Uterine cavity tissue cutting biopsy device

Abstract

The invention relates to the technical field of medical instruments, in particular to a uterine cavity tissue cutting biopsy device which comprises an outer tube, an inner tube, an inner tube pushing and rebounding mechanism and a negative pressure collecting mechanism, the inner tube pushing and rebounding mechanism and the negative pressure collecting mechanism are connected with the inner tube, the outer tube is provided with a cutting sampling opening, the inner tube is provided with a cutting head, and the inner tube pushing and rebounding mechanism drives the inner tube to axially move back and forth. The negative pressure sampling device further comprises a rotary rebound mechanism which is nested outside the inner pipe, and the inner pipe pushes the rebound mechanism to drive the inner pipe to axially move back and forth and rotate and rebound at the same time, so that the cutting head is driven to rotate and cut back and forth. According to the uterine cavity tissue cutting biopsy device, an external power source is not needed, heat damage can be thoroughly eliminated, sufficient and effective cutting can be achieved without additional driving force and additional operation during use, the integrity of a cut sample can be kept as far as possible, and the uterine cavity tissue cutting biopsy device has the advantages of being free of heat damage, free of noise, free of vibration, convenient to operate and capable of avoiding inaccurate pathological examination.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a uterine cavity tissue cutting biopsy device. BACKGROUND

[0002] In clinical practice, when treating diseased tissue, it is generally necessary to remove the diseased tissue from the patient's body and perform a biopsy on the diseased tissue.

[0003] For uterine polyps and uterine fibroids in the uterine cavity, if an electrotome is used to remove the occupying lesion in the uterine cavity under hysteroscopy, not only will the tissue on the cutting surface be carbonized, but also the heat generated during cutting will cause thermal damage to the surrounding tissue. Even though this thermal damage is mostly reversible, it will still cause slow postoperative healing and affect pregnancy for a certain period of time. The use of cold knife technology can avoid tissue carbonization and thermal damage, effectively protect the endometrium and basal layer, and thus protect fertility. Therefore, the use of cold knife instead of electrotome to complete the cutting of uterine cavity tissue under hysteroscopy has become a technical trend.

[0004] Currently, when a cold knife is used in clinical practice, there are both active uterine cavity tissue planing and cutting devices and passive, manual uterine cavity tissue planing and cutting devices. The removed tissue will be too fragmented to affect the accuracy of pathological examination, and the heat generated during powered operation will cause thermal damage to the endometrium and muscle, although this damage will be lower than that caused by the use of an electrotome. Therefore, to minimize the damage to normal tissue during the cutting of occupying lesions in the uterine cavity and to make the cut tissue relatively complete, a passive cold knife is the best choice.

[0005] However, a passive cold knife is generally a manual cutting device, which may have the defects of insufficient cutting force, resulting in low tissue cutting efficiency and laboriousness. For example, Chinese Patent: A Tissue Rotary Cutting Biopsy Device (ZL202323624415.X) discloses a cutting biopsy device that can simultaneously cut and collect samples of uterine cavity tissue. The inner tube pushing mechanism of this patent can only drive the inner tube to move axially along the outer tube. This single direction of cutting may have the problem of ineffective or inefficient cutting. To solve this problem, if the cutting knife can rotate while advancing linearly, it can cut at multiple angles. However, if an electric motor is used to drive the cutting knife to rotate, it needs to be connected to a power source, which will generate heat during powered operation and may cause thermal damage to the endometrium and muscle. In addition, it has the defects of large vibration, loud noise, inconvenience of operation, and damage to normal tissue. If there is a manual mechanical structure that can drive the cutting knife to rotate while driving it to advance linearly for cutting, it can completely eliminate thermal damage, greatly increase cutting efficiency, and maintain high integrity of the cut tissue, thus overcoming the above-mentioned defects. SUMMARY

[0006] In view of the defects of the existing uterine tissue cutting biopsy, the present application provides a uterine tissue cutting biopsy device which can completely eliminate heat damage, effectively cut, synchronize cutting and sample collection, and avoid inaccurate pathological examination.

[0007] To achieve the above-mentioned purposes, the present application adopts the following technical solutions: The uterine tissue cutting biopsy device comprises an outer tube, an inner tube sleeved in the outer tube, an inner tube pushing and rebounding mechanism connected with the inner tube, and a negative pressure collection mechanism. One end of the outer tube is provided with a cutting and sampling port, and the end of the inner tube is provided with a cutting head. The inner tube pushing and rebounding mechanism drives the inner tube to move back and forth in the axial direction in the outer tube, so that the cutting head cuts back and forth at the cutting and sampling port to collect the sample to the negative pressure collection mechanism. The device further comprises a rotating rebounding mechanism, which is nested outside the inner tube. When the inner tube pushing and rebounding mechanism drives the inner tube to move back and forth in the axial direction in the outer tube, the rotating rebounding mechanism rotates and rebounds at the same time, and drives the cutting head to cut back and forth. The inner tube moves in the axial direction while rotating, can cut at multiple angles, and increases the effectiveness and sufficiency of cutting.

[0008] As a preferred, the rotating rebounding mechanism comprises a hollow guide seat, a hollow guide column and a first rebounding component. The first rebounding component is sleeved on the guide column. The guide column is provided with a limiting mechanism at one end and a guide head at the other end. The guide seat is provided with an arc-shaped guide groove in the axial direction. When the inner tube moves in the axial direction, the guide column is sleeved in the guide seat, and the guide head moves along the arc-shaped guide groove to drive the inner tube to rotate. The rotating rebounding mechanism relies on the axial movement driven by the inner tube pushing and rebounding mechanism, does not need additional driving force, does not need external power supply, does not need additional operation when used, has the advantages of simple structure, low cost, no noise, no vibration and easy operation.

[0009] As a preferred, the guide groove is symmetrical and has two guide heads. The rotating angle of the guide head along the guide groove reaches 135 degrees. The rotating operation is stable, and the cutting angle is as large as possible.

[0010] As a preferred, the guide seat is a hollow cylindrical shape, is sleeved outside the inner tube, and has an inner diameter smaller than the outer diameter of the first rebounding component. The rebounding of the first rebounding component is ensured.

[0011] As a preferred, the guide seat is provided with a positioning head at the end away from the first rebounding component, and a positioning groove corresponding to the position of the gun body is arranged to cooperate with the positioning head.

[0012] As a preferred, the negative pressure collection mechanism comprises a negative pressure sampling bottle and a negative pressure pipe. The negative pressure pipe is connected to a negative pressure device. The negative pressure sampling bottle is responsible for sampling the cut tissue, and the liquid can flow out along the negative pressure pipe.

[0013] As preferred, the axial interface is provided with a through hole in the middle, a one-way valve is arranged, one end of the axial interface is connected with the fixed sleeve, and the other end of the axial interface is detachably connected with the negative pressure sampling bottle.

[0014] As preferred, the axial interface is provided with a through hole in the middle, a one-way valve is arranged, one end of the axial interface is connected with the fixed sleeve, and the other end of the axial interface is detachably connected with the negative pressure sampling bottle.

[0015] As preferred, the axial interface is provided with a through hole in the middle, a one-way valve is arranged, one end of the axial interface is connected with the fixed sleeve, and the other end of the axial interface is detachably connected with the negative pressure sampling bottle.

[0016] As preferred, the axial interface is provided with a through hole in the middle, a one-way valve is arranged, one end of the axial interface is connected with the fixed sleeve, and the other end of the axial interface is detachably connected with the negative pressure sampling bottle. The uterine cavity tissue cutting biopsy device provided by the application does not need external power supply, can completely eliminate thermal damage, does not need additional driving force and additional operation during use, can fully and effectively cut, can keep the integrity of the cut sample as much as possible, can synchronize cutting and sample collection, and has the advantages of no thermal damage, no noise, no vibration, easy operation and accurate pathological examination. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure schematic diagram of the embodiment of the application.

[0018] Figure 2 The A part of the structure schematic diagram of the embodiment of the application. Figure 1

[0019] Figure 3 The use state diagram of the embodiment of the application.

[0020] Figure 4 The B part of the structure schematic diagram of the embodiment of the application. Figure 3

[0021] Figure 5 ​​For Figure 2 Structure diagram of the guide seat.

[0022] Figure 6 For Figure 2 Structure diagram of the guide column.

[0023] Figure 7 For Figure 1 Enlarged diagram of part C.

[0024] Figure 8 For Figure 1 Enlarged diagram of part D.

[0025] Figure 9 For Figure 1 Enlarged diagram of part E.

[0026] In the figure: 1, outer tube; 2, inner tube; 3, inner tube pushing and rebound mechanism; 4, negative pressure collection mechanism; 5, cutting sampling port; 6, cutting head; 7, rotary rebound mechanism; 8, guide seat; 9, guide column; 10, first rebound component; 11, limiting mechanism; 12, guide head; 13, guide groove; 14, axial interface; 15, one-way valve; 16, fixed sleeve; 17, gun body; 18, pushing handle; 19, pushing piston; 20, second rebound component; 21, spring buckle; 22, positioning head; 23, negative pressure regulator; 25, negative pressure tube; 26, sampling inner container; 27, negative pressure sampling bottle; 29, hinge; 30, handle connecting piece; 31, outer tube group seat; 32, sealing ring. DETAILED DESCRIPTION

[0027] The application will be further described below in conjunction with the specific embodiments. Figure 1 — Figure 9 with the specific embodiments.

[0028] A uterine cavity tissue cutting biopsy device, as shown in the accompanying drawings, comprises an outer tube 1, an inner tube 2 nested in the outer tube 1, an inner tube pushing and rebound mechanism 3 and a negative pressure collection mechanism 4, both connected with the inner tube 2. Figure 1 The outer tube 1 has a cutting sampling port 5 on the side wall of one end, as shown in the accompanying drawings, and the inner tube 2 has a cutting head 6 at the end, as shown in the accompanying drawings. Figure 8 Figure 9 The inner tube pushing and rebound mechanism 3 drives the inner tube 2 to move back and forth axially in the outer tube 1, so that the sample produced by the back-and-forth cutting of the cutting head 6 in the cutting sampling port 5 is collected into the negative pressure collection mechanism 4.

[0029] The rotary rebound mechanism 7 is nested outside the inner tube 2, and rotates and rebounds while the inner tube 2 moves back and forth axially in the outer tube 1 driven by the inner tube pushing and rebound mechanism 3, so as to drive the cutting head 6 to cut back and forth. Figure 2 ​As shown, the rotating rebound mechanism 7 includes a hollow guide seat 8, a hollow guide column 9, and a first rebound component 10. The first rebound component 10 is sleeved on the guide column 9, as shown in the attached Figure 6 As shown, the guide column 9 is provided with a limiting mechanism 11 at one end, and a guide head 12 at the other end, as shown in the attached Figure 5 As shown, the guide seat 8 is provided with an arc-shaped guide slot 13 along the axial direction. When the inner tube 2 moves axially, the guide column 9 is sleeved in the guide seat 8, and the guide head 12 moves along the guide slot 13 to drive the inner tube 2 to rotate. A stainless steel clasp spring is further provided between the limiting mechanism 11 and the first rebound component 10 to further limit and stabilize. The first rebound component 10 uses a spring.

[0030] The guide slot 13 is symmetrical and has two guide heads 12. The guide head 12 rotates along the guide slot 13 by an angle of 135 degrees.

[0031] The guide seat 8 is a hollow cylindrical shape, sleeved on the outer tube 2, and its inner diameter is smaller than the outer diameter of the first rebound component 10.

[0032] As shown in the attached Figure 5 As shown, the guide seat 8 is provided with a positioning head 22 at the end away from the first rebound component 10, which cooperates with the positioning slot provided at the corresponding position of the gun body to be positioned. The negative pressure collection mechanism 4 includes a negative pressure sampling bottle 27 and a negative pressure pipe 25, and the negative pressure pipe 25 is connected to a negative pressure device.

[0033] As shown in the attached Figure 7 As shown, it further includes an axial interface 14, which is provided with a through hole in the middle, and is provided with a one-way valve 15. One end of the axial interface 14 is integrally formed and fixedly connected with a fixed sleeve 16, and the other end of the axial interface 14 is detachably buckled with the negative pressure sampling bottle 27, as shown in the attached Figures 1-4 As shown, the inner tube pushing rebound mechanism 3 includes a gun body 17, a pushing handle 18, a pushing piston 19, a second rebound component 20, a spring buckle 21, and the pushing handle 18 is rotatably connected with the gun body 17 through a hinge 29. One end of the pushing handle 18 is movably connected with a handle connecting piece 30 fixed on the inner tube 2, and pulling the pushing handle 18 can push the inner tube 2 to move axially. The second rebound component 20 is sleeved on the skirt of the pushing piston 19, the spring buckle 21 is detachably buckled on the fixed sleeve 16, the end surface of the spring buckle 21 is a limiting device of the second rebound component 20, the pushing piston 19 is provided with an axial through hole, and is also provided with a one-way valve 15. The inner tube 2 passes through the rotating rebound mechanism 7 into the through hole of the pushing piston 19 and is fixedly connected with the pushing piston 19. When the inner tube 2 moves axially, the pushing piston 19 also moves in the fixed sleeve 16. The one-way valve 15 uses a duckbill valve. The second rebound component 20 uses a spring. The pushing piston 19 is provided with a sealing ring 32 at the end.

[0034] The axial interface 14 is provided with a negative pressure interface at the end of the negative pressure sampling bottle 27, and is connected with the negative pressure tube 25.

[0035] The negative pressure sampling bottle 27 is provided with an independent and removable sampling inner container 26, and the outer wall of the sampling inner container 26 is a percolation outer wall. The opening end of the negative pressure sampling bottle 27 is also provided with a sealing ring 32.

[0036] As shown in the accompanying drawings, the negative pressure sampling bottle 27 is provided with a negative pressure regulator 23. Figure 1 3 As shown in the accompanying drawings, the negative pressure sampling bottle 27 is provided with a negative pressure regulator 23.

[0037] The outer tube 1 is fixed by the outer tube group seat 31 and is provided with a limiting device. When the inner tube 2 moves and rotates by pulling the push handle 18, the outer tube 1 does not move with it. The outer tube group seat 31 is sequentially connected with the guide seat 8, the guide column 9, the push piston 19, the axial interface 14 and the negative pressure sampling bottle 27.

[0038] In use, one end of the outer tube 1 is placed in the body and is attached to the tissue part to be cut off. By pulling the push handle 18, the inner tube 2 will move axially and rotationally forward. As shown in the accompanying drawings, the push handle 18 is released. Due to the elastic force, the inner tube 2 will move axially back. Through the reciprocating movement, the cutting head 6 of the inner tube 2 cuts off the tissue through the cutting sampling port 5 for multiple times and multiple angles. The negative pressure device (not shown in the figure) generates negative pressure, and the cut-off tissue is sucked into the sampling inner container 26 through the inner tube 2. Other liquids can flow out through the negative pressure tube 25. Figure 3 4 As shown in the accompanying drawings, the push handle 18 is released. Due to the elastic force, the inner tube 2 will move axially back. Through the reciprocating movement, the cutting head 6 of the inner tube 2 cuts off the tissue through the cutting sampling port 5 for multiple times and multiple angles. The negative pressure device (not shown in the figure) generates negative pressure, and the cut-off tissue is sucked into the sampling inner container 26 through the inner tube 2. Other liquids can flow out through the negative pressure tube 25.

[0039] The negative pressure device is closed, the negative pressure regulator 23 is adjusted, the negative pressure state is removed, and the negative pressure sampling bottle 27 is removed, and the sampling is successful. When needed, the negative pressure sampling bottle 27 is clamped on the axial interface 14, the negative pressure sampling bottle 27 is sealed and closed, and the negative pressure device is opened to quickly reach the negative pressure state. The whole process does not need to disconnect the negative pressure device, and the sampling is convenient and fast.

[0040] The above only describes the preferred embodiments of the present application, and is not used to limit the implementation range of the present application. Any equivalent changes and modifications made according to the content of the present application should be within the technical scope of the present application.​​

Claims

1. A uterine cavity tissue cutting biopsy device, comprising an outer tube (1), an inner tube (2) sleeved in the outer tube (1), an inner tube pushing and rebounding mechanism (3) connected with the inner tube (2), and a negative pressure collecting mechanism (4), wherein one end of the outer tube (1) is provided with a cutting and sampling port (5) on the lateral wall, the end of the inner tube (2) is provided with a cutting head (6), the inner tube pushing and rebounding mechanism (3) drives the inner tube (2) to move back and forth in the axial direction in the outer tube (1), so that the sample generated by the cutting head (6) cutting back and forth in the cutting and sampling port (5) is collected to the negative pressure collecting mechanism (4), characterized in that: It also includes a rotating rebound mechanism (7), the rotating rebound mechanism (7) is nested outside the inner tube (2), the inner tube push rebound mechanism (3) drives the inner tube (2) to rotate rebound while moving back and forth in the axial direction in the outer tube (1), drives the cutting head (6) to rotate back and forth cutting. ​ 2. An endometrial tissue cutting biopsy device according to claim 1, wherein: The rotating rebound mechanism (7) includes a hollow guide seat (8), a hollow guide column (9), a first rebound component (10), the first rebound component (10) is sleeved on the guide column (9), one end of the guide column (9) is provided with a limiting mechanism (11), the other end of the guide column (9) is provided with a guide head (12), the guide seat (8) is provided with an arc-shaped guide slot (13) in the axial direction, when the inner tube (2) moves in the axial direction, the guide column (9) is sleeved in the guide seat (8), the guide head (12) moves along the arc-shaped guide slot (13) to drive the inner tube (2) to rotate.

3. An endometrial tissue cutting biopsy device according to claim 2, wherein: The guide slot (13) is symmetrical, the guide head (12) is symmetrical, and the guide head (12) rotates along the guide slot (13) by 135 degrees.

4. An endometrial tissue cutting biopsy device according to claim 2, wherein: The guide seat (8) is a hollow cylindrical shape, which is sleeved outside the inner tube (2), and the inner diameter is smaller than the outer diameter of the first rebound component (10).

5. An endometrial tissue cutting biopsy device according to claim 2, wherein: The guide seat (8) is provided with a positioning head (22) at the end away from the first rebound component (10), and the positioning groove corresponding to the position of the gun body is matched and positioned.

6. The hystereoscopic tissue-cutting biopsy device of claim 1 wherein: The negative pressure collecting mechanism (4) includes a negative pressure sampling bottle (27) and a negative pressure pipe (25), and the negative pressure pipe (25) is connected to a negative pressure device.

7. An endometrial tissue cutting biopsy device according to claim 5, wherein: It also includes an axial interface (14), a one-way valve (15) is arranged in the through hole in the middle of the axial interface (14), one end of the axial interface (14) is connected with a fixed sleeve (16), and the other end of the axial interface (14) is detachably connected with the negative pressure sampling bottle (27), the inner tube push rebound mechanism (3) includes a gun body (17), a push handle (18), a push piston (19), a second rebound component (20) and a spring buckle (21), the push handle (18) is rotatably connected with the gun body (17), one end of the push handle (18) is movably connected with a handle connecting piece (30) fixed on the inner tube (2), the push piston (19) is provided with an axial through hole, the inner tube (2) passes through the rotating rebound mechanism (7) and enters the through hole of the push piston (19) to be fixedly connected with the push piston (19), the second rebound component (20) is sleeved on the skirt of the push piston (19), the spring buckle (21) is detachably connected with the fixed sleeve (16), the end surface of the spring buckle (21) is a limiting device of the second rebound component (20), the push handle (18) is pulled to release, and when the inner tube (2) moves back and forth in the axial direction, the push piston (19) also moves back and forth in the fixed sleeve (16).

8. An endometrial tissue cutting biopsy device according to claim 7, wherein: The axial interface (14) is provided with a negative pressure interface near the negative pressure sampling bottle (27) end.

9. An endometrial tissue cutting biopsy device according to claim 6, wherein: The negative pressure sampling bottle (27) is provided with a sampling inner container (26), and the outer wall of the sampling inner container (26) is a percolation outer wall.

10. The hystereoscopic tissue-cutting biopsy device of claim 6, wherein: The negative pressure sampling bottle (27) is provided with a negative pressure regulator (23).

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