. Under the action of the torsion spring releasing the stored torque, the operating handle 402 drives the transmission rod assembly 404, which in turn drives the blade 6 to quickly extend out of the blade groove 3 for 180° rotational cutting, completely sampling. After sampling is completed, the blade 6 remains covering the tissue groove 2, ensuring that the cut tissue sample will not fall off or be contaminated due to the needle 1 being pulled out or the operation being moved.

[0033] This application also provides a sampling method using a prostate biopsy nozzle with in-situ rotational cutting, the specific sampling process of which is as follows: S1. Insert the needle 1 of the puncture gun into the target lesion area; S2. By operating the switch 8 on the outer wall 9 of the piercing gun head, the limit rod 805 is pressed. The limit rod 805 moves along the locking groove 803 and compresses the spring 804. When the top of the limit rod 805 is flush with the surface of the locking block 802, the limit rod 805 is fully retracted into the locking groove 803. The limit rod 805 releases the limit on the protrusion 406 on the operating handle 402. The torsion spring 401 releases the stored torsion force, which drives the operating handle 402 and the transmission rod assembly 404, and then drives the blade 6 to rotate 180° along the semi-circular blade groove trajectory to cut the target tissue. S3. The cut tissue sample is collected into the tissue groove 2. The blade 6 faces the tissue groove 2 and completely covers the opening of the tissue groove 2 to seal the tissue groove and complete the sampling process. S4. After sampling is completed, the operating handle 402 is rotated in the opposite direction to drive the blade 6 back into the blade groove 3. The limit rod 805 extends out of the locking groove 803 under the elastic force of the spring 804, and re-locks the protrusion 406 on the operating handle 402.

[0034] This sampling method has the following advantages: clear steps and standardized procedures facilitate sampling operations according to established procedures; the release and reset of the blade can be controlled by a switch, simplifying the operation steps; the rotating cutting of the blade 6 and the collection of the tissue groove 2 achieve efficient, safe, and pollution-free sampling, optimizing the clinical user experience; the complete operation process reduces the risk of external contamination and sample loss, improving the reliability of pathological analysis and diagnostic accuracy.

[0035] Compared with the prior art, this application has the following advantages: (1) The design of the arc-shaped cutting blade and the rotating cutting along the blade groove 3 enables precise sampling, ensuring that the tissue sample cut surface is neat and effectively improving the accuracy and reliability of pathological examination; (2) Use 18G needles, which have good rigidity and fineness, effectively reducing tissue damage and patient pain during puncture and improving the patient's surgical experience; (3) After the blade 6 completes the cutting, it seals the tissue groove 2 to prevent the sample from being lost or contaminated during the removal of the needle 1, thereby improving the integrity and safety of the sample. (4) The knob spring device 4 provides a continuous and stable torque output, ensuring that the blade 6 rotates and cuts smoothly and powerfully, avoiding jamming, improving sampling efficiency and cutting effect, and realizing in-situ rotational cutting sampling of prostate tissue, effectively reducing tissue tearing and ensuring the flatness of the cutting surface. The cutting device can be started with a switch, reducing the number of steps required for medical staff, improving the efficiency of clinical operations, and reducing the probability of misoperation.

[0036] The above description, in conjunction with specific embodiments, provides a detailed explanation of the present invention, but it should not be construed as limiting the specific implementation of the invention to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A prostate biopsy nozzle for in-situ rotary cutting, characterized in that: include: The needle (1) is set at the front end of the puncture gun and is used to puncture the prostate tissue; The blade groove (3) is semi-circular and is arranged longitudinally along the needle tip (1); The blade (6) is rotatably mounted in the blade groove (3) and rotates 0-180° along the trajectory of the blade groove (3); Tissue groove (2), provided on the surface of the needle (1), is used to collect tissue samples after cutting; A knob spring device (4), connected to the blade (6), is used to provide rotational power to drive the blade (6) to rotate along the blade groove (3) to cut prostate tissue.

2. The in-situ rotary cutting prostate puncture gun tip according to claim 1, characterized in that: The knob spring device (4) includes a torsion spring (401), an operating handle (402), a fixing plate (403), and a transmission rod assembly (404). The fixing plate (403) has a through hole (405), and the operating handle (402) has a protrusion (406). One end of the transmission rod assembly (404) passes through the through hole (405) of the fixing plate (403) and is connected to the blade (6). The other end of the transmission rod assembly (404) is connected to the operating handle (402). The torsion spring (401) is sleeved on the outer ring of the transmission rod assembly (404) between the operating handle (402) and the fixing plate (403). One end of the torsion spring (401) is fixedly mounted on the fixing plate (403), and the other end is fixedly mounted on the operating handle (402). Rotating the operating handle (402) causes the torsion spring (401) to undergo torsional deformation. After storing elastic potential energy, the protrusion (406) on the operating handle (402) is locked by the switch (8).

3. The in-situ rotary cutting prostate biopsy nozzle according to claim 1, characterized in that: The arc-shaped profile of the blade (6) matches the opening profile of the tissue groove (2). After the blade (6) completes the rotational cutting, its cutting surface faces the tissue groove (2) and completely covers the opening of the tissue groove (2), thereby closing the tissue groove.

4. The in-situ rotary cutting prostate puncture gun tip according to claim 1, characterized in that: The blade (6) is an arc-shaped cutting edge.

5. The in-situ rotary cutting prostate biopsy nozzle according to claim 1, characterized in that: The needle (1) is of 18G specification.

6. The in-situ rotary cutting prostate biopsy nozzle according to claim 2, characterized in that: The transmission rod assembly (404) is mounted on the bearing (5), and the transmission rod assembly (404) rotates along the bearing (5).

7. The in-situ rotary cutting prostate puncture gun tip according to claim 2, characterized in that: The switch (8) includes a locking lever (801), a locking block (802), a locking groove (803), a spring (804), and a limit lever (805). The locking block (802) is disposed on the outer wall (9) of the piercing gun head. The locking block (802) is provided with a locking groove (803). The locking groove (803) is provided with a locking rod (801). One end of the locking rod (801) is fixedly disposed at the bottom end of the locking groove (803), and the other end is slidably disposed in the groove (806) of the limiting rod (805). One end of the limiting rod (805) is located in the locking groove (803), and the other end extends out of the locking groove (803). A spring (804) is provided between the bottom end of the limiting rod (805) and the bottom end of the locking groove (803). The spring (804) is sleeved on the locking rod (801). In its natural state, the limiting rod (805) extends out of the locking groove (803) to limit the protrusion (406) on the operating handle (402).

8. A sampling method using the in-situ rotary cutting prostate biopsy nozzle as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Insert the needle (1) of the puncture gun into the target lesion area; S2. By operating the switch (8) on the outer wall (9) of the piercing gun head, press the limiting rod (805). The limiting rod (805) moves along the locking groove (803) to compress the spring (804). When the top of the limiting rod (805) is flush with the surface of the locking block (802), the limiting rod (805) is completely retracted into the locking groove (803). The limiting rod (805) releases the limiting of the protrusion (406) on the operating handle (402). The torsion spring (401) releases the stored torsion force, driving the operating handle (402), the transmission rod assembly (404), and then the blade (6) to rotate 180° along the semi-circular blade groove trajectory to cut the target tissue. S3. The cut tissue sample is collected into the tissue groove (2). The blade (6) faces the tissue groove (2) and completely covers the opening of the tissue groove (2) to achieve the closure of the tissue groove and complete the sampling process. S4. After sampling is completed, the operating handle (402) is rotated in the opposite direction to drive the blade (6) to return to the blade groove (3). The limit rod (805) extends out of the locking groove (803) under the elastic force of the spring (804) and relocks the protrusion (406) on the operating handle (402).

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