Abdominal wall fat rotary cutting biopsy device

Abstract

The invention relates to the technical field of medical instruments, in particular to an abdominal wall fat rotary cutting biopsy device. The abdominal wall fat rotary cutting biopsy device comprises a handle, the far end of the handle is connected with a puncture tube, and the far end of the puncture tube is provided with a sampling notch; a rotary cutting tube is arranged in the puncture tube and can move back and forth along the puncture tube; and a negative pressure suction device is arranged at the near end of the rotary cutting pipe. The abdominal wall fat rotary cutting biopsy tool aims at solving the technical problems that in the prior art, the false negative of abdominal wall fat biopsy is high, and large sample sampling abdominal wall fat rotary cutting biopsy tools are lacked in the market.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to an abdominal wall fat rotary cutting biopsy device. Background Art

[0002] The abdominal wall fat biopsy device is a medical device specially used for abdominal wall fat tissue biopsy. It combines the functions of rotary cutting technology and biopsy sampling, and can obtain abdominal wall fat tissue samples more accurately and effectively for subsequent pathological analysis and diagnosis.

[0003] At present, there are abdominal wall fat biopsy needles in China, which are syringe-like, with relatively thin needle tips and low sampling efficiency. Due to the small amount of tissue sampled, the false negative rate of diagnosis is high. At present, some centers use blades to cut fat tissue, which lacks effective tools. At the same time, blade cutting is prone to bleeding and injury risks, and skin sutures are required after surgery, which increases time costs.

[0004] The Chinese utility model patent with announcement number CN220158302U disclosed a biopsy needle and a biopsy device on December 12, 2023. The biopsy needle includes an outer knife tube and an inner knife tube sleeved inside the outer knife tube. The front end of the outer knife tube has a puncture head, and the side wall of the outer knife tube has a cutting window extending along its axial direction and communicating with its interior. The inner knife tube can rotate around the axis of the inner knife tube, and the knife head of the inner knife tube is provided with a cutting edge extending along the axial direction of the inner knife, and the cutting edge is serrated. The utility model provides a cutting edge extending along the axial direction of the inner knife tube on the knife head of the inner knife tube, and exposes the cutting edge of the inner knife tube at the cutting window of the outer knife tube, so that the inner knife tube can be rotated relative to the outer knife tube to remove tissue. However, the puncture head of the device cannot be retracted during the sampling process, and the sharp part of the head is too long and easy to puncture other tissues.

[0005] It is necessary to invent an abdominal wall fat rotary cutting biopsy device that can increase the sampling volume and improve the inspection efficiency. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an abdominal wall fat rotary biopsy device, which is intended to solve the technical problem of a large amount of sampling of abdominal wall fat rotary biopsy devices that are not available in the prior art.

[0007] To achieve the above-mentioned purpose, the present invention proposes an abdominal wall fat rotary cutting biopsy device, comprising a handle, the distal end of the handle is connected to a puncture tube, the distal end of the puncture tube is provided with a sampling notch; a rotary cutting tube is provided inside the puncture tube, and the rotary cutting tube can move back and forth along the puncture tube; a negative pressure suction device is provided at the proximal end of the rotary cutting tube.

[0008] Preferably, the distal end of the puncture tube is a triangular cut end, the opening of the sampling notch is 2-2.5 cm, and the diameter of the puncture tube is 3-7 mm.

[0009] Preferably, a peeling mechanism is provided in the handle, and the peeling mechanism includes a motor fixed on the outer shell of the handle, a screw arranged on the motor, a slider arranged on the screw, a small gear arranged on the screw and a large gear meshing with the small gear; the large gear drives the peeling tube to rotate, and the sampling slot drives the peeling tube to move in the horizontal direction.

[0010] Preferably, a button is provided on the handle, and the button is used to control the start and stop of the motor.

[0011] Preferably, the negative pressure suction device comprises a syringe and a hose arranged on the syringe, and the hose is rotatably arranged at the proximal end of the rotary cutting tube.

[0012] Preferably, the proximal end of the puncture tube is provided with a tip which can be extended and retracted along the axial direction of the puncture tube.

[0013] Preferably, a baffle is provided at the proximal end of the tip, a clamping strip is provided at the distal end of the rotary cutting tube, and a clamping groove is provided on the tube wall at the distal end of the puncture tube, and the clamping strip can enter the clamping groove.

[0014] Preferably, a notch is provided below the proximal end of the baffle for guiding the card strip into the card slot.

[0015] Preferably, the clamping strip comprises a horizontal section and a bent section, the bent section and the horizontal section are connected via an elastic section, and the bent section can be clamped into the clamping slot.

[0016] Preferably, the tube wall at the distal end of the notch is bent toward the proximal end and the center, and the tube wall at the proximal end of the notch is bent toward the distal end and the center, and arc chamfers are provided at the bending places. Compared with the prior art, the beneficial effects of the abdominal wall fat rotary cutting biopsy device provided by the present invention are: The relative diameter of the incision is about 5mm, which can obtain more fat tissue. The double-slot design is used for forward rotary cutting and backward sampling, and the head end is set with an oblique cutter to improve sampling efficiency and reduce the risk of bleeding. At the same time, the incision size is smaller than that of ordinary blades, and no suture is required after sampling.

[0017] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an abdominal wall fat rotary cutting biopsy device according to an embodiment of the present invention, in which the rotary cutting tube has not entered the sampling notch.

[0019] Figure 2 It is a structural schematic diagram of a rotary cutting tube portion of an abdominal wall fat rotary cutting biopsy device according to an embodiment of the present invention entering into a sampling notch.

[0020] Figure 3 It is a structural schematic diagram of an abdominal wall fat rotary cutting biopsy device according to an embodiment of the present invention, in which the rotary cutting tube is completely inserted into the sampling notch.

[0021] Figure 4 It is a structural schematic diagram of a handle of an abdominal wall fat rotary cutting biopsy device according to an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure when the rotary cutting tube enters the farthest end.

[0023] Figure 6 It is a schematic diagram of the structure of the rotary cut tube before it enters the notch position.

[0024] Figure 7 It is a schematic diagram of the structure of the rotary cut tube cutting organization.

[0025] Figure 8 It is a schematic diagram of the overall structure when the rotary cutting tube enters the farthest end.

[0026] Fig. 9 It is a schematic diagram of the overall structure of the rotary cut tube cutting organization.

[0027] in: 1-handle; 11-button; 2-puncture tube; 21-sampling notch; 22-tip; 221-baffle; 222-notch; 23-slot; 3-peeling tube; 31-strip; 311-horizontal section; 312-bending section; 313-elastic section; 32-red section; 33-yellow section; 4-negative pressure suction device; 41-syringe; 42-hose; 5-peeling mechanism; 51-motor; 52-screw; 53-slider; 54-small gear; 55-large gear DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0029] In the description of the present invention, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0030] In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiments of the present disclosure are now described in detail with reference to the accompanying drawings. As used herein, the term "clinician" refers to a doctor, surgeon, nurse, or any other care provider, and may include auxiliary personnel. The term "proximal end" will refer to the portion of the device or its components that is closer to the clinician, and the term "distal end" will refer to the portion of the device or its components that is farther away from the clinician. Embodiment 1:

[0033] See also Figure 1An embodiment of the present invention provides an abdominal wall fat rotary cutting biopsy device, comprising a handle 1, the distal end of the handle 1 is connected to a puncture tube 2, and the distal end of the puncture tube 2 is provided with a sampling notch 21. A rotary cutting tube 3 is provided in the puncture tube 2, and the rotary cutting tube 3 can move back and forth along the puncture tube 2; a negative pressure suction device 4 is provided at the proximal end of the rotary cutting tube 3. The medical staff holds the handle 1 and inserts the puncture tube 2 to the position of the abdominal wall where sampling is required. The negative pressure suction device 4 is turned on, and the fat to be sampled is sucked into the puncture tube 2 through the sampling notch 21, and then the required fat is cut off by the rotary cutting tube 2, and the negative pressure suction device 4 sucks the sampled fat out through the rotary cutting tube 3.

[0034] See also Figure 3 In an optional embodiment, the distal end of the puncture tube 2 is a triangular cut head, which makes it easier to puncture the abdominal wall and creates a smaller gap. The opening of the sampling gap 21 is 2-2.5 cm, and the fat tissue can be sucked into the puncture tube 2 and then cut off to obtain more fat tissue. The diameter of the puncture tube 2 is 3-7 mm, preferably 5 mm. The puncture tube 2 is small, and no suturing is required after the puncture tube 2 is removed, which improves the sampling efficiency and reduces the risk of bleeding.

[0035] See also Figure 4 In an optional embodiment, a peeling mechanism 5 is provided in the handle 1, and the peeling mechanism 5 includes a motor 51 fixed on the housing of the handle 1, a screw 52 provided on the motor 51, a slider 53 provided on the screw 52, ​​a pinion 54 provided on the screw 52, ​​and a large gear 55 meshing with the pinion 54. The large gear 55 drives the peeling tube 3 to rotate, and the sampling slot 21 drives the peeling tube 3 to move in the horizontal direction. A button 11 is provided on the handle 1, and the button 11 is used to control the start and stop of the motor 51.

[0036] Specifically, when the puncture tube 2 enters the sampling position, the button 11 is pressed, the motor 51 starts to drive the screw 52 to rotate, and the slider 53 starts to move along the distal end. At the same time, the small gear 54 rotates to drive the large gear 55 to rotate. The small gear 54 is fixed on the screw 52, ​​so there will be no relative sliding between the two. The large gear 55 is fixed on the rotary cutting tube 3. When the large gear 55 rotates, the rotary cutting tube 3 also rotates. A bearing is connected to the slider 53, and the bearing can be rotatably fixed on the rotary cutting tube 3. While the rotary cutting tube 3 rotates, it will move toward the proximal end along with the screw 52. The specific movement state is from Figure 1 to Figure 2 Then Figure 3 Since the rotary cutting tube 3 moves toward the proximal end while rotating, the proximal end of the rotary cutting tube 3 is a cutting edge that can cut tissue.

[0037] See also Figure 4In an optional embodiment, the negative pressure suction device 4 includes a syringe 41 and a hose 42 disposed on the syringe 41, and the hose 42 is rotatably disposed at the proximal end of the rotary cutting tube 3. During the rotation of the rotary cutting tube 3, the hose 42 will not rotate together, and will not affect the use of the syringe 41. The length of the hose 42 can also be selected according to actual conditions, so that when the rotary cutting tube 3 moves toward the proximal end, the syringe 41 will not move toward the proximal end, which is convenient for automatic or manual operation.

[0038] Specific use process: Initially, the distal end of the puncture tube 2 is a triangular cut end, and the rotary cutting tube 3 moves to the leftmost end. Figure 3 After the puncture tube 2 enters the tissue position where sampling is required, the rotary cutting tube 3 moves to the right. Figure 4 The negative pressure is turned on, that is, the fat to be sampled is sucked into the puncture tube 2 through the sampling notch 21 by the syringe 41. Then the syringe 41 stops sucking, and the motor 51 is started to drive the rotary cutting tube 2 to move leftward to cut off the required fat. When the rotary cutting tube 2 moves to the leftmost end, the fat tissue can be completely cut off. The syringe 41 is continued to be used to suck out the sampled fat through the rotary cutting tube 3. Embodiment 2:

[0039] See also Figure 5 and Figure 6 Since the front end of the puncture tube 2 is a sharp part, it is easy to injure other tissues when sampling, so this embodiment is provided with a retractable puncture tube tip 22. The tip 22 is retractably arranged along the puncture tube. In this embodiment, the movement of the rotary cutting tube 3 to the distal end and the proximal end is controlled by manual push and pull.

[0040] A baffle 221 is provided at the proximal end of the tip 22. A clamping strip 31 is provided at the distal end of the rotary cutting tube 3, and a clamping groove 23 is provided on the tube wall at the distal end of the puncture tube 2. The clamping strip 31 is divided into a horizontal section 311 and a bending section 312, and the bending section 312 and the horizontal section 311 are connected by an elastic section 313. The bending section 312 can be clamped into the clamping groove 23.

[0041] A notch 222 is provided below the baffle 221 to guide the bent section 312 into the slot 23, wherein the notch 222 is a triangular notch or an arc notch, and the upper edge of the notch 222 is higher than the upper edge of the bent section 312, so that when the bent section 312 moves to the far end and hits the notch 222, it can enter the slot 23. When the bent section 312 is stuck in the slot 23, the tip 22 is fixed and cannot move axially. When the bent section 312 is separated from the slot 23, the tip 22 can move axially along the tip.

[0042] The tube wall at the distal end of the notch 21 is bent toward the proximal end and the center, and the tube wall at the proximal end of the notch 21 is bent toward the distal end and the center, and arc chamfers are provided at the bending places, which will not scratch the blood vessels. The suction port can be trumpet-shaped, which increases the suction force and suction area. On the other hand, whether the puncture tube 2 moves toward the distal end or the proximal end, it will not form a barb shape to affect the puncture.

[0043] The distal end of the puncture tube 2 is provided with an oblique cut, and the tip 22 and the oblique cut present a triangle when at the distal end, which is convenient for puncture. When the tip 22 moves to the distal end, the tip 22 and the oblique cut present a smooth surface, which will not scratch the tissue.

[0044] Specific working process: Step 1: Push the tip 22 to the farthest end, and then move the rotary cutting tube 3 to the far end. When the bent section 312 hits the baffle 221, it will enter the slot 23. At this time, the rotary cutting tube 3 can no longer move to the far end, and the tip 22 is also stuck and cannot move to the near end.

[0045] Step 2: Puncture and insert the puncture tube into the designated position of the abdomen. Move the rotary cutting tube 3 to the far end, and the tip 22 is no longer blocked and can be retracted into the puncture tube 2 after being squeezed. Manually aspirate the syringe at the end to generate negative pressure, suck the fat tissue into the puncture tube 2, and then stop aspiration. Then manually push the rotary cutting tube 3 into Figure 7 Cut the tissue in place.

[0046] Step 3: Continue to use the syringe to suck out the fat tissue, and then withdraw the puncture tube.

[0047] Since the positions where the peeling tube 3 enters in the first step and the second step are different, the proximal end of the peeling tube can be segmented by color, such as a red segment 32 and a yellow segment 33, and the yellow segment 33 is arranged at the proximal end of the red segment 32. When the red segment 32 is about to enter the handle 1, it is the cutting position ( Figure 7 ), the yellow segment 33 is about to enter the handle 1 and is the farthest end of the first step ( Figure 8 ).

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An abdominal wall fat biopsy device, characterized in that: The invention comprises a handle (1), the distal end of the handle (1) is connected to a puncture tube (2), the distal end of the puncture tube (2) is provided with a sampling notch (21); a rotary cutting tube (3) is provided inside the puncture tube (2), the rotary cutting tube (3) is capable of moving back and forth along the puncture tube (2); and a negative pressure suction device (4) is provided at the proximal end of the rotary cutting tube (3).

2. The abdominal wall fat biopsy device according to claim 1, characterized in that: The distal end of the puncture tube (2) is a triangular cut end, the opening of the sampling notch (21) is 2-2.5 cm, and the diameter of the puncture tube (2) is 3-7 mm.

3. The abdominal wall fat biopsy device according to claim 1, characterized in that: The handle (1) is provided with a peeling mechanism (5), the peeling mechanism (5) comprising a motor (51) fixed to a housing of the handle (1), a screw rod (52) arranged on the motor (51), a slider (53) arranged on the screw rod (52), a pinion gear (54) arranged on the screw rod (52), and a large gear (55) meshing with the pinion gear (54); the large gear (55) drives the peeling tube (3) to rotate, and the sampling slot (21) drives the peeling tube (3) to move in a horizontal direction.

4. The abdominal wall fat rotary biopsy device according to claim 3, characterized in that: A button (11) is provided on the handle (1), and the button (11) is used to control the start and stop of the motor (51).

5. The abdominal wall fat biopsy device according to claim 1, characterized in that: The negative pressure suction device (4) comprises a syringe (41) and a hose (42) arranged on the syringe (41); the hose (42) is rotatably arranged at the proximal end of the rotary cutting tube (3).

6. The abdominal wall fat rotary biopsy device according to claim 1, characterized in that: The proximal end of the puncture tube (2) is provided with a tip (22) which can be extended and retracted along the axial direction of the puncture tube (2).

7. The abdominal wall fat rotary biopsy device according to claim 6, characterized in that: A baffle (221) is provided at the proximal end of the tip (22), a clamping strip (31) is provided at the distal end of the rotary cutting tube (3), and a clamping groove (23) is provided on the tube wall at the distal end of the puncture tube (2), and the clamping strip (31) can enter the clamping groove (23).

8. The abdominal wall fat rotary biopsy device according to claim 7, characterized in that: A notch (222) for guiding the clamping strip (31) to enter the clamping slot (23) is provided below the proximal end of the baffle (221).

9. The abdominal wall fat rotary biopsy device according to claim 8, characterized in that: The clamping strip (31) comprises a horizontal section (311) and a bent section (312); the bent section (312) and the horizontal section (311) are connected via an elastic section (313); the bent section (312) can be clamped into the clamping slot (23).

10. The abdominal wall fat rotary biopsy device according to claim 9, characterized in that: The tube wall at the distal end of the notch (21) is bent toward the proximal end and the center, and the tube wall at the proximal end of the notch (21) is bent toward the distal end and the center, and arc chamfers are provided at the bending positions.

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