A steering biopsy forceps

Abstract

The utility model discloses a kind of steering biopsy forceps, including handle, the hose part being connected in handle and one end extending out handle, and the mouth being set at the end of hose part;Handle includes handle, and push handle is slidably connected in handle, push handle end is connected with hose part, and push push handle is used to control mouth opening and closing;The middle part of handle is equipped with connecting bearing, connecting bearing is equipped with gear, gear is located in the inside of handle, gear both sides are engaged with left rack and right rack, right rack one side is fixed with knob, left rack below is equipped with left wire, right rack below is equipped with right wire, left wire passes through hose part and is fixed on the left side of mouth upper end, right wire passes through hose part and is fixed on the right side of mouth upper end, knob is moved to drive left rack and right rack to move, to pull left wire and right wire drive mouth to rotate left or right.The utility model is simple in structure, steering is flexible, control is accurate, convenient to operate, and have real-time monitoring function.

Description

Technical Field

[0001] This utility model belongs to the field of biopsy forceps technology, specifically relating to a directional biopsy forceps. Background Technology

[0002] Biopsy forceps are minimally invasive surgical tools commonly used in the medical field, primarily for obtaining tissue samples for pathological analysis. Most existing biopsy forceps employ a linear drive mechanism, controlling the opening and closing of the jaws via a push-pull handle to grasp tissue. However, in some complex surgical scenarios, such as biopsies of the digestive tract, respiratory tract, urinary tract, or blood vessels, surgeons need to adjust the gripping angle of the biopsy forceps to accurately obtain the target tissue. In such cases, traditional linear biopsy forceps, limited by a fixed operating direction, struggle to adapt to the needs of sampling curved or multi-angled tissues, leading to a lower biopsy success rate and increasing surgical trauma for the patient and operational difficulty for the surgeon.

[0003] To address this issue, some improved biopsy forceps have incorporated steering capabilities, such as using cable structures or multi-segment flexible shaft structures, allowing the jaws to bend within a certain range. However, these improvements present the following problems: (1) their complex structures can easily lead to operational jamming or unstable control, affecting surgical precision; (2) some solutions require external power assistance, such as motor drive or pneumatic control, increasing equipment costs and maintenance difficulty; (3) most existing steering mechanisms rely on cable pulling, but due to the nonlinear deformation characteristics of the cable, operational feedback is delayed, making it difficult to accurately control the direction of the jaws, especially when operating in narrow areas, where inaccuracy is likely.

[0004] Furthermore, the handle design of traditional biopsy forceps is usually quite simple, requiring doctors to frequently adjust their hand gestures to achieve the optimal angle during operation. This not only increases operator fatigue but may also affect the accuracy of sampling. Additionally, existing biopsy forceps lack real-time monitoring capabilities, preventing doctors from directly observing the angle and position of the forceps and necessitating endoscopic imaging for further assessment, which further complicates the procedure. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a steerable biopsy forceps that features a simple structure, flexible steering, precise control, and convenient operation. It also incorporates real-time monitoring capabilities, making it of significant clinical importance in improving biopsy success rates, reducing patient trauma, and optimizing the physician's experience.

[0006] The technical solution provided by this utility model is as follows:

[0007] A steerable biopsy forceps includes a handle, a flexible tube portion connected to the handle and extending out of the handle at one end, and a jaw disposed at the end of the flexible tube portion.

[0008] The pliers handle includes a grip and a push handle slidably connected within the grip. The end of the push handle is connected to a flexible tube, and pushing the push handle is used to control the opening and closing of the jaws.

[0009] A connecting bearing is located in the middle of the handle, and a gear is mounted on the connecting bearing. The gear is located inside the handle, and a left rack and a right rack mesh on both sides of the gear. A knob is fixed to one side of the right rack. A left-turn cable is located below the left rack, and a right-turn cable is located below the right rack. The left-turn cable passes through the flexible tube and is fixed to the upper left side of the jaws, while the right-turn cable passes through the flexible tube and is fixed to the upper right side of the jaws. Moving the knob moves the left and right racks, thereby pulling the left and right turn cables and causing the jaws to rotate to the left or right.

[0010] In some embodiments, the left rack is fixed to the left rack connecting rod, which is slidably disposed in the left limiting groove, and the right rack is fixed to the dial, which is slidably disposed in the right limiting groove.

[0011] In some embodiments, the hose portion includes an inner hose fixed to the end of the push handle and an outer hose fixed to the end of the grip handle, the inner hose extending downward into the outer hose, and a gap for relative movement being provided between the inner hose and the outer hose.

[0012] In some embodiments, the push handle includes a push handle end, a push handle connecting rod, and a push handle connecting tube arranged sequentially from top to bottom, with the end of the push handle connecting tube connected to the inner flexible tube.

[0013] In some embodiments, the handle has a through hole for accommodating a spring, the upper end of the through hole has a step to form an upper limit stop, a spring stop is provided at the upper limit stop and connected to one end of the spring, and the lower end of the through hole has a step to form a lower limit stop and connected to the other end of the spring.

[0014] In some embodiments, the jaws include a push rod, a connecting rod, and two clamps. The push rod is axially connected to the bottom end of the inner hose, and the two ends of the connecting rod are axially connected to the push rod and the upper end of the clamps, respectively. The middle part of the clamps is axially connected to the tail end of the outer hose through a connecting bolt. The inner hose drives the push rod to move up and down, thereby opening and closing the two clamps.

[0015] In some implementations, the opposing surfaces of the two pliers are flat or alligator tooth surfaces.

[0016] In some implementations, a bend sensor and a position sensor are provided inside the lower end of the push handle, and a signal interface is provided on the grip. The signal connection line connecting the sensors is connected to the signal interface through the inner hole of the push handle connecting tube via an inner flexible tube.

[0017] In summary, the beneficial effects of this utility model are as follows:

[0018] (1) This utility model has a simple structure, flexible steering, precise control, convenient operation, and real-time monitoring function, which is of great clinical significance for improving the success rate of biopsy, reducing patient damage, and optimizing the doctor's operating experience.

[0019] (2) This utility model can adjust the left and right angles of the jaws by controlling the left and right turning lines with a dial, adapting to the biopsy needs of complex lesion sites, especially suitable for tissue sampling of curved cavities such as the digestive tract and bronchi. At the same time, the use of gear and left and right rack structures ensures accurate and stable turning action, overcomes the lag of traditional cable structures, and improves the accuracy of doctors' operation.

[0020] (3) This utility model integrates a bending sensor and a position sensor inside the push handle, which can monitor the angle change of the jaws and the displacement status of the push handle in real time, and transmit the information to the signal interface through the signal connection line, so that doctors can grasp the real-time operation information. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the present invention.

[0022] Figure 2 This is a schematic diagram of the biopsy forceps in the tightened state.

[0023] Figure 3 This is a schematic diagram of the biopsy forceps in the open state.

[0024] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 5 for Figure 1 Enlarged view at point B in the middle;

[0026] Figure 6 for Figure 3 Enlarged view of point C.

[0027] The attached figures are labeled as follows:

[0028] 1. Handle; 2. Flexible hose section; 3. Jaw;

[0029] 11. Push handle; 12. Toggle switch; 13. Grip; 14. Connecting bearing; 15. Left rack; 16. Left rack connecting rod; 17. Right rack; 18. Gear; 21. Outer flexible hose; 22. Left turn cable; 23. Right turn cable; 24. Inner flexible hose; 25. Spring; 31. Push rod; 32. Connecting bolt; 33. Linkage rod; 34. Pliers; 41. Signal interface; 42. Signal cable; 43. Position sensor; 44. Bending sensor;

[0030] 111. Push handle end; 112. Push handle connecting rod; 113. Push handle connecting tube; 114. Spring stop; 131. Left limit groove; 132. Right limit groove; 133. Upper limit stop; 134. Lower limit stop. Detailed Implementation

[0031] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0032] Please refer to Figure 1-6 A directional biopsy forceps includes a handle 1, a flexible tube 2 connected to the handle 1 and extending out of the handle 1 at one end, and a jaw 3 disposed at the end of the flexible tube 2.

[0033] The pliers handle 1 includes a grip 13 and a push handle 11 slidably connected in the grip 13. The end of the push handle 11 is connected to the hose part 2. Pushing the push handle 11 is used to control the opening and closing of the jaws 3.

[0034] A connecting bearing 14 is provided in the middle of the handle 13, and a gear 18 is provided on the connecting bearing 14. The gear 18 is located inside the handle 13. A left rack 15 and a right rack 17 are meshed on both sides of the gear 18. A knob 12 is fixed on one side of the right rack 17. A left turn cable 22 is provided below the left rack 15, and a right turn cable 23 is provided below the right rack 17. The left turn cable 22 passes through the flexible hose 2 and is fixed to the upper left side of the jaw 3. The right turn cable 23 passes through the flexible hose 2 and is fixed to the upper right side of the jaw 3. Moving the knob 12 moves the left rack 15 and the right rack 17, thereby pulling the left turn cable 22 and the right turn cable 23 to rotate the jaw 3 to the left or right.

[0035] When in use, the doctor pushes or pulls the push handle 11, which opens and closes the jaws 3 to grasp tissue. At the same time, the doctor can turn the knob 12 to drive the rack through the gear mechanism, which in turn pulls the left turn line 22 or the right turn line 23, so that the jaws 3 can rotate to the left or right, so as to make precise sampling in narrow or curved tissue areas.

[0036] To ensure stability, the left rack 15 is fixed to the left rack connecting rod 16, which is slidably positioned in the left limiting groove 131. The right rack 17 is fixed to the dial 12, which is slidably positioned in the right limiting groove 132. This ensures the stable range of movement of the rack during steering and prevents excessive displacement or loss of control.

[0037] In one embodiment, the flexible tube portion 2 includes an inner flexible tube 24 fixed to the end of the push handle 11 and an outer flexible tube 21 fixed to the end of the grip 13. The inner flexible tube 24 extends downward into the interior of the outer flexible tube 21, with a certain clearance between them to allow the inner flexible tube 24 to slide relative to the outer flexible tube 21. The push handle is composed of a push handle end 111, a push handle connecting rod 112, and a push handle connecting tube 113 connected in sequence, wherein the end of the push handle connecting tube 113 is connected to the inner flexible tube 24. When the push handle 11 is pushed forward, the inner flexible tube 24 moves forward accordingly, causing the jaws 3 to close; when the push handle 11 is pulled back, the inner flexible tube 24 moves back, and the jaws open, thereby completing the biopsy operation.

[0038] The jaws consist of a push rod 31, a connecting rod 33, and two clamps 34. The push rod 31 is axially connected to the bottom end of the inner hose 24. The two ends of the connecting rod 33 are respectively connected to the upper ends of the push rod 31 and the clamps 34. The middle part of the clamps 34 is axially connected to the tail end of the outer hose 21 through a connecting bolt 32, so that the up and down movement of the push rod 31 can drive the clamps 34 to open and close.

[0039] Depending on the specific application requirements, the clamping surface of jaw 3 can be designed as either a flat surface or a serrated surface. The flat surface is suitable for gripping soft tissues, while the serrated surface is suitable for gripping harder or slippery tissues, such as blood vessel walls or tendons.

[0040] In a preferred embodiment, the handle 13 has a through hole for accommodating the spring 25. The upper end of the through hole has a step to form an upper limit stop 133. A spring stop 114 is provided at the upper limit stop 133 and connected to one end of the spring 25. The lower end of the through hole has a step to form a lower limit stop 134 and is connected to the other end of the spring 25.

[0041] The upper limit stop 133 and lower limit stop 134 of the handle 13 restrict the spring stop 114 and the spring 25 within a certain area. The push handle 11 can be pushed downward by the push handle end 111 to compress the spring 25. After the push is completed, the push rod 31 can return to the initial position by the elastic force of the spring itself.

[0042] As another further optimized implementation, a bending sensor 44 and a position sensor 43 are provided in the lower end of the push handle 11, and a signal interface 41 is provided on the grip 13. The signal connection line 42 connecting the sensor is connected to the signal interface 41 through the inner flexible tube 24 and the inner hole of the push handle connecting tube 113.

[0043] In practical applications, the curvature sensor 44 monitors the angle change of the jaws 3, and the position sensor 43 monitors the movement of the push handle 11. These signals are transmitted to external devices via the signal connection line 42, allowing doctors to view the operational information in real time. This intelligent feedback system effectively improves surgical precision and reduces the risk of operational errors, enabling doctors to more accurately locate lesions and increase the biopsy success rate.

[0044] The working principle of this utility model:

[0045] The biopsy forceps are connected to the corresponding navigation and display device via a signal interface. They are inserted into the human body through a pre-set artificial channel or natural cavity, and the position and angle information are fed back by the built-in sensor. The forceps are then adjusted to adjust the angle and position of entry, so as to accurately reach the target lesion and clamp it.

[0046] The steering function is as follows: When the biopsy forceps encounter a bifurcation when entering an artificial or natural cavity, the steering function is used. The internal position sensor 43 displays the position information in real time to select the correct channel. By pushing the dial 12 upwards, the right rack 17 moves upwards, tightening the right-turn cable 23 connected to it. As the right rack 17 moves upwards, the gear 18 rotates counterclockwise, causing the left rack 15 to move downwards. The left-turn cable 22 connected to the left rack 15 is released, keeping both the right and left turn cables 23 and 22 taut. The tightened right turn cable 23 pulls on the jaw 3 at the head end, causing the inner and outer tubing 21 and jaw 3 to tilt to the right. The tilting angle increases with the distance the dial 12 moves and decreases with the distance it moves. The curvature sensor 44 monitors the bending angle of the jaw 3 in real time, ensuring smooth entry into the pre-set channel. Similarly, to turn left, the forceps are pushed downwards. To turn the lever 13 upwards or downwards, simply rotate the lever 13 axially by 90° to change it from left-right to up-down. Similarly, to tilt the inner and outer hoses 21 and jaws 3 to other angles, simply control the distance the lever 12 moves up or down.

[0047] Clamping function: When the jaws 3 of the biopsy forceps reach the target position, the push handle 11 is pushed forward, which in turn drives the push handle 11 connecting rod 33 and the inner tube 24 and the push rod 31 fixed at the head of the inner tube 24 to move forward. The spring 25 stop on the push handle 11 connecting tube also presses the spring 25 forward. The lower limit stop supports the deformation stress of the spring 25. The two connecting rods 33 and the two serrated pliers form a four-bar linkage. Through the principle of the four-bar linkage, the linear motion of the push rod 31 at the tail end is converted into the clamping action (rotational motion) of the head pliers 34 to grasp the object, so that the jaws 3 open until the push handle 11 is blocked by the upper end of the handle 13. At this time, the opening angle of the jaws 3 is the maximum angle. The opening angle of the jaws 3 can increase as the push handle 11 is pushed forward and decrease as the distance is reduced. When the jaws 3 need to grip the target, simply release the push handle 11 that is pushed forward at the rear end. The push handle 11 drives the inner hose 24 and the push rod 31 to return to the upper limit stop 133 position by the stress of the spring 25 compression. The jaws 3 can then automatically close and grip the tissue.

[0048] It should be noted that implementations not shown or described in the accompanying drawings or the main text of the specification are all forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the elements and methods described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments.

[0049] It should also be noted that this document may provide examples of parameters containing specific values, but these parameters need not be exactly equal to the corresponding values, but can approximate the corresponding values ​​within acceptable error tolerances or design constraints. Directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this application.

[0050] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A directional biopsy forceps, characterized in that, It includes a pliers handle (1), a flexible tube (2) connected to the pliers handle (1) and extending out of the pliers handle (1) at one end, and a jaw (3) provided at the end of the flexible tube (2). The clamp handle (1) includes a grip (13) and a push handle (11) slidably connected in the grip (13). The end of the push handle (11) is connected to the hose portion (2). Pushing the push handle (11) is used to control the opening and closing of the jaws (3). The handle (13) is provided with a connecting bearing (14) in the middle, and a gear (18) is provided on the connecting bearing (14). The gear (18) is located inside the handle (13). A left rack (15) and a right rack (17) are meshed on both sides of the gear (18). A knob (12) is fixed on one side of the right rack (17). A left turn line (22) is provided below the left rack (15), and a right turn line (23) is provided below the right rack (17). The left turn line (22) passes through the hose part (2) and is fixed to the upper left side of the jaw (3). The right turn line (23) passes through the hose part (2) and is fixed to the upper right side of the jaw (3). Turning the knob (12) moves the left rack (15) and the right rack (17), thereby pulling the left turn line (22) and the right turn line (23) to rotate the jaw (3) to the left or right.

2. The directional biopsy forceps according to claim 1, characterized in that, The left rack (15) is fixed on the left rack connecting rod (16), and the left rack connecting rod (16) is slidably disposed in the left limiting groove (131). The right rack (17) is fixed on the dial (12), and the dial (12) is slidably disposed in the right limiting groove (132).

3. The directional biopsy forceps according to claim 2, characterized in that, The hose portion (2) includes an inner hose (24) fixed to the end of the push handle (11) and an outer hose (21) fixed to the end of the grip (13). The inner hose (24) extends downward into the outer hose (21), and there is a gap between the inner hose (24) and the outer hose (21) for relative movement.

4. The directional biopsy forceps according to claim 3, characterized in that, The push handle (11) includes a push handle end (111), a push handle connecting rod (112), and a push handle connecting tube (113) arranged sequentially from top to bottom. The end of the push handle connecting tube (113) is connected to the inner hose (24).

5. The directional biopsy forceps according to claim 4, characterized in that, The handle (13) has a through hole for accommodating the spring (25). The upper end of the through hole has a step to form an upper limit stop (133). A spring stop (114) is provided at the upper limit stop (133) and is connected to one end of the spring (25). The lower end of the through hole has a step to form a lower limit stop (134) and is connected to the other end of the spring (25).

6. The directional biopsy forceps according to claim 3, characterized in that, The jaws (3) include a push rod (31), a connecting rod (33), and two clamps (34). The push rod (31) is axially connected to the bottom end of the inner hose (24). The two ends of the connecting rod (33) are respectively axially connected to the push rod (31) and the upper end of the clamps (34). The middle part of the clamps (34) is axially connected to the tail end of the outer hose (21) through a connecting bolt (32). The inner hose (24) drives the push rod (31) to move up and down, thereby opening and closing the two clamps (34).

7. The directional biopsy forceps according to claim 6, characterized in that, The opposing surfaces of the two pliers (34) are either flat or alligator tooth surfaces.

8. The directional biopsy forceps according to claim 6, characterized in that, The lower end of the push handle (11) is provided with a bending sensor (44) and a position sensor (43). The handle (13) is provided with a signal interface (41). The signal connection line (42) connecting the sensor is connected to the signal interface (41) through the inner hose (24) and the inner hole of the push handle connecting pipe (113).

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