Puncture needle for muscular tissue biopsy

Abstract

The invention relates to the field of medical technical equipment, in particular to a puncture needle for muscular tissue biopsy, and aims to solve the problem that an existing device cannot meet the requirements of transverse and longitudinal puncture paths at the same time, the puncture needle comprises a needle shell, and further comprises a longitudinal sampling mechanism and a transverse sampling mechanism; the longitudinal sampling mechanism is slidably arranged at one end of the needle shell and used for obtaining tissue samples in the needle entering direction. The transverse sampling mechanism is movably arranged in the radial direction of the needle shell, and one end of the transverse sampling mechanism penetrates through the needle shell and is used for obtaining tissue samples in the direction perpendicular to the needle entering direction. Longitudinal sampling and transverse sampling can be achieved at the same time in the one-time puncture process of a diseased region, multi-point sampling is needed in some diseased regions due to heterogeneity, complex conditions of the diseased regions can be reflected more comprehensively, meanwhile, the puncture frequency is reduced, and discomfort of a patient is reduced. The transverse sampling enables the detection of the sample to be more comprehensive and three-dimensional, and the accuracy and reliability of tissue biopsy are further improved.

Description

Technical Field

[0001] The present invention relates to the field of medical technology equipment, and in particular to a puncture needle for muscle tissue biopsy. Background Art

[0002] Muscle biopsy is an important diagnostic tool in clinical medicine, widely used to detect and diagnose muscle diseases, tumors, and other pathological tissues. By obtaining muscle tissue samples from patients for pathological analysis, doctors can accurately determine the nature of the lesion, formulate treatment plans, and assess prognosis.

[0003] Currently, the most commonly used muscle tissue biopsy method in clinical practice primarily utilizes a traditional puncture needle for single-directional sampling. This type of needle typically only obtains tissue samples along the direction of insertion, resulting in a relatively limited sampling method. However, with the increasing demand for medical diagnostic precision, the limitations of traditional single-directional sampling are becoming increasingly prominent.

[0004] Many diseased tissues have heterogeneous characteristics. For example, patients with Duchenne muscular dystrophy require multi-point sampling to assess the degree of muscle fiber atrophy, and the pathological manifestations in different regions may vary significantly. Existing puncture needles cannot simultaneously meet the requirements of both transverse (perpendicular to the muscle fibers) and longitudinal (along the muscle fibers) puncture paths, resulting in insufficient representativeness of the sampling. Sampling in a single direction often cannot fully reflect the complex situation of the lesion, which may lead to misdiagnosis or missed diagnosis, affecting the accuracy and reliability of the diagnosis. It can be seen that the sampling efficiency of traditional puncture needles is relatively low, the amount of tissue samples obtained in a single puncture is limited, and the spatial distribution information of the samples is not comprehensive, which makes it difficult to meet the higher requirements of modern precision medicine for the quality and quantity of tissue biopsy samples.

[0005] Therefore, there is an urgent need for a new type of puncture needle that can simultaneously achieve longitudinal and transverse sampling in a single puncture process, so as to improve the accuracy of tissue biopsy, reduce the number of punctures, reduce patient discomfort, and obtain more representative tissue samples to meet the actual needs of clinical diagnosis. Summary of the Invention

[0006] In order to solve the above problems, the present invention aims to provide a puncture needle for muscle tissue biopsy, which can achieve longitudinal sampling and transverse sampling simultaneously in one puncture.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A puncture needle for muscle tissue biopsy comprises a needle shell, a longitudinal sampling mechanism and a transverse sampling mechanism; the longitudinal sampling mechanism is slidably arranged at one end of the needle shell and is used to obtain tissue samples along the needle insertion direction; the transverse sampling mechanism is movably arranged along the radial direction of the needle shell, and one end passes through the needle shell, and is used to obtain tissue samples in a direction perpendicular to the needle insertion direction.

[0008] This design allows for simultaneous longitudinal and transverse sampling of the lesion during a single puncture. The heterogeneity of some lesions requires multi-point sampling, which provides a more comprehensive picture of the lesion's complexity while reducing the number of punctures and patient discomfort. Transverse sampling also provides a second direction for sampling, making the sample analysis more comprehensive and multidimensional. Furthermore, either longitudinal or transverse sampling can be used independently, providing a degree of flexibility.

[0009] Furthermore, the transverse sampling mechanism includes a transverse sampling component, a drive component and a control component; the transverse sampling component slides radially through the needle shell and is connected to the drive component; the drive component is movably arranged in the needle shell, used to drive the transverse sampling component to extend and rotate for sampling; the control component is movably arranged in the needle shell, used to reset the drive component and limit the transverse sampling component.

[0010] Through this design, the sampling method of the transverse sampling mechanism is further limited. The transverse sampling mechanism rotates and extends from the needle shell to perform sampling; the driving component provides power for the rotation and extension of the transverse sampling mechanism; the control component limits the transverse sampling component before sampling to prevent it from extending out of the needle shell, and resets the driving component after sampling to return the transverse sampling component to the needle shell; the overall fully mechanical transmission is completed, with wide applicability and high environmental protection.

[0011] Furthermore, the transverse sampling assembly includes a threaded sleeve and a transverse sampling needle; one end of the threaded sleeve is connected to the inner wall of the needle shell through an active telescopic rod; the transverse sampling needle is movably sleeved in the threaded sleeve, and the end is threadedly connected to the threaded sleeve, and a first sampling knife is provided on the side wall of the transverse sampling needle.

[0012] Through this design, a specific structure of a transverse sampling component is provided. The transverse sampling needle can be rotated and displaced in the threaded sleeve, and the first sampling knife on its side wall is rotated to cut and sample. After sampling, the sample tissue is in the transverse sampling needle; after the transverse sampling component is reset, the threaded sleeve is sleeved outside the transverse sampling needle to prevent the tissue sample from falling out; wherein, the active telescopic rod is used to control the extension and retraction of the threaded sleeve.

[0013] Furthermore, the drive assembly includes a ratchet and a first spring; the ratchet is rotatably connected to the needle housing, and a first spring is provided between one side of the ratchet and the needle housing; the telescopic transmission rod connects the rear end of the transverse sampling needle and the ratchet, and movably passes through the threaded sleeve.

[0014] Through this design, a specific structure of a driving component is provided, in which the ratchet, threaded sleeve and transverse sampling needle are coaxially arranged, the telescopic transmission rod is passively and freely retracted, and the telescopic transmission rod is arranged on the axis of the ratchet, threaded sleeve and transverse sampling needle; when the ratchet rotates, it can drive the transverse sampling needle to rotate coaxially and synchronously. When the needle is inserted into the needle housing, the control assembly releases the limit on the transverse sampling mechanism, and the active telescopic rod pushes out the threaded sleeve and the transverse sampling needle in the threaded sleeve. The first spring releases kinetic energy to drive the ratchet to rotate the transverse sampling needle, and the transverse sampling needle rotates and extends through the thread in the threaded sleeve, and the first sampling knife takes samples, thereby realizing the extension and rotation sampling of the transverse sampling assembly. When resetting, the active telescopic rod is retracted, and the control assembly drives the ratchet to rotate, thereby driving the transverse sampling needle to be retracted into the threaded sleeve through the thread, and the first spring rotates and accumulates force. Finally, the transverse sampling needle and the threaded sleeve are both restored to the needle housing, and the transverse sampling needle, except for the tip, is sleeved in the threaded sleeve, and the first spring also rotates and accumulates force.

[0015] Furthermore, the control component includes a rotating shaft, a fixed rod and a limiter; the rotating shaft is rotatably connected to the needle housing and is connected to the ratchet belt transmission for resetting the ratchet rotation; the fixed rod is connected to the end of the threaded sleeve, and the end of the fixed rod is provided with a limit block for limiting the ratchet; the limiter is connected to the inner wall of the needle housing for limiting the horizontal sampling component.

[0016] With this design, the ratchet is reset by manually rotating the rotating shaft through belt transmission, and when it is reset to the initial state, the limit block on the fixed rod clamps the ratchet, and together with the limiter, completes double limiting of the horizontal sampling component, thereby improving the stability of the limit and avoiding unnecessary damage caused by accidental extension of the horizontal sampling component when horizontal sampling is not performed.

[0017] Furthermore, the limiter includes a mounting platform, a limit plate and a control rod; the mounting platform is arranged on the inner wall of the needle shell; the limit plate is elastically connected to the mounting platform, and is used to block the through hole of the transverse sampling assembly through the needle shell; the control rod is set to slide axially along the needle shell and is connected to the limit plate, and is used to release the blockage of the limit plate.

[0018] Through this design, the limit plate blocks the through hole corresponding to the horizontal sampling needle to achieve the limitation of the horizontal sampling component; the limit plate is elastically connected to the mounting platform, and when the control rod is pressed down, the limit plate is also pressed down to release the limit; the elastic connection between the limit plate and the mounting platform is used to reset the limit plate and restore the limit.

[0019] Furthermore, the longitudinal sampling mechanism includes a longitudinal sampling needle, a second sampling knife and an auxiliary component; the longitudinal sampling needle is slidably arranged at the end of the needle shell and is elastically connected to the needle shell; the second sampling knife is rotatably connected to the side wall of the longitudinal sampling needle; the auxiliary component is arranged between the needle shell and the longitudinal sampling needle, and is used to automatically control the opening and closing of the second sampling knife.

[0020] With this design, when the longitudinal sampling mechanism is inserted, the auxiliary assembly automatically opens and maintains the second sampling blade in place, rotating the entire puncture needle and causing the longitudinal sampling needle to rotate with it. The second sampling blade then automatically closes to prevent the sample from being lost in the body. It's important to note that during longitudinal sampling, the transverse sampling mechanism should be in its initial state (not extending from the needle housing).

[0021] Furthermore, the auxiliary component includes a limiting rod, a connecting rod and an adjusting rod; the limiting rod is radially arranged in the needle shell; the connecting rod is axially arranged in the longitudinal sampling needle and connected to the limiting rod; one end of the adjusting rod is rotatably connected to the second sampling knife, and the other end is rotatably connected to the connecting rod.

[0022] With this design, when the puncture needle is inserted, due to the sliding connection between the longitudinal sampling knife and the needle shell, under the pressure of muscle tissue or skin, the longitudinal sampling knife will slide to against the limit rod before being inserted into the puncture site. At this time, the angle between the connecting rod and the adjusting rod increases (not exceeding 90 degrees), driving the second sampling knife to be stretched out, and sampling can be carried out; after the sampling is completed, the entire puncture needle is slightly pulled out. Due to the elastic connection between the longitudinal sampling needle and the needle shell, the longitudinal sampling needle slides to the lower end of the needle shell and resets, and the angle between the connecting rod and the adjusting rod decreases, driving the second sampling knife to close.

[0023] Preferably, a positioning sleeve is provided on the needle housing, and the positioning sleeve is movably arranged outside the needle housing.

[0024] In some embodiments, an adhesive layer is provided at the bottom of the positioning sleeve, which stably adheres the positioning sleeve to the puncture point. The needle shell is located in the positioning sleeve and can slide up and down and rotate, making it easier for the puncture needle to be inserted more stably from the puncture point.

[0025] Preferably, the positioning sleeve is further provided with a fixing component for limiting the needle housing.

[0026] With this design, when longitudinal sampling is completed and transverse sampling is required, the fixing component can be activated to limit the needle shell and the positioning sleeve. Since the positioning sleeve is stably adhered to the skin, the position of the entire needle shell can be made more stable, thereby improving the safety of transverse puncture sampling.

[0027] The present invention has the following beneficial effects: 1. The present invention integrates a longitudinal sampling mechanism and a transverse sampling mechanism on the needle housing. The longitudinal sampling mechanism obtains tissue samples along the needle insertion direction, and the transverse sampling mechanism obtains tissue samples perpendicular to the needle insertion direction. This allows the puncture needle to simultaneously perform longitudinal and transverse sampling during a single puncture of the lesion site, thereby improving sampling accuracy and sample representativeness, enabling a more comprehensive reflection of the complexities of the lesion, while reducing the number of punctures and alleviating patient discomfort.

[0028] 2. Through the threaded connection structure between the threaded sleeve of the transverse sampling assembly and the transverse sampling needle, the transverse sampling needle can achieve smooth rotation and extension movement, and cooperate with the first sampling knife set on the side wall to rotate and cut for sampling. After the sampling is completed, the threaded sleeve closes the first sampling knife edge by sheathing the transverse sampling needle, effectively preventing the sample from falling out and ensuring high sampling reliability.

[0029] 3. The drive assembly consists of a ratchet, a first spring and a telescopic transmission rod. The rotation, storage and release of the first spring and the coaxial transmission of the telescopic transmission rod realize the precise extension and retraction and return of the transverse sampling needle. In the initial state, the first spring rotates to store force. When sampling, the spring releases to push out the transverse sampling needle. When resetting, the ratchet rotates to drive the transverse sampling needle to retract. The entire process is precise and controllable.

[0030] 4. The belt drive connection between the rotating shaft and the ratchet in the control component, as well as the double limit design of the limit block and the limiter at the end of the fixed rod, ensure that the horizontal sampling component is stably retracted inside the needle housing when not in operation, avoiding unnecessary injuries caused by accidental extension and improving the safety of operation.

[0031] 5. The elastic connection between the longitudinal sampling needle and the needle housing, combined with the connecting rod structure design of the auxiliary component, realizes the automatic opening and closing control of the second sampling knife. The sampling knife automatically opens under the action of pressure during puncture and automatically closes after sampling is completed, preventing the sample from falling into the body, thus ensuring the efficiency and safety of the longitudinal sampling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 Schematic diagram of the structure of the puncture needle for muscle tissue biopsy of the present invention; Figure 2 is a cross-sectional view of the puncture needle for muscle tissue biopsy of the present invention in a transverse sampling state; Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle; Figure 4is a cross-sectional view of the longitudinal sampling state of the puncture needle for muscle tissue biopsy of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of part B in the middle; Figure 6 It is a structural schematic diagram of the transverse sampling mechanism of the present invention; Figure 7 It is a structural schematic diagram of the horizontal sampling mechanism of the present invention in an extended state; Figure 8 for Figure 7 Enlarged schematic diagram of the middle C part; Figure 9 It is a structural schematic diagram of the transverse sampling mechanism of the present invention in a retracted state; Figure 10 for Figure 9 Enlarged schematic diagram of the middle D part; Figure 11 Schematic diagram of the structure of the limiter of the present invention; Figure 12 It is a structural schematic diagram of the longitudinal sampling mechanism of the present invention; Figure 13 A schematic structural diagram of the longitudinal sampling mechanism of the present invention from another perspective; Figure 14 It is a structural schematic diagram of the auxiliary component of the present invention; Figure 15 It is a structural schematic diagram of the positioning sleeve of the present invention; Figure 16 It is a structural schematic diagram of the fixing assembly of the present invention; Among them: 1. Needle housing; 11. Positioning sleeve; 12. Fixing assembly; 121. Fixed arc plate; 122. Drive shaft; 123. Pull ring; 21. Longitudinal sampling needle; 22. Second sampling knife; 23. Auxiliary assembly; 231. Limit rod; 232. Connecting rod; 233. Adjustment rod; 24. Third spring; 3. Horizontal sampling mechanism; 31. Horizontal sampling assembly; 311. Threaded sleeve; 3111. Active telescopic rod ; 312, horizontal sampling needle; 3121, first sampling knife; 32, driving assembly; 321, ratchet; 3211, first spring; 322, telescopic transmission rod; 33, control assembly; 331, rotating shaft; 332, fixing rod; 3321, limit block; 333, limiter; 3331, mounting table; 3332, limit plate; 3333, control rod; 3334, fixing cap; 3335, second spring. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "front end", "back end", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Example 1

[0036] This embodiment provides a puncture needle for muscle tissue biopsy, such as Figures 1 to 16 The device shown includes a needle shell 1, a longitudinal sampling mechanism and a transverse sampling mechanism 3; the longitudinal sampling mechanism is slidably arranged at one end of the needle shell 1, and is used to obtain tissue samples along the needle insertion direction; the transverse sampling mechanism 3 is radially movable along the needle shell 1, and one end passes through the needle shell 1, and is used to obtain tissue samples in a direction perpendicular to the needle insertion direction. The integrated design of the longitudinal sampling mechanism and the transverse sampling mechanism 3 enables the puncture needle to improve the accuracy of sampling and the representativeness of the sample. Longitudinal sampling and transverse sampling can be achieved simultaneously during a single puncture process at the lesion site. Due to the heterogeneity of some lesions, multi-point sampling is required, which can more comprehensively reflect the complexity of the lesion, while reducing the number of punctures and reducing the patient's discomfort. Transverse sampling makes the detection of samples more comprehensive and three-dimensional, further improving the accuracy and reliability of tissue biopsy. In addition, longitudinal sampling or transverse sampling can be used separately according to specific needs to meet the needs of different lesions and tissue detection.

[0037] Furthermore, the transverse sampling mechanism 3 includes a transverse sampling assembly 31, a drive assembly 32, and a control assembly 33; the transverse sampling assembly 31 slides radially through the needle housing 1 and is connected to the drive assembly 32; the drive assembly 32 is movably disposed within the needle housing 1 and is used to drive the transverse sampling assembly 31 to extend, retract, and rotate for sampling; the control assembly 33 is movably disposed within the needle housing 1 and is used to reset the drive assembly 32 and limit the transverse sampling assembly 31. The transverse sampling assembly 31 rotates and extends from the needle housing 1 for sampling. The drive assembly 32 provides the transverse sampling assembly 31 with power for extension and rotation; the control assembly 33 ensures that the transverse sampling assembly 31 is in a safe initial position before sampling by limiting and resetting the drive assembly 32, preventing it from extending outside the needle housing 1, and controls the transverse sampling assembly 31 to reset to its initial state after sampling. The overall mechanism adopts a fully mechanical transmission method, reducing the use of electrical components, thereby having a wide range of practical applications and high environmental protection and reliability.

[0038] Furthermore, the transverse sampling assembly 31 includes a threaded sleeve 311 and a transverse sampling needle 312. One end of the threaded sleeve 311 is connected to the inner wall of the needle housing 1 via an active telescopic rod 3111. The transverse sampling needle 312 is movably sleeved within the threaded sleeve 311, with its end threadedly connected to the threaded sleeve 311. A first sampling cutter 3121 is provided on the sidewall of the transverse sampling needle 312. The active telescopic rod 3111 controls the extension and retraction of the threaded sleeve. This allows the transverse sampling needle 312 to smoothly rotate and retract through its threaded connection with the threaded sleeve 311. During this process, the first sampling cutter 3121 on the sidewall of the transverse sampling needle 312 effectively rotates and cuts the sample. After sampling is completed, the control assembly 33 is reset, and the transverse sampling needle 312 is screwed back into the threaded sleeve 311, preventing the sample from falling out.

[0039] Furthermore, the drive assembly 32 includes a ratchet 321 and a first spring 322. The ratchet 321 is rotatably connected to the needle housing 1, and a first spring 3211 is disposed between one side of the ratchet 321 and the needle housing 1. A telescopic drive rod 322 connects the rear end of the transverse sampling needle 312 and the ratchet 321. The ratchet 321, the threaded sleeve 311, and the transverse sampling needle 312 are coaxially arranged. The telescopic drive rod 322 is passively and freely retractable and is disposed along the axis of the ratchet 321, the threaded sleeve 311, and the transverse sampling needle 312. Rotation of the ratchet 321 drives the transverse sampling needle 312 to rotate coaxially and synchronously. When the first spring 3211 is in a rotational force storage state, the transverse sampling needle 312 and the threaded sleeve 311 are inside the needle housing 1; when puncturing and sampling, the control component 33 cancels the limit of the transverse sampling mechanism 3, and the active telescopic rod 3111 pushes out the threaded sleeve 311 and the transverse sampling needle 312 inside the threaded sleeve 311, and the first spring 3211 releases kinetic energy to make the ratchet 321 drive the transverse sampling needle 312 to rotate, and the transverse sampling needle 312 rotates and extends inside the threaded sleeve 311 through the thread, and the first sampling knife 3121 takes samples, realizing The transverse sampling assembly 31 extends and rotates to take samples; when resetting, the active telescopic rod 3111 is retracted, and the control assembly 33 drives the ratchet 321 to rotate, thereby driving the transverse sampling needle 312 to retract along the threaded sleeve 311, and the first spring 3211 rotates and accumulates force, and the sample in the transverse sampling needle 312 is prevented from accidentally falling out under the closure of the threaded sleeve 311; finally, the transverse sampling needle 312 and the threaded sleeve 311 are both restored to the needle housing 1, and the transverse sampling needle 312 is completely sleeved in the threaded sleeve 311, and the first spring 3211 also rotates and accumulates force.

[0040] Furthermore, the control assembly 33 includes a rotating shaft 331, a fixed rod 332, and a stopper 333. The rotating shaft 331 is rotatably connected to the needle housing 1 and is belt-drivenly connected to the ratchet 321 for resetting the ratchet 321. The fixed rod 332 is connected to the end of the threaded sleeve 311 and is provided with a stopper 3321 for limiting the position of the ratchet 321. The stopper 333 is connected to the inner wall of the needle housing 1 and is used to limit the position of the transverse sampling assembly 31. Manual rotation of the rotating shaft 331, via the belt drive, resets the ratchet 321. When the ratchet 321 is reset to its initial position, the stopper 3321 on the fixed rod 332 engages the ratchet 321, and together with the stopper 333, double-limits the transverse sampling assembly 31, improving the stability of the position and preventing the transverse sampling assembly 31 from accidentally extending when transverse sampling is not in progress, which could cause unnecessary injury. This ensures operational safety and prevents unnecessary injury to the patient during the puncture process.

[0041] Furthermore, the limiter 333 includes a mounting platform 3331, a limiting plate 3332, and a control rod 3333. The mounting platform 3331 is disposed on the inner wall of the needle housing 1. The limiting plate 3332 is connected to the mounting platform 3331 via a second spring 3335, and is used to block the through hole of the transverse sampling assembly 31 that passes through the needle housing 1. The control rod 3333 is axially slidable along the needle housing 1 and is connected to the limiting plate 3332, and is used to release the blocking of the limiting plate 3332. The limiting plate 3332 blocks the through hole corresponding to the transverse sampling needle 312, thereby limiting the transverse sampling assembly 31. The second spring disposed between the limiting plate 3332 and the mounting platform 3331 is pressed downward by the control rod 3333, and the limiting plate 3332 is also pressed downward, thereby releasing the limit. The elastic connection between the limiting plate 3332 and the mounting platform 3331 is used to reset the limiting plate 3332, thereby restoring the limit. Specifically, a fixing cap 3334 is provided on the control rod 3333. After the control rod 3333 is pressed down, the fixing cap 3334 will be stably mounted on the upper end of the needle housing 1 without the need for manual continuous force to stabilize it; when the downward pressure needs to be released, the fixing cap 3334 can be removed from the needle housing 1.

[0042] Furthermore, the longitudinal sampling mechanism includes a longitudinal sampling needle 21, a second sampling knife 22, and an auxiliary component 23; the longitudinal sampling needle 21 is slidably mounted at the end of the needle housing 1 and is connected to the needle housing 1 via a third spring 24; the second sampling knife 22 is rotatably connected to the side wall of the longitudinal sampling needle 21; and the auxiliary component 23 is disposed between the needle housing 1 and the longitudinal sampling needle 21 and is used to automatically control the opening and closing of the second sampling knife 22. When the longitudinal sampling mechanism is inserted, the auxiliary component 23 automatically controls the second sampling knife 22 to open and maintain its position, rotating the entire puncture needle so that the longitudinal sampling needle 21 rotates accordingly, and the second sampling knife 22 takes a sample. The auxiliary component 23 then automatically controls the second sampling knife 22 to close, preventing the sample from being left inside the body. It should be noted that during longitudinal sampling, the transverse sampling mechanism 3 should be in its initial state (not extending outside the needle housing 1) to ensure safety.

[0043] Furthermore, the auxiliary assembly 23 includes a limiting rod 231, a connecting rod 232, and an adjusting rod 233. The limiting rod 231 is radially disposed within the needle housing 1. The connecting rod 232 is axially disposed within the longitudinal sampling needle 21 and connected to the limiting rod 231. One end of the adjusting rod 233 is rotatably connected to the second sampling knife 22, and the other end is rotatably connected to the connecting rod 232. This design makes the opening and closing of the longitudinal sampling knife smoother. When the puncture needle is inserted, due to the sliding connection between the longitudinal sampling knife and the needle housing 1, under the pressure of muscle tissue or skin, the longitudinal sampling knife will slide until it contacts the limit rod 231 before being inserted into the puncture site. At this time, the angle between the connecting rod 232 and the adjusting rod 233 increases (no more than 90 degrees), driving the second sampling knife 22 to be stretched, allowing sampling. After sampling is completed, the entire puncture needle is slightly pulled out. Due to the elastic connection between the longitudinal sampling needle 21 and the needle housing 1, the longitudinal sampling needle 21 slides back to the lower end of the needle housing 1, and the angle between the connecting rod 232 and the adjusting rod 233 decreases, driving the second sampling knife 22 to close. When the puncture needle is inserted, the longitudinal sampling knife will automatically open under the action of pressure to ensure smooth sampling of the sample. After sampling is completed, as the longitudinal sampling needle 21 slides back to its original position, the longitudinal sampling knife also closes, ensuring the efficiency and safety of the operation. Example 2

[0044] Based on Example 1, as a preferred embodiment, a positioning sleeve 11 is provided on the needle housing 1, which is movably mounted on the outside of the needle housing 1. In this embodiment, an adhesive layer is provided at the bottom of the positioning sleeve 11, which securely adheres the positioning sleeve 11 to the puncture site. The needle housing 1 is positioned within the positioning sleeve 11 and can slide up and down and rotate, facilitating more stable insertion of the puncture needle. This design ensures greater stability of the puncture needle during use, preventing operational failures due to inaccurate positioning. Furthermore, the mobility of the positioning sleeve 11 allows for precise insertion and positioning of the puncture needle as needed.

[0045] Furthermore, the positioning sleeve 11 is equipped with a fixing assembly 12 for retaining the needle housing 1 in position. After longitudinal sampling is complete, if transverse sampling is required, fixing assembly 12 can be activated to retain the needle housing 1 and the positioning sleeve 11 in position. Because the positioning sleeve 11 is firmly attached to the skin, the entire needle housing 1 is more stable, improving the safety and accuracy of transverse puncture sampling.

[0046] In this embodiment, the fixing assembly 12 optionally includes a fixed arc plate 121 slidably mounted on the inner wall of the positioning sleeve 11, a transmission shaft 122, and a pull ring 123; the two ends of the transmission shaft 122 are respectively connected to the fixed arc plate 121 and the pull ring 123, and the middle portion of the transmission shaft 122 is rotatably connected to the positioning sleeve 11. When it is necessary to fix the needle housing 1, the pull ring 123 is pulled. Since the middle portion of the transmission shaft 122 is rotatably connected to the positioning sleeve 11, the fixed arc plate 121 is squeezed inward, limiting the position of the needle housing 1. The pull ring 123 is connected to the transmission shaft 122 by a connecting rope. When a stable limiting state is required, the pulled connecting rope can be tied together, or other existing methods can be used.

[0047] Summary of working principle: The puncture needle for muscle tissue biopsy provided by the present invention has two main working principles: one is the principle of the transverse sampling mechanism 3, and the other is the principle of the longitudinal sampling mechanism, which are specifically as follows.

[0048] Horizontal sampling assembly 31: In the initial state, the first spring 3211 is initially in a rotational storage state, and the horizontal sampling needle 312 and the threaded sleeve 311 are inside the needle housing 1; when horizontal sampling is required, the control rod 3333 is pressed down, and the control rod 3333 presses down the limit plate 3332, canceling the limit of the horizontal sampling mechanism 3, and the active telescopic rod 3111 pushes out the threaded sleeve 311 and the horizontal sampling needle 312 in the threaded sleeve 311, and the first spring 3211 releases kinetic energy to make the ratchet 321 drive the horizontal sampling needle 312 to rotate, and the horizontal sampling needle 312 rotates and extends in the threaded sleeve 311 through the thread, and the first sampling knife 3121 takes samples, thereby realizing the extension and rotation sampling of the horizontal sampling assembly 31; when resetting, the active telescopic rod 3111 is retracted. When the rod 3111 is retracted, the rotating shaft 331 is manually rotated, and the ratchet 321 is driven by the belt drive to rotate, thereby driving the horizontal sampling needle 312 to be retracted along the threaded sleeve 311. The first spring 3211 rotates and accumulates force, and the horizontal sampling needle 312 is sleeved outside the threaded sleeve 311 to prevent the sample from falling out accidentally; finally, the horizontal sampling needle 312 and the threaded sleeve 311 are both restored to the needle housing 1, and the horizontal sampling needle 312 is completely sleeved in the threaded sleeve 311, the first spring 322 is also compressed and accumulates force, and the limit block 3321 on the fixed rod 332 is stuck in the ratchet 321; at this time, the fixing cap 3334 is removed, and the continuous downward pressure of the control rod 3333 is lost, the limit plate 3332 pops out, and the through hole corresponding to the horizontal sampling needle 312 is re-blocked.

[0049] Longitudinal sampling assembly: When the puncture needle is inserted into the target tissue, due to the sliding connection between the longitudinal sampling knife and the needle shell 1, under the pressure of the muscle tissue or skin, the longitudinal sampling knife will slide to the limit rod 231 before inserting into the puncture site. At this time, the angle between the connecting rod 232 and the adjusting rod 233 increases (not exceeding 90 degrees), driving the second sampling knife 22 to be stretched open, and the entire puncture needle is rotated to cause the longitudinal sampling needle 21 to rotate accordingly, and the second sampling knife 22 takes samples; after the sampling is completed, the entire puncture needle is slightly pulled out. Due to the elastic connection between the longitudinal sampling needle 21 and the needle shell 1, the longitudinal sampling needle 21 slides and resets toward the lower end of the needle shell 1, and the angle between the connecting rod 232 and the adjusting rod 233 is reduced, driving the second sampling knife 22 to close, thereby avoiding the loss of the collected sample when performing other operations or pulling out the puncture needle.

[0050] Specific application cases: In the medical field, muscle tissue biopsy is often used to detect the characteristics of lesions, tumors, or other abnormal tissues. In traditional biopsy methods, a single-directional puncture needle is usually used for sampling. However, this method has certain limitations. Especially in the case of heterogeneous lesions or large lesion areas, single-directional sampling may not fully reflect the complexity of the tissue. In addition, multiple punctures with traditional puncture needles may cause pain and discomfort to the patient. In this case, the puncture needle for muscle tissue biopsy of the present invention can be used. The application method steps are as follows: 1. Stick the puncture needle positioning sleeve 11 on the skin surface to ensure that it is stably combined with the puncture point.

[0051] 2. Insert the puncture needle into the patient's muscle tissue, ensuring that the positioning sleeve 11 provides stable support to prevent the needle housing 1 from shifting.

[0052] 3. During longitudinal sampling, the puncture needle rotates, and the longitudinal sampling needle 21 rotates accordingly to sample tissue. At this time, the transverse sampling assembly 31 is not extended to avoid interfering with the longitudinal sampling process or causing unnecessary injury. After sampling is complete, the puncture needle is slightly withdrawn, and the longitudinal sampling needle 21 is reset and the second sampling knife 22 is closed.

[0053] 3. To perform transverse sampling, push down the control rod 3333, install the fixing cap 3334 on the top of the needle housing 1, and control the active telescopic rod 3111 to extend the threaded sleeve 311 of the transverse sampling assembly 31. Finally, the transverse sampling assembly automatically rotates to perform sampling. After sampling is completed, control the active telescopic rod 3111 to retract the threaded sleeve 311 of the transverse sampling assembly 31. Rotate the rotating shaft 331 until the stop block 3321 engages the ratchet 321, and the transverse sampling knife 31 is retracted. The entire transverse sampling assembly 31 is then returned to the needle housing 1.

[0054] 4. After the puncture needle completes sampling, pull out the puncture needle, remove the positioning sleeve 11, treat the wound and collect tissue samples.

[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A puncture needle for muscle tissue biopsy, comprising a needle housing (1), characterized in that: Also includes: A longitudinal sampling mechanism, slidably arranged at the front end of the needle housing (1), for obtaining tissue samples along the needle insertion direction; The transverse sampling mechanism (3) is movably arranged along the radial direction of the needle shell (1), and the front end thereof passes through the needle shell (1), and is used for obtaining tissue samples in a direction perpendicular to the needle insertion direction.

2. The puncture needle for muscle tissue biopsy according to claim 1, characterized in that: The transverse sampling mechanism (3) comprises: A transverse sampling assembly (31) slides radially through the needle housing (1); A driving assembly (32) is movably disposed in the needle housing (1) and connected to the transverse sampling assembly (31), and is used to drive the transverse sampling assembly (31) to extend and rotate to thereby sample; A control component (33) is movably disposed in the needle housing (1) and is used to reset the drive component (32) and limit the transverse sampling component (31).

3. The puncture needle for muscle tissue biopsy according to claim 2, characterized in that: The transverse sampling assembly (31) comprises: A threaded sleeve (311), one end of which is connected to the inner wall of the needle housing (1) via an active telescopic rod (3111); A transverse sampling needle (312) is movably sleeved in the threaded sleeve (311), and an end portion is threadedly connected to the threaded sleeve (311). A first sampling knife (3121) is provided on the side wall of the transverse sampling needle (312).

4. The puncture needle for muscle tissue biopsy according to claim 3, characterized in that: The drive assembly (32) comprises: A ratchet (321) is rotatably connected to the needle housing (1), and a first spring (3211) is provided between one side of the ratchet (321) and the needle housing (1); A telescopic transmission rod (322) connects the transverse sampling needle (312) and the ratchet (321), and movably passes through the threaded sleeve (311).

5. The puncture needle for muscle tissue biopsy according to claim 4, characterized in that: The control component (33) includes: A rotating shaft (331) is rotatably connected to the needle housing (1) and is drivingly connected to the ratchet (321) for rotating and resetting the ratchet (321); A fixing rod (332) is connected to the end of the threaded sleeve (311), and the end of the fixing rod (332) is provided with a limiting block (3321) for limiting the position of the ratchet; A limiter (333) is connected to the inner wall of the needle housing (1) and is used to limit the position of the transverse sampling assembly (31).

6. The puncture needle for muscle tissue biopsy according to claim 5, characterized in that: The stopper (333) comprises: A mounting platform (3331) is provided on the inner wall of the needle housing (1); A limiting plate (3332) is elastically connected to the mounting platform (3331) and is used to block the through hole of the transverse sampling assembly (31) passing through the needle housing (1); The control rod (3333) is axially slidably arranged along the needle housing (1) and is used to release the blocking of the limiting plate (3332).

7. The puncture needle for muscle tissue biopsy according to any one of claims 1 to 6, characterized in that: The longitudinal sampling mechanism comprises: A longitudinal sampling needle (21) is slidably disposed at the end of the needle housing (1) and elastically connected to the needle housing (1); A second sampling knife (22) is rotatably connected to the side wall of the longitudinal sampling needle (21); An auxiliary component (23) is provided between the needle housing (1) and the longitudinal sampling needle (21) and is used for automatically controlling the opening and closing of the second sampling knife (22).

8. The puncture needle for muscle tissue biopsy according to claim 7, characterized in that: The auxiliary component (23) includes: A limiting rod (231) is radially arranged inside the needle housing (1); A connecting rod (232) is axially disposed inside the longitudinal sampling needle (21) and connected to the limiting rod (231); An adjusting rod (233) has one end rotatably connected to the second sampling knife (22) and the other end rotatably connected to the connecting rod (232).

9. The puncture needle for muscle tissue biopsy according to any one of claims 1 to 6, characterized in that: A positioning sleeve (11) is provided on the needle housing (1), and the positioning sleeve (11) is movably sleeved outside the needle housing (1).

10. The puncture needle for muscle tissue biopsy according to claim 9, characterized in that: The positioning sleeve (11) is also provided with a fixing component (12) for limiting the position of the needle housing (1).

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