Rotary-cut biopsy sampling device under endoscope

Abstract

The invention discloses an endoscopic rotary-cut biopsy sampling device, and relates to the technical field of medical instruments, the endoscopic rotary-cut biopsy sampling device comprises an outer sleeve in a slender shape, and the side wall, close to the front end, of the outer sleeve is provided with a sampling port; the sampling box body is fixedly connected to the tail end of the outer sleeve, the top of the sampling box body is open, and a sampling chamber is formed in the sampling box body; the handle is mounted on one side, far away from the outer sleeve, of the sampling box body; the interior of the cutting pipe is hollow, the cutting pipe is rotatably and coaxially sleeved with the outer sleeve, and a cutting edge is arranged at the front end of the cutting pipe; the driving adjusting assembly is installed in the handle, connected with the tail end of the cutting pipe and used for driving the cutting pipe to move and rotate in the outer sleeve; by arranging the angle pre-adjusting and locking assembly which can be independently adjusted and locked, accurate and visual control over the orientation of a sampling opening is achieved, the rotary cutting function, the negative pressure suction function and the sample collection function are integrated, the problem that a hard sampling device is difficult to align is effectively solved, and the operation accuracy and the sampling success rate are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an endoscopic rotary biopsy sampling device. BACKGROUND

[0002] Endoscopic rotary biopsy is an important technique for diagnosing intracavitary protruding, submucosal or deep lesions. There is a special rotary biopsy device in clinical practice, the outer sleeve and inner cutting tube of which are made of rigid materials such as stainless steel, and the whole is not bendable, aiming to provide stronger support and more stable cutting platform, suitable for relatively flat cavities such as esophagus and rectum or parts that need to resist tissue resistance.

[0003] However, such hard devices face a specific and prominent operability problem in clinical application: due to its overall rigidity, it is very difficult and not accurate to adjust the orientation of the sampling window to align with the poorly angled or angled lesion tissue after reaching the target area through the endoscopic channel. Doctors often need to rotate the entire handle or even the endoscope body to drive the orientation adjustment of the distal sampling window of the device. This process has obvious defects: first, the operation of rotating the entire device is large in amplitude and not fine enough, which can easily interfere with the field of view or touch non-target tissues in a narrow space; second, due to the twisting gap and friction of the endoscopic channel, the rotation angle of the handle cannot be accurately and one-to-one transmitted to the distal sampling window, resulting in that the doctor's judgment of the actual orientation of the sampling window mainly depends on the observation of the endoscopic field of view and the estimation of the hand feeling, which is uncertain, especially when dealing with small lesions located on the side wall of the cavity, which may prolong the preoperative preparation time and affect the success rate of one-time sampling. SUMMARY

[0004] The purpose of the present application is to provide an endoscopic rotary biopsy sampling device to solve the problem that the angle of the distal sampling window of the hard rotary biopsy device in the prior art cannot be independently, accurately and intuitively adjusted and locked.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: an endoscopic rotary biopsy sampling device, comprising an outer sleeve, which is elongated, a sampling port is formed on the side wall near the front end of the outer sleeve; a sampling box body is fixedly connected to the tail end of the outer sleeve, the top of the sampling box body is open and a sampling chamber is formed inside; a handle is installed on the side of the sampling box body away from the outer sleeve; a cutting tube is hollow inside and coaxially sleeved in the outer sleeve, a cutting edge is arranged at the front end of the cutting tube; a driving and adjusting assembly is installed in the handle and connected with the tail end of the cutting tube, used for driving the cutting tube to move and rotate in the outer sleeve; A negative pressure device, installed inside the handle and connected to the outer tube, is used to draw tissue samples through the sampling port; An angle pre-adjustment locking component is installed between the sampling box body and the handle to adjust and lock the rotation angle of the sampling box body and the outer tube relative to the handle.

[0006] Furthermore, the outer sheath and the cutting tube are made of medical-grade stainless steel, titanium alloy, or hard engineering plastic, and the outer wall of the outer sheath has spaced distance scale lines along its length.

[0007] Furthermore, the top opening of the sampling box is provided with slots on both sides, the top of the sampling box is provided with a transparent cover, the bottom of the transparent cover is provided with a locking strip that cooperates with the slots, and the cutting tube extends through the sampling box to the inside of the handle.

[0008] Furthermore, the drive adjustment assembly includes a drive motor, a sealing ring, and a sliding block. The sealing ring is fixedly disposed inside the handle, dividing the inside of the handle into a negative pressure chamber and an installation chamber. The negative pressure component is disposed in the negative pressure chamber, and the drive motor is disposed in the installation chamber. Its output shaft is connected to the cutting tube. A power supply is also provided in the installation chamber, and the power supply is electrically connected to the drive motor and the negative pressure component.

[0009] Furthermore, a sliding groove is provided on the outer wall of the handle along its length direction, the cross-section of the sliding block is inverted T-shaped, the top of the vertical section of the sliding block is fixedly connected to the bottom of the drive motor and passes through the sliding groove, and the horizontal section of the sliding block extends to the outside of the handle.

[0010] Furthermore, the outer wall of the handle is provided with spaced anti-slip textures, and the outer wall of the handle is also provided with a control switch, which is electrically connected to the negative pressure component. The tail end of the handle is provided with a charging interface for charging the power source.

[0011] Furthermore, the angle pre-adjustment locking assembly includes a mounting ring, a locking ball, a return spring, a sliding ring, and a mounting hook plate. The mounting ring is fixedly connected to the tail end of the sampling box body. The outer periphery of the mounting ring is provided with multiple annularly distributed mounting grooves. The locking ball is movably disposed in the mounting groove, with part of the ball protruding from the mounting groove. The return spring is disposed at the bottom of the mounting groove, and its top end abuts against the locking ball.

[0012] Furthermore, the sliding ring is slidably sleeved on one end of the handle near the sampling box body. The inner wall of the sliding ring is provided with an embedding groove that cooperates with the locking ball. The outer wall of the handle is symmetrically provided with arc-shaped docking grooves. The mounting hook plate is made of plastic and has an L-shaped cross-section. The horizontal section of the mounting hook plate is symmetrically fixed to the side of the mounting ring near the handle, and the vertical section of the mounting hook plate is inserted into the arc-shaped docking groove.

[0013] Furthermore, the sliding ring has an insertion groove at one end near the handle, the front end of the handle is inserted into the insertion groove, the inner top wall of the insertion groove has multiple annularly distributed limiting protrusions, the outer wall of the front end of the handle has annularly distributed limiting grooves, the limiting protrusions cooperate with the limiting grooves, and the outer wall of the sliding ring has annularly distributed angle scale lines.

[0014] Compared with existing technologies, the endoscopic rotary biopsy sampling device provided by this invention effectively solves the technical problem of difficulty in accurately controlling and locking the orientation of the distal sampling window during operation of existing rigid rotary biopsy sampling devices by setting an independent angle pre-adjustment and locking component. Specifically, this device allows the physician to operate the angle adjustment mechanism between the sampling box and the handle before sampling, enabling the sampling port on the outer tube and its side wall to rotate independently relative to the handle and be stably locked at any desired angle. This design allows the physician to directly, precisely, and one-to-one align the sampling port with lesions that are laterally or at tricky angles without having to rotate the entire handle or endoscope body. This not only improves the accuracy and intuitiveness of alignment adjustment and shortens preoperative preparation time, but also significantly reduces interference with the endoscopic field of view and the risk of touching non-target tissue, thereby greatly improving the efficiency and success rate of single-shot sampling, and is especially suitable for handling complex situations such as small lesions on the side walls of cavities. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall endoscopic biopsy sampling device provided in this embodiment of the invention. Figure 1 ; Figure 2 A schematic diagram of the overall endoscopic biopsy sampling device provided in this embodiment of the invention. Figure 2 ; Figure 3 This is a schematic diagram showing the disassembled structure of the sampling box and transparent cover, etc., provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the handle component structure provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the internal overall structure of the handle component provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of components such as the mounting ring and mounting hook plate provided in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the internal structure of the mounting ring provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the sliding ring component structure provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Outer tube; 101. Sampling port; 2. Sampling box body; 201. Sampling chamber; 3. Handle; 4. Cutting tube; 5. Cutting blade; 6. Negative pressure component; 7. Distance scale line; 8. Slot; 9. Transparent cover plate; 10. Locking strip; 11. Drive motor; 12. Sealing ring; 13. Sliding block; 14. Negative pressure chamber; 15. Mounting chamber; 16. Power supply; 17. Sliding groove; 18. Anti-slip texture; 19. Control switch; 20. Mounting ring; 21. Locking ball; 22. Return spring; 23. Sliding ring; 24. Mounting hook plate; 25. Mounting groove; 26. Embedded groove; 27. Arc-shaped docking groove; 28. Insertion circular groove; 29. ​​Limiting protrusion; 30. Limiting groove; 31. Angle scale line. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] As attached Figure 1 To be continued Figure 8 As shown: The present invention provides an endoscopic biopsy sampling device, including an outer tube 1, which is long and thin, and a sampling port 101 is provided on the side wall near the front end of the outer tube 1; The sampling box body 2 is fixedly connected to the tail end of the outer tube 1. The top of the sampling box body 2 is open and a sampling chamber 201 is formed inside. The handle 3 is installed on the side of the sampling box 2 away from the outer tube 1; The cutting tube 4 is hollow inside and is rotatably and coaxially sleeved inside the outer tube 1. The front end of the cutting tube 4 is provided with a cutting blade 5. A drive adjustment assembly is installed inside the handle 3 and connected to the tail end of the cutting tube 4, used to drive the cutting tube 4 to move and rotate within the outer sleeve 1; The negative pressure component 6 is installed inside the handle 3 and communicates with the outer tube 1, and is used to draw tissue samples through the sampling port 101. An angle pre-adjustment locking component is installed between the sampling box body 2 and the handle 3 to adjust and lock the rotation angle of the sampling box body 2 and the outer tube 1 relative to the handle 3.

[0020] It should be noted that by setting up an independent angle pre-adjustment locking component, the technical challenge of accurately controlling and locking the orientation of the distal sampling window during operation of existing rigid rotary biopsy sampling devices is effectively solved. Specifically, this device allows the physician to operate the angle adjustment mechanism between the sampling box 2 and the handle 3 before sampling, enabling the outer tube 1 and the sampling port 101 on its side wall to rotate independently relative to the handle 3 and be stably locked at any desired angle. This design allows the physician to directly, precisely, and one-to-one align the sampling port 101 with lateral or tricky-angled lesions without having to rotate the entire handle 3 or the endoscope body. This not only improves the accuracy and intuitiveness of alignment adjustment and shortens preoperative preparation time, but also significantly reduces interference with the endoscopic field of view and the risk of touching non-target tissues, thereby greatly improving the efficiency and success rate of single-shot sampling, especially suitable for handling complex situations such as small lesions on the side walls of cavities.

[0021] Specifically, the negative pressure component 6 is installed in the negative pressure chamber 14 isolated by the sealing ring 12. The negative pressure chamber 14 is connected to the inner cavity of the hollow cutting tube 4 through a channel designed inside the handle 3 (or directly through the annular gap reserved at the connection between the tail end of the cutting tube 4 and the drive motor 11), and then connected to the inner cavity of the outer tube 1, ultimately forming a continuous negative pressure suction channel from the sampling port 101 to the negative pressure source.

[0022] In this embodiment: the outer sleeve 1 and the cutting tube 4 are made of medical stainless steel, titanium alloy or hard engineering plastic, and the outer wall of the outer sleeve 1 is provided with spaced distance scale lines 7 along its length.

[0023] It should be noted that the use of medical-grade stainless steel, titanium alloy, or hard engineering plastics ensures that the outer cannula 1 and the cutting tube 4 possess sufficient rigidity, biocompatibility, and corrosion resistance, providing stable support within the endoscopic channel and withstanding the mechanical stress during cutting and rotation. The distance scale lines 7 on the outer wall of the outer cannula 1 provide doctors with a direct depth reference. After the device enters the body cavity through the endoscopic forceps channel, doctors can accurately determine the depth of the sampling port 101 into the target area based on the endoscopic view and the scale lines, facilitating positioning and repeated sampling operations, and improving the standardization and repeatability of the procedure.

[0024] In this embodiment: the top opening of the sampling box 2 is provided with slots 8 on both sides, the top of the sampling box 2 is provided with a transparent cover plate 9, the bottom of the transparent cover plate 9 is provided with a locking strip 10 that cooperates with the slots 8, and the cutting tube 4 extends through the sampling box 2 into the handle 3.

[0025] It should be noted that the slot 8 at the top of the sampling container 2 and the retaining strip 10 at the bottom of the transparent cover 9 form a convenient detachable connection structure. After sampling, the doctor can easily remove the transparent cover 9 and directly and quickly retrieve the tissue sample from the sampling chamber 201, avoiding the inconvenience and risk of sample damage associated with reverse sampling through complex tubing. The design of the transparent cover 9 allows direct observation of the sample size, shape, and quantity without opening the cover, facilitating rapid intraoperative assessment of sample adequacy. The cutting tube 4 extends through the sampling container 2 into the handle 3, ensuring the continuity and sealing of the power transmission path from the cutting tip to the drive assembly, allowing the sample to be smoothly aspirated and temporarily stored in the sampling chamber 201.

[0026] In this embodiment: the drive adjustment assembly includes a drive motor 11, a sealing ring 12, and a sliding block 13. The sealing ring 12 is fixedly disposed inside the handle 3, dividing the inside of the handle 3 into a negative pressure chamber 14 and an installation chamber 15. The negative pressure component 6 is disposed in the negative pressure chamber 14. The drive motor 11 is disposed in the installation chamber 15, and its output shaft is connected to the cutting tube 4. The installation chamber 15 is also provided with a power supply 16, which is electrically connected to the drive motor 11 and the negative pressure component 6.

[0027] It should be noted that the drive adjustment assembly integrates drive, sealing, and adjustment functions. The drive motor 11 provides power to drive the cutting tube 4 to rotate and move axially, completing the rotary cutting action on the tissue protruding from the sampling port 101. The sealing ring 12 is a key component, which strictly divides the inner cavity of the handle 3 into a negative pressure chamber 14 and an installation chamber 15. Its core functions are: firstly, to prevent the negative pressure generated by the negative pressure component 6 (such as a miniature vacuum pump) from leaking into the installation chamber 15, ensuring that the negative pressure can effectively act on the outer tube 1 and the sampling port 101; secondly, to isolate and protect the drive motor 11 and the power supply 16 in the installation chamber 15 from contamination or corrosion by tissue fluid or cleaning and disinfecting liquids, thereby improving the reliability, safety, and service life of the device. The built-in power supply 16 enables the miniaturization of the device and wireless operation, improving operational flexibility.

[0028] In this embodiment: a sliding groove 17 is provided on the outer wall of the handle 3 along its length direction, the cross section of the sliding block 13 is inverted T-shaped, the top of the vertical section of the sliding block 13 is fixedly connected to the bottom of the drive motor 11 and passes through the sliding groove 17, and the horizontal section of the sliding block 13 extends to the outside of the handle 3.

[0029] It should be noted that the sliding groove 17 and the inverted T-shaped sliding block 13 cooperate to form a manual adjustment mechanism for the axial movement of the cutting tube 4. By applying force to the exposed horizontal section and pushing or pulling the sliding block 13 back and forth, the doctor can drive the drive motor 11 and the cutting tube 4, which are fixed to it, to move back and forth along the axial direction of the outer sleeve 1. This design enables rapid and linear switching between the two stations: the cutting tube 4 extending out of the sampling port 101 for cutting and the retraction for sample transfer. The operation is intuitive and the feedback is clear. The sliding groove 17 guides and limits the movement path of the sliding block 13, ensuring the smoothness and straightness of the movement.

[0030] In this embodiment: the outer wall of the handle 3 is provided with anti-slip textures 18 spaced apart, the outer wall of the handle 3 is also provided with a control switch 19, the control switch 19 is electrically connected to the negative pressure component 6, and the tail end of the handle 3 is provided with a charging interface for charging the power supply 16.

[0031] It should be noted that the anti-slip texture 18 (such as knurling or raised dots) on the outer wall of the handle 3 increases the friction when gripping, ensuring a stable grip even when the gloves are wet and preventing accidental slippage during operation. The handle 3, which integrates the negative pressure component 6 control switch 19, allows the doctor to easily trigger or deactivate the negative pressure adsorption function with their thumb or forefinger while holding the handle 3 with one hand. This achieves coordinated one-handed control of cutting operations and negative pressure adsorption, resulting in a smooth and efficient process. The charging interface at the tail end (such as a Type-C or magnetic interface) facilitates charging of the built-in power supply 16, making the device reusable, reducing the cost per use, and meeting the environmental and economic requirements of modern medical devices.

[0032] In this embodiment: the angle pre-adjustment locking assembly includes a mounting ring 20, a locking ball 21, a return spring 22, a sliding ring 23, and a mounting hook plate 24. The mounting ring 20 is fixedly connected to the tail end of the sampling box body 2. The outer periphery of the mounting ring 20 is provided with a plurality of annularly distributed mounting grooves 25. The locking ball 21 is movably disposed in the mounting groove 25, with part of the ball protruding from the mounting groove 25. The return spring 22 is disposed at the bottom of the mounting groove 25, and its top end abuts against the locking ball 21.

[0033] It should be noted that this part constitutes the core locking mechanism of the angle pre-adjustment locking assembly. The mounting ring 20 rotates integrally with the sampling box 2 and the outer tube 1. Under the preload of the return spring 22, the locking ball 21 always tends to pop outward. When the angle needs to be adjusted, the applied rotational torque must overcome the spring force to retract the locking ball 21 into the mounting groove 25, thereby realizing the rotation of the mounting ring 20 (and the outer tube 1) relative to the handle 3. When the target angle is reached and the locking ball 21 is aligned with the insertion groove 26 on the inner wall of the sliding ring 23, the locking ball 21 springs into the insertion groove 26 under the action of the spring force, producing a "click" feeling and realizing mechanical locking, preventing accidental changes in angle due to external force or vibration during use. Multiple ring-shaped distributed locking balls 21 provide multi-point, balanced locking force, ensuring the stability and reliability of the lock.

[0034] In this embodiment: the sliding ring 23 is slidably sleeved on one end of the handle 3 near the sampling box 2. The inner wall of the sliding ring 23 is provided with an embedding groove 26 that cooperates with the locking ball 21. The outer wall of the handle 3 is symmetrically provided with arc-shaped docking grooves 27. The mounting hook plate 24 is made of plastic and has an L-shaped cross-section. The horizontal section of the mounting hook plate 24 is symmetrically fixed to the side of the mounting ring 20 near the handle 3. The vertical section of the mounting hook plate 24 is inserted into the arc-shaped docking groove 27.

[0035] It should be noted that the sliding ring 23 is the actuator and locking component for angle adjustment. Its inner wall has an embedded groove 26 that engages with the locking ball 21 to achieve locking. During operation, the doctor slides the sliding ring 23 backward (towards the handle 3), causing its inner wall to press the locking ball 21 completely back into the mounting groove 25. At this point, the lock is released, and the doctor can freely rotate the sampling box 2 and the outer tube 1 to the desired angle. Releasing the sliding ring 23 causes it to move forward and reset under its own structure (or with the addition of a light spring). When the inner wall's embedded groove 26 rotates to the corresponding position, it aligns with the locking ball 21, and the spring pushes the ball into the groove to complete the locking. The L-shaped plastic mounting hook plate 24 forms a rotating connection between the sampling box 2 / mounting ring 20 and the handle 3. Its vertical section engages with the arc-shaped mating groove 27 of the handle 3, allowing relative rotation while restricting axial separation. The structure is simple and reliable. The plastic material has a certain degree of elasticity, facilitating assembly and reducing wear.

[0036] In this embodiment: the sliding ring 23 is provided with an insertion groove 28 at one end near the handle 3, the front end of the handle 3 is inserted into the insertion groove 28, the inner top wall of the insertion groove 28 is provided with a plurality of annularly distributed limiting protrusions 29, the outer wall of the front end of the handle 3 is provided with annularly distributed limiting grooves 30, the limiting protrusions 29 cooperate with the limiting grooves 30, and the outer wall of the sliding ring 23 is provided with annularly distributed angle scale lines 31.

[0037] It should be noted that the engagement of the insertion groove 28 with the limiting protrusion 29 and the limiting groove 30 constitutes the axial sliding guide and circumferential anti-rotation mechanism between the sliding ring 23 and the handle 3. The engagement of the limiting protrusion 29 and the limiting groove 30 ensures that the sliding ring 23 can only slide back and forth along the axis of the handle 3 and will not rotate on its own, thus ensuring that the orientation of the embedded groove 26 on its inner wall relative to the handle 3 is fixed. This is the basis for achieving precise angle locking and reading. The annular angle scale line 31 on the outer wall of the sliding ring 23, in conjunction with a fixed reference mark (such as an arrow) on the handle 3, provides the doctor with an intuitive and quantitative angle reference. When adjusting, the doctor can clearly know the deflection angle of the sampling port 101 of the outer cannula 1 relative to the reference of the handle 3, realizing the precision and digitization of angle adjustment, and improving the accuracy and predictability of the operation.

[0038] The specific working process of the device of the present invention is as follows: Preparation and insertion: In the initial state, the cutting tube 4 is located inside the outer cannula 1. The device is inserted into the body cavity through the instrument channel of the endoscope until the sampling port 101 at the front end of the outer cannula 1 approaches the target lesion area.

[0039] Angle Pre-adjustment and Locking: The doctor observes the lesion location through endoscopic imaging. If the orientation of the sampling port 101 needs adjustment, the sliding ring 23 is slid backward in the direction of the handle 3. The inner wall of the sliding ring 23 presses against the locking ball 21, causing it to overcome the elastic force of the return spring 22 and fully retract into the mounting groove 25 of the mounting ring 20. At this time, the angle lock is released. Subsequently, the doctor can rotate the sampling box 2, causing the mounting ring 20 and the outer tube 1 fixed thereto to rotate together, thereby changing the orientation of the sampling port 101. During this process, the vertical section of the plastic mounting hook plate 24 rotates within the arc-shaped docking groove 27 of the handle 3, achieving a rotational connection. The doctor can observe the angle scale line 31 on the outer wall of the sliding ring 23 and the fixing mark on the handle 3 (not shown in the figure, such as a small bump or scale line) to precisely control the rotation angle. When the sampling port 101 is aligned with the lesion, the sliding ring 23 is released. Under the action of a preset reset force between the sliding ring 23 and the handle 3 (for example, the sliding ring 23 and the handle 3 are tightly fitted with appropriate friction, or a light compression spring is set between the sliding ring 23 and the mounting ring 20), the sliding ring 23 slides forward to reset. When the embedding groove 26 on the inner wall of the sliding ring 23 rotates to the position corresponding to the locking ball 21, the locking ball 21 pops out under the elastic force of the reset spring 22, gets into the embedding groove 26, makes a "click" sound, and achieves mechanical locking, thereby fixing the sampling box 2 and the outer tube 1 at the preset angle.

[0040] Cutting and Sampling: After the angle is locked, the doctor operates the control switch 19 with their thumb or forefinger to activate the negative pressure component 6 (specifically a miniature vacuum pump or diaphragm pump). Negative pressure is transmitted through the negative pressure chamber 14, the cutting tube 4, and the inner cavity of the outer tube 1 to the sampling port 101 at the front end, adsorbing and pulling the lesion tissue into the sampling port 101. Next, the doctor pushes the sliding block 13 outside the handle 3 forward, causing the drive motor 11 and the cutting tube 4, which are fixedly connected to it, to move forward axially, so that the cutting blade 5 at the front end of the cutting tube 4 extends out of the sampling port 101. The drive motor 11 is activated, and its output shaft drives the cutting tube 4 to rotate at high speed via a coupling (or direct clamping). Under the combined action of continuous negative pressure suction and rotational cutting, the protruding tissue is severed.

[0041] Sample collection: Under negative pressure, the cut tissue sample is aspirated through the inner lumen of the cutting tube 4 into the sampling chamber 201 of the sampling box 2 for temporary storage. The doctor can directly observe the sample through the transparent cover 9 (preferably made of medical-grade transparent polycarbonate or similar material).

[0042] Removal and Reset: After sampling, turn off the negative pressure and motor. Remove the entire device from the endoscope channel. Pry the transparent cover 9 outwards so that the bottom retaining strip 10 disengages from the slot 8 of the sampling box 2. The cover can then be removed, and the tissue sample in the sampling chamber 201 can be easily removed with tweezers for testing. After cleaning, the sliding block 13 can be pulled back to its initial position to prepare for the next use.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An endoscopic biopsy sampling device, characterized in that, include: The outer tube (1) is long and thin, and a sampling port (101) is provided on the side wall near the front end of the outer tube (1). The sampling box body (2) is fixedly connected to the tail end of the outer tube (1). The top of the sampling box body (2) is open and a sampling chamber (201) is formed inside. The handle (3) is installed on the side of the sampling box body (2) away from the outer tube (1); The cutting tube (4) is hollow inside and is rotatably and coaxially fitted inside the outer tube (1). The front end of the cutting tube (4) is provided with a cutting blade (5). A drive adjustment assembly is installed inside the handle (3) and connected to the tail end of the cutting tube (4) for driving the cutting tube (4) to move and rotate inside the outer tube (1); A negative pressure component (6) is installed inside the handle (3) and communicates with the outer tube (1) for drawing tissue samples through the sampling port (101); An angle pre-adjustment locking component is installed between the sampling box body (2) and the handle (3) to adjust and lock the rotation angle of the sampling box body (2) and the outer tube (1) relative to the handle (3).

2. The endoscopic biopsy sampling device according to claim 1, characterized in that, The outer tube (1) and the cutting tube (4) are made of medical stainless steel, titanium alloy or hard engineering plastic. The outer wall of the outer tube (1) is provided with distance scale lines (7) distributed at intervals along its length.

3. The endoscopic biopsy sampling device according to claim 1, characterized in that, The top opening of the sampling box (2) is provided with slots (8) on both sides. The top of the sampling box (2) is provided with a transparent cover plate (9). The bottom of the transparent cover plate (9) is provided with a strip (10) that cooperates with the slots (8). The cutting tube (4) passes through the sampling box (2) and extends into the handle (3).

4. The endoscopic biopsy sampling device according to claim 1, characterized in that, The drive adjustment assembly includes a drive motor (11), a sealing ring (12), and a sliding block (13). The sealing ring (12) is fixedly disposed inside the handle (3), dividing the inside of the handle (3) into a negative pressure chamber (14) and an installation chamber (15). The negative pressure component (6) is disposed in the negative pressure chamber (14), and the drive motor (11) is disposed in the installation chamber (15). Its output shaft is connected to the cutting tube (4). The installation chamber (15) is also provided with a power supply (16), which is electrically connected to the drive motor (11) and the negative pressure component (6).

5. The endoscopic biopsy sampling device according to claim 4, characterized in that, The outer wall of the handle (3) is provided with a sliding groove (17) along its length direction. The cross section of the sliding block (13) is inverted T-shaped. The top of the vertical section of the sliding block (13) is fixedly connected to the bottom of the drive motor (11) and passes through the sliding groove (17). The horizontal section of the sliding block (13) extends to the outside of the handle (3).

6. The endoscopic biopsy sampling device according to claim 5, characterized in that, The outer wall of the handle (3) is provided with anti-slip textures (18) spaced apart. The outer wall of the handle (3) is also provided with a control switch (19). The control switch (19) is electrically connected to the negative pressure component (6). The tail end of the handle (3) is provided with a charging interface for charging the power supply (16).

7. The endoscopic biopsy sampling device according to claim 1, characterized in that, The angle pre-adjustment locking assembly includes a mounting ring (20), a locking ball (21), a return spring (22), a sliding ring (23), and a mounting hook plate (24). The mounting ring (20) is fixedly connected to the tail end of the sampling box body (2). The outer periphery of the mounting ring (20) is provided with multiple annularly distributed mounting grooves (25). The locking ball (21) is movably disposed in the mounting groove (25) and part of the ball is exposed in the mounting groove (25). The return spring (22) is disposed at the bottom of the mounting groove (25) and its top end abuts against the locking ball (21).

8. The endoscopic biopsy sampling device according to claim 7, characterized in that, The sliding ring (23) is slidably sleeved on one end of the handle (3) near the sampling box (2). The inner wall of the sliding ring (23) is provided with an embedding groove (26) that cooperates with the locking ball (21). The outer wall of the handle (3) is symmetrically provided with an arc-shaped docking groove (27). The mounting hook plate (24) is made of plastic and has an L-shaped cross section. The horizontal section of the mounting hook plate (24) is symmetrically fixed to the side of the mounting ring (20) near the handle (3). The vertical section of the mounting hook plate (24) is inserted into the arc-shaped docking groove (27).

9. The endoscopic biopsy sampling device according to claim 8, characterized in that, The sliding ring (23) has an insertion groove (28) at one end near the handle (3). The front end of the handle (3) is inserted into the insertion groove (28). The inner top wall of the insertion groove (28) has multiple annularly distributed limiting protrusions (29). The outer wall of the front end of the handle (3) has an annularly distributed limiting groove (30). The limiting protrusions (29) cooperate with the limiting groove (30). The outer wall of the sliding ring (23) has annularly distributed angle scale lines (31).

Images