An ultrasound-guided needle biopsy device

Abstract

The present application relates to the technical field of needle sampling device, and particularly relates to an ultrasound-guided puncture needle sampling device, which comprises a needle tube, a sliding cavity is formed in the needle tube, a sampling cavity is formed in the outer wall of the distal end of the needle tube and communicates with the sliding cavity, and the sampling cavity is used for allowing the tissue to be sampled to enter after puncture positioning; a sampling assembly comprises a cutting head, a piston plate, an inner sliding rod and an outer sliding sleeve, the cutting head is sealingly and slidably arranged in the sliding cavity and can move along the axial direction of the needle tube and rotate around the axis of the needle tube. Through cooperation of the needle tube, the sampling cavity, the cutting head, the piston plate, the inner sliding rod, the outer sliding sleeve and the driving assembly, after one-time puncture positioning is completed under the ultrasound guidance, the tissue to be sampled can first enter the sampling cavity, then the cutting head moves forward and rotates to cut in the sliding cavity, and the cut tissue sample can be sucked into the cutting head through the negative pressure formed by the backward movement of the piston plate, so that the number of repeated puncture sampling is reduced.

Description

Technical Field

[0001] This invention relates to the field of needle sampling device technology, specifically to an ultrasound-guided needle sampling device. Background Technology

[0002] Ultrasound-guided needle sampling is an important means of obtaining lesion tissue samples in clinical practice and is widely used in fields such as tumor biopsy and pathological diagnosis. However, existing needle sampling devices still have several problems in actual operation.

[0003] First, traditional devices typically require multiple punctures to obtain a sufficient sample, which not only prolongs the operation time but also increases patient pain and the risk of complications. Second, for tough tissues such as fibrosis and calcification, conventional puncture needles have low cutting efficiency, which can easily lead to sample fragmentation or incomplete sampling, affecting the accuracy of pathological analysis. In addition, the existing devices have cumbersome operating procedures during the sampling process, rely on the high technical level of medical personnel, and there is a risk of contamination or loss in the sample collection and transfer process, which reduces the overall sampling success rate. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides an ultrasound-guided puncture needle sampling device, which effectively solves the problems of existing sampling devices requiring multiple punctures, insufficient integrity in tough tissue sampling, and poor sample aspiration and temporary storage stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides an ultrasound-guided puncture needle sampling device, comprising:

[0007] The needle tube has a sliding cavity inside, and a sampling cavity communicating with the sliding cavity is opened on the outer wall of the distal end of the needle tube. The sampling cavity is used to allow the tissue to be sampled to enter after puncture and positioning.

[0008] A sampling assembly includes a cutting head, a piston plate, an inner sliding rod, and an outer sliding sleeve. The cutting head is slidably and sealed within the sliding cavity and can move along the axial direction of the needle tube and rotate around the axis of the needle tube. A cutting edge is provided at one end of the cutting head near the sampling cavity. The piston plate is slidably and sealed within the cutting head. The inner sliding rod is connected to the piston plate, and the outer sliding sleeve is connected to the cutting head.

[0009] A needle body base is disposed at one end of the needle tube. The inner sliding rod and the outer sliding sleeve pass through the needle body base and are used to transmit the sample suction action and the cutting action, respectively.

[0010] A driving assembly, which is connected to the outer sliding sleeve, is used to drive the cutting head to move forward and rotate from the yielding state toward the sampling cavity, so that the blade can perform rotary cutting on the tissue entering the sampling cavity;

[0011] The inner sliding rod and the outer sliding sleeve can selectively move synchronously or desynchronize. In the synchronous state, the outer sliding sleeve drives the cutting head to retract so that the tissue enters the sampling chamber. In the desynchronized state, the inner sliding rod can drive the piston plate to move backward relative to the cutting head so as to draw in the cut tissue sample and temporarily store it in the cutting head, thereby enabling continuous sampling after one puncture positioning.

[0012] Preferably, the needle body base has an extension on the side near the needle tube, the extension is connected to the needle tube, and the outer sliding sleeve and the inner sliding rod are both inserted into the extension, so that a channel is formed between the needle tube and the needle body base for the axial movement and rotational transmission of the sampling assembly.

[0013] Preferably, the driving assembly includes a linkage plate, a stretching tube, a second connecting rod, and a first spring. The linkage plate is connected to the outer sliding sleeve, and the stretching tube is connected to the linkage plate through multiple second connecting rods. The first spring is disposed between the linkage plate and the needle base, and is used to compress and store energy when the stretching tube is pulled back, and after release, push the outer sliding sleeve through the linkage plate to move the cutting head forward toward the sampling chamber.

[0014] Preferably, the drive assembly further includes a sliding ring, a docking empty tube, a rotating ring, and a coil spring. The sliding ring is slidably disposed along the axial direction of the needle body base. The rotating ring is rotatably disposed within the sliding ring. The docking empty tube is connected to the rotating ring and the outer sliding sleeve respectively. The coil spring is disposed between the sliding ring and the docking empty tube and is used to store torsional force when the docking empty tube rotates, and to drive the outer sliding sleeve to rotate and cut the cutting head when released.

[0015] Preferably, the drive assembly further includes a pull tube, which is connected to one side of the docking empty tube and sleeved on the outside of the inner slide rod. The pull tube is used to drive the docking empty tube to pull back and rotate, so that the first spring forms axial energy storage and the coil spring forms rotational energy storage.

[0016] Preferably, the pull tube has multiple insertion holes along its length, the inner slide rod has a locking block, and also includes an insertion rod. The insertion rod is used to insert into the insertion hole and cooperate with the locking block, so that the inner slide rod moves synchronously with the pull tube. When the insertion rod disengages from the insertion hole and the locking block, the inner slide rod can move independently relative to the pull tube to drive the piston plate to move backward and form a negative pressure sampling state.

[0017] Preferably, the drive assembly further includes a second limiting ring disposed inside the pull tube. The second limiting ring is used to limit the movement range of the locking block along the pull tube to prevent it from disengaging from the effective sealing position when the inner slide rod drives the piston plate to move backward to aspirate the sample.

[0018] Preferably, the sampling assembly further includes a first limiting ring, which is fixedly disposed inside the cutting head and close to the blade. The first limiting ring is used to limit the movement of the piston plate toward the blade and to guide the tissue sample entering the cutting head.

[0019] Preferably, it further includes a limiting component, which includes a mounting base, a rotating plate, a clamping head, an arc-shaped retaining ring, a second spring, and a pressing plate. The mounting base is disposed on the needle body base, the rotating plate is rotatably disposed on the mounting base, the clamping head is disposed on the rotating plate and is used to engage with the groove formed between the arc-shaped retaining ring, the second spring is used to push the rotating plate to keep the clamping head in a limited state, and the pressing plate is slidably disposed on the mounting base and connected to the rotating plate, and is used to drive the clamping head out of the groove after being pressed, so as to release the stored capacity of the first spring and the coil spring, and enable the cutting head to complete the forward movement and rotational cutting action.

[0020] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0021] First, through the cooperation of the needle, sampling chamber, cutting head, piston plate, inner sliding rod, outer sliding sleeve and drive assembly, after a puncture and positioning is completed under ultrasound guidance, the tissue to be sampled can first enter the sampling chamber, and then the cutting head moves forward and rotates to cut in the sliding chamber. The cut tissue sample can be sucked into the cutting head by the negative pressure formed by the backward movement of the piston plate, which reduces the number of repeated punctures and sampling, reduces patient pain, and improves the cutting efficiency of tough tissues and the integrity of the sample.

[0022] Secondly, the extension guides the outer sliding sleeve and inner sliding rod, and the first spring and coil spring provide axial thrust and rotational force respectively, making the forward movement and rotary cutting action of the cutting head more stable; the insertion rod, insertion hole and locking block facilitate the switching between cutting action and sampling action; the first limiting ring and the second limiting ring can limit the movement range of the piston plate and inner sliding rod; the limiting component can lock the energy storage state and release it as needed, improving the safety of device operation and the reliability of continuous sampling. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 This is a side view of the structure of the present invention;

[0026] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0027] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0028] Figure 5 This is a cross-sectional view of the sampling component of the present invention;

[0029] Figure 6 for Figure 5 Enlarged structural diagram at point C;

[0030] Figure 7 for Figure 2 Enlarged structural diagram at point A in the middle.

[0031] Reference numerals: 1. Needle tube; 101. Sampling chamber; 2. Sampling assembly; 201. Sliding chamber; 202. Cutting head; 203. First limiting ring; 204. Piston plate; 205. Inner sliding rod; 206. Outer sliding sleeve; 3. Needle body base; 301. Extension; 4. Drive assembly; 401. Linkage plate; 402. Tension tube; 403. Second connecting rod; 404. First spring; 405. Pulling tube; 406. Sliding ring; 407. Connecting empty tube; 408. Rotating ring; 409. Coil spring; 410. Locking block; 411. Insertion hole; 412. Insertion rod; 413. Second limiting ring; 5. Limiting assembly; 501. Mounting base; 502. Rotating plate; 503. Locking head; 504. Arc-shaped locking ring; 505. Second spring; 506. Squeezing plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The present invention will be further described below with reference to embodiments.

[0034] Example: Refer to Figures 1 to 7 An ultrasound-guided puncture needle sampling device, comprising:

[0035] The needle tube 1 has a sliding cavity 201 formed inside it. The outer wall of the distal end of the needle tube 1 has a sampling cavity 101 that communicates with the sliding cavity 201. The sampling cavity 101 is used to allow the tissue to be sampled to enter after puncture positioning.

[0036] Sampling assembly 2 includes a cutting head 202, a piston plate 204, an inner sliding rod 205, and an outer sliding sleeve 206. The cutting head 202 is slidably disposed in the sliding cavity 201 and can move along the axial direction of the needle tube 1 and rotate around the axis of the needle tube 1. A cutting edge is provided at one end of the cutting head 202 near the sampling cavity 101. The piston plate 204 is slidably disposed in the cutting head 202. The inner sliding rod 205 is connected to the piston plate 204, and the outer sliding sleeve 206 is connected to the cutting head 202. The space between the cutting edge and the piston plate 204 in the cutting head 202 forms a sample storage section.

[0037] Needle base 3 is located at one end of needle tube 1. Inner sliding rod 205 and outer sliding sleeve 206 pass through needle base 3 and are used to transmit sample suction and cutting actions, respectively.

[0038] The drive assembly 4 is connected to the outer sliding sleeve 206 for driving the cutting head 202 to move forward and rotate from the yielding state toward the sampling chamber 101, so that the blade can perform rotary cutting on the tissue entering the sampling chamber 101. The yielding state means that the cutting head 202 is moved to the side of the sampling chamber 101 near the needle body base 3, so that the sampling chamber 101 is at least partially open.

[0039] The inner slide rod 205 and the outer slide sleeve 206 can selectively move synchronously or desynchronize. In the synchronous state, the outer slide sleeve 206 drives the cutting head 202 to retract so that the tissue enters the sampling chamber 101. In the desynchronized state, the inner slide rod 205 can drive the piston plate 204 to move backward relative to the cutting head 202 so as to draw in the cut tissue sample and temporarily store it in the cutting head 202, thereby enabling continuous sampling after one puncture positioning.

[0040] Reference Figures 1 to 4An extension 301 is provided on the side of the needle body base 3 near the needle tube 1. The extension 301 is connected to the needle tube 1. The outer sliding sleeve 206 and the inner sliding rod 205 are both inserted into the extension 301 so that a channel for axial movement and rotational transmission of the sampling component 2 is formed between the needle tube 1 and the needle body base 3.

[0041] Reference Figures 5 to 6 The drive assembly 4 includes a linkage plate 401, a stretching tube 402, a second connecting rod 403, and a first spring 404. The linkage plate 401 is connected to the outer sliding sleeve 206. The stretching tube 402 is connected to the linkage plate 401 via multiple second connecting rods 403. The first spring 404 is located between the linkage plate 401 and the needle base 3. It is used to compress and store energy when the stretching tube 402 is pulled back, and after release, it pushes the outer sliding sleeve 206 through the linkage plate 401 to move the cutting head 202 forward toward the sampling chamber 101. The cooperation between the sampling chamber 101 and the cutting head 202 within the needle tube 1 allows the sampled tissue to first enter the sampling chamber 101 and then be cut by the cutting head 202. This avoids the needle tube 1 directly squeezing the tissue during advancement, which could cause the sample to be pushed away from the sampling position, thus improving the accuracy of the sampling position. At the same time, the cutting head 202 moves forward and rotates within the sliding chamber 201, allowing the blade to complete the cut with a shorter stroke, reducing the amplitude of the needle tube 1's movement within the patient's body and lowering the risk of surrounding tissues being pulled or torn.

[0042] Reference Figures 5 to 6 The drive assembly 4 also includes a sliding ring 406, a docking empty tube 407, a rotating ring 408, and a coil spring 409. The sliding ring 406 is slidably disposed along the axial direction of the needle body base 3. The rotating ring 408 is rotatably disposed inside the sliding ring 406. The docking empty tube 407 is connected to the rotating ring 408 and the outer sliding sleeve 206 respectively. The coil spring 409 is disposed between the sliding ring 406 and the docking empty tube 407, and is used to store torsional force when the docking empty tube 407 rotates, and to drive the outer sliding sleeve 206 to drive the cutting head 202 to rotate and cut when released.

[0043] Reference Figures 5 to 6 The drive assembly 4 also includes a pull tube 405, which is connected to one side of the docking empty tube 407 and sleeved on the outside of the inner slide rod 205. The pull tube 405 is used to drive the docking empty tube 407 to pull back and rotate, so that the first spring 404 forms axial energy storage and the coil spring 409 forms rotational energy storage.

[0044] Reference Figures 5 to 6The pull tube 405 has multiple insertion holes 411 along its length. The inner slide rod 205 has a locking block 410 and also includes an insertion rod 412. The insertion rod 412 is inserted into the insertion hole 411 and cooperates with the locking block 410, allowing the inner slide rod 205 to move synchronously with the pull tube 405. When the insertion rod 412 disengages from the insertion hole 411 and the locking block 410, the inner slide rod 205 can move independently relative to the pull tube 405, thereby driving the piston plate 204 to move backward to form a negative pressure sampling state, which is achieved through the limiting component. The locking head 503 in step 5 cooperates with the arc-shaped retaining ring 504 to stably lock the first spring 404 and the coil spring 409 after energy storage, preventing accidental release by the operator when adjusting the position of the needle tube 1 or waiting for ultrasound confirmation; when the squeezing plate 506 is pressed, the rotating plate 502 drives the locking head 503 to disengage from the arc-shaped retaining ring 504, and the first spring 404 and the coil spring 409 are released simultaneously, so that the cutting head 202 can quickly complete the forward movement and rotary cutting action at a certain position, improving the controllability of the sampling timing.

[0045] Reference Figures 4 to 5 The drive assembly 4 also includes a second limiting ring 413, which is disposed inside the pull tube 405. The second limiting ring 413 is used to limit the movement range of the block 410 along the pull tube 405 so as to prevent the inner slide rod 205 from moving the piston plate 204 backward to aspirate the sample and thus disengaging from the effective sealing position.

[0046] Reference Figure 4 The sampling assembly 2 also includes a first limiting ring 203, which is fixedly disposed inside the cutting head 202 and close to the blade. The first limiting ring 203 is used to limit the movement of the piston plate 204 toward the blade and guide the tissue sample entering the cutting head 202. The second limiting ring 413 limits the movement range of the locking block 410, so that the inner slide rod 205 will not exceed the effective stroke of the pulling tube 405 when it drives the piston plate 204 to move backward to aspirate the sample. This prevents the piston plate 204 from disengaging from the sealing position of the cutting head 202, thereby ensuring that a stable negative pressure can be formed inside the cutting head 202 and improving the continuity and sealing of the sampling process.

[0047] Reference Figure 7 It also includes a limiting component 5, which includes a mounting base 501, a rotating plate 502, a clamping head 503, an arc-shaped retaining ring 504, a second spring 505, and a pressing plate 506. The mounting base 501 is disposed on the needle body base 3. The rotating plate 502 is rotatably disposed on the mounting base 501. The clamping head 503 is disposed on the rotating plate 502 and is used to cooperate with the groove formed between the arc-shaped retaining ring 504. The second spring 505 is used to push the rotating plate 502 to keep the clamping head 503 in a limited state. The pressing plate 506 is slidably disposed on the mounting base 501 and connected to the rotating plate 502. It is used to drive the clamping head 503 out of the groove after being pressed, so as to release the stored capacity of the first spring 404 and the coil spring 409, so that the cutting head 202 can complete the forward movement and rotational cutting action.

[0048] The working principle of this invention is as follows:

[0049] In use, first insert the insertion rod 412 into the insertion hole 411 on the pull tube 405, and make the insertion rod 412 cooperate with the locking block 410 on the inner slide rod 205. At this time, the inner slide rod 205 can move synchronously with the pull tube 405 and the outer slide sleeve 206. The piston plate 204 and the cutting head 202 maintain a relative position. Then, the needle tube 1 is inserted into the patient's body under ultrasound guidance, so that the sampling cavity 101 at the distal end of the needle tube 1 corresponds to the location of the tissue to be sampled.

[0050] Before sampling, the operator presses the extrusion plate 506, which pushes the rotating plate 502 to rotate relative to the mounting base 501, causing the clamping head 503 on the rotating plate 502 to disengage from the groove of the arc-shaped retaining ring 504. Then, the operator pulls and rotates the pulling tube 405, which drives the docking empty tube 407 to move and rotate synchronously. The docking empty tube 407 rotates relative to the sliding ring 406 through the rotating ring 408, causing the coil spring 409 to be wound up and store energy. At the same time, the sliding ring 406 slides along the axial direction of the needle body base 3, and the docking empty tube 407 drives the outer sliding sleeve 206 to move backward. The outer sliding sleeve 206 drives the linkage plate 401 and the stretching tube 402 to move. The stretching tube 402 pulls the linkage plate 401 through the second connecting rod 403, causing the first spring 404 to be compressed and store energy.

[0051] During the backward movement of the outer sliding sleeve 206, the outer sliding sleeve 206 drives the cutting head 202 to retract towards the needle base 3 within the sliding cavity 201, so that the sampling cavity 101 is in an open state, allowing the tissue to be sampled to enter the sampling cavity 101. Since the insertion rod 412 and the locking block 410 are in a cooperating state, the inner sliding rod 205 and the piston plate 204 move backward synchronously with the outer sliding sleeve 206, preventing the piston plate 204 from forming an excessive relative displacement in the cutting head 202 in advance, thus keeping the cutting head 202 stable during the sampling preparation stage.

[0052] After the first spring 404 and the coil spring 409 have finished storing energy, the compression plate 506 is released, and the second spring 505 pushes the rotating plate 502 to reset. The rotating plate 502 drives the clamp head 503 to re-clamp into the groove of the arc-shaped clamp ring 504. At this time, the clamp head 503 and the arc-shaped clamp ring 504 cooperate to restrict the axial movement and rotation of the pulling tube 405, the docking empty tube 407 and the outer sliding sleeve 206, so that the first spring 404 and the coil spring 409 remain in the stored energy state, which makes it easier for the operator to reconfirm the position of the sampling chamber 101 under ultrasound.

[0053] After confirming that the sampling chamber 101 is aligned with the tissue to be sampled, the squeezing plate 506 is pressed again. The squeezing plate 506 drives the rotating plate 502 to rotate, and the rotating plate 502 drives the chuck 503 to disengage from the slot of the arc-shaped retaining ring 504. After the chuck 503 is released from its limit, the first spring 404 releases its elastic force and pushes the linkage plate 401 to move towards the sampling chamber 101. The linkage plate 401 drives the outer sliding sleeve 206 to move forward. At the same time, the coil spring 409 releases its torsional force and drives the docking empty tube 407 to rotate. The docking empty tube 407 drives the outer sliding sleeve 206 to rotate synchronously. The outer sliding sleeve 206 further drives the cutting head 202 to move forward in the sliding chamber 201 and rotate around the axis of the needle tube 1, so that the blade of the cutting head 202 performs rotary cutting on the tissue entering the sampling chamber 101, thereby completing the tissue cutting.

[0054] After the tissue is cut by the cutting head 202, the insertion rod 412 is pulled out, causing the insertion rod 412 to disengage from the insertion hole 411 and the locking block 410. At this time, the inner slide rod 205 is released from its synchronous relationship with the pulling tube 405. The operator pulls the inner slide rod 205 backward, which drives the piston plate 204 to move backward within the cutting head 202. A negative pressure suction space is formed between the piston plate 204 and the cutting head 202, so that the cut tissue sample is sucked into the cutting head 202 and temporarily stored in the internal space of the cutting head 202. The first limiting ring 203 restricts the front end position of the piston plate 204 and guides the tissue sample entering the cutting head 202. The second limiting ring 413 restricts the backward movement range of the locking block 410 to prevent the inner slide rod 205 from being pulled back too much, causing the piston plate 204 to disengage from the sealing position of the cutting head 202.

[0055] When sampling is required to continue, the insertion rod 412 can be reinserted into the corresponding insertion hole 411 according to the required stroke, and the insertion rod 412 can be made to cooperate with the locking block 410 again, so that the inner sliding rod 205 moves synchronously with the pulling tube 405 and the outer sliding sleeve 206. Then the energy storage process of pulling and rotating the pulling tube 405 is repeated and locked by the limiting component 5. After the sampling position is confirmed by ultrasound, the limiting component 5 is released, so that the first spring 404 and the coil spring 409 drive the cutting head 202 to complete the forward rotation and cutting. Thus, multiple cutting and sample collection can be completed after the needle tube 1 is punctured and positioned once, reducing the number of times the needle tube 1 is repeatedly pulled out and re-punctured, reducing patient pain, and improving the integrity of sample acquisition.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrasound-guided puncture needle sampling device, characterized in that, include: A needle tube (1) is provided, a sliding cavity (201) is formed inside the needle tube (1), and a sampling cavity (101) communicating with the sliding cavity (201) is provided on the outer wall of the distal end of the needle tube (1). The sampling cavity (101) is used to allow the tissue to be sampled to enter after puncture positioning. The sampling assembly (2) includes a cutting head (202), a piston plate (204), an inner sliding rod (205), and an outer sliding sleeve (206). The cutting head (202) is sealed and slidably disposed in the sliding cavity (201) and can move along the axial direction of the needle tube (1) and rotate around the axis of the needle tube (1). The cutting head (202) has a cutting edge at one end near the sampling cavity (101). The piston plate (204) is sealed and slidably disposed in the cutting head (202). The inner sliding rod (205) is connected to the piston plate (204), and the outer sliding sleeve (206) is connected to the cutting head (202). Needle base (3), the needle base (3) is disposed at one end of the needle tube (1), the inner slide rod (205) and the outer slide sleeve (206) pass through the needle base (3) and are respectively used to transmit the sample suction action and the cutting action; The driving component (4) is connected to the outer sliding sleeve (206) for driving the cutting head (202) to move forward and rotate from the yielding state toward the sampling chamber (101), so that the blade can spin cut the tissue entering the sampling chamber (101); The inner slide bar (205) and the outer slide sleeve (206) can selectively move synchronously or desynchronize. In the synchronous state, the outer slide sleeve (206) drives the cutting head (202) to retract so that the tissue enters the sampling chamber (101). In the desynchronized state, the inner slide bar (205) can drive the piston plate (204) to move backward relative to the cutting head (202) so as to suck up the cut tissue sample and temporarily store it in the cutting head (202), thereby continuously sampling after one puncture positioning.

2. The ultrasound-guided puncture needle sampling device according to claim 1, characterized in that, The needle base (3) is provided with an extension (301) on the side near the needle tube (1). The extension (301) is connected to the needle tube (1). The outer sliding sleeve (206) and the inner sliding rod (205) are both inserted into the extension (301) so that a channel is formed between the needle tube (1) and the needle base (3) for the axial movement and rotational transmission of the sampling assembly (2).

3. The ultrasound-guided puncture needle sampling device according to claim 1, characterized in that, The drive assembly (4) includes a linkage plate (401), a stretching tube (402), a second connecting rod (403), and a first spring (404). The linkage plate (401) is connected to the outer sliding sleeve (206). The stretching tube (402) is connected to the linkage plate (401) through multiple second connecting rods (403). The first spring (404) is disposed between the linkage plate (401) and the needle base (3) for compressing and storing energy when the stretching tube (402) is pulled back, and after release, it pushes the outer sliding sleeve (206) through the linkage plate (401) to drive the cutting head (202) to move forward toward the sampling chamber (101).

4. The ultrasound-guided puncture needle sampling device according to claim 3, characterized in that, The drive assembly (4) further includes a sliding ring (406), a docking tube (407), a rotating ring (408), and a coil spring (409). The sliding ring (406) is slidably disposed along the axial direction of the needle body base (3). The rotating ring (408) is rotatably disposed within the sliding ring (406). The docking tube (407) is connected to the rotating ring (408) and the outer sliding sleeve (206) respectively. The coil spring (409) is disposed between the sliding ring (406) and the docking tube (407) for storing torsional force when the docking tube (407) rotates, and for driving the outer sliding sleeve (206) to drive the cutting head (202) to rotate and cut when released.

5. The ultrasound-guided puncture needle sampling device according to claim 4, characterized in that, The drive assembly (4) further includes a pull tube (405), which is connected to one side of the docking empty tube (407) and sleeved on the outside of the inner slide rod (205). The pull tube (405) is used to drive the docking empty tube (407) to pull back and rotate, so that the first spring (404) forms axial energy storage and the coil spring (409) forms rotational energy storage.

6. The ultrasound-guided puncture needle sampling device according to claim 5, characterized in that, The pull tube (405) has multiple insertion holes (411) along its length. The inner slide rod (205) is provided with a locking block (410) and also includes an insertion rod (412). The insertion rod (412) is used to insert into the insertion hole (411) and cooperate with the locking block (410) so that the inner slide rod (205) moves synchronously with the pull tube (405). When the insertion rod (412) is disengaged from the insertion hole (411) and the locking block (410), the inner slide rod (205) can move independently relative to the pull tube (405) to drive the piston plate (204) to move backward to form a negative pressure sampling state.

7. The ultrasound-guided puncture needle sampling device according to claim 6, characterized in that, The drive assembly (4) further includes a second limiting ring (413), which is disposed inside the pull tube (405). The second limiting ring (413) is used to limit the movement range of the block (410) along the pull tube (405) to prevent the inner slide rod (205) from moving backward and disengaging from the effective sealing position when the piston plate (204) is moved backward to aspirate the sample.

8. The ultrasound-guided puncture needle sampling device according to claim 4, characterized in that, The sampling assembly (2) further includes a first limiting ring (203), which is fixedly disposed inside the cutting head (202) and close to the blade. The first limiting ring (203) is used to limit the movement of the piston plate (204) toward the blade and guide the tissue sample entering the cutting head (202).

9. The ultrasound-guided puncture needle sampling device according to claim 5, characterized in that, It also includes a limiting component (5), which includes a mounting base (501), a rotating plate (502), a clamping head (503), an arc-shaped retaining ring (504), a second spring (505), and a pressing plate (506). The mounting base (501) is disposed on the needle body base (3), the rotating plate (502) is rotatably disposed on the mounting base (501), and the clamping head (503) is disposed on the rotating plate (502) and used to engage with the arc-shaped retaining ring (504). The slots formed between the two are engaged, and the second spring (505) is used to push the rotating plate (502) to keep the clamp head (503) in a limited position. The pressing plate (506) is slidably disposed on the mounting base (501) and connected to the rotating plate (502). It is used to drive the clamp head (503) out of the slot after being pressed, so as to release the stored capacity of the first spring (404) and the coil spring (409) and enable the cutting head (202) to complete the forward movement and rotation cutting action.

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