Breast biopsy device

Abstract

The utility model discloses a mammary gland biopsy device, belongs to the technical field of medical instruments, and aims to solve the technical problem that in the prior art, a mammary gland biopsy device lacks a corresponding structure, so that other operations are difficult to carry out on a biopsy part after sampling is completed. The biopsy device comprises a biopsy device body and a guide sleeve assembly detachably connected with the biopsy device body. The biopsy device body comprises a shell, a motor, a power transmission assembly, a needle body assembly and a sample collection bin; the guide sleeve assembly is arranged on the outer side of the needle body assembly in a sleeving mode. The needle body assembly comprises an inner needle tube and an outer needle body which are sequentially sleeved from inside to outside; one end of the outer needle body is provided with a puncture part, and the other end extends into the shell and is fixed; a sampling window is arranged on one side, close to the puncture part, of the outer needle body; and the inner needle tube is used for sampling at the sampling window. The mammary gland biopsy device can be better used for diagnosis and treatment work of mammary gland diseases, and is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a breast biopsy device. Background Art

[0002] Breast diseases are common gynecological diseases. It is very important to make a clear diagnosis and treat the diseases in time. Especially for cancerous masses, if diagnosed and treated in time, the cure success rate is very high. At present, the most commonly used method for the diagnosis and treatment of breast diseases is puncture biopsy. Through puncture, the nature of breast diseases can be determined, providing a basis for subsequent targeted treatment.

[0003] Current breast biopsy devices generally include a needle body structure, a transmission structure, and a sample collection chamber. The transmission structure drives the needle body structure to penetrate into the target position under the guidance of, such as ultrasound, MRI, PEM, etc., and cuts an appropriate amount of tissue, which is collected into the sample collection chamber. Some biopsy devices can be operated by a user with one hand and inserted once to obtain one or more biopsy samples. In addition, some biopsy devices cooperate with a vacuum module or a control module for the connection of, such as fluids (e.g., pressurized air, physiological saline, atmospheric air, vacuum, etc.), power, or command communication.

[0004] Currently, it is also desired to be able to locate the position of the biopsy site during the biopsy process, or, after the biopsy is completed, to be able to provide further operations on the biopsy site, such as marking the biopsy site, injecting drugs into the biopsy site, or inserting other instruments (e.g., endoscope), etc. Therefore, further improvements to the breast biopsy device are still needed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a breast biopsy device to solve the technical problem that in the prior art, due to the lack of corresponding structures in the breast biopsy device, it is difficult to perform other operations on the biopsy site after sampling.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A breast biopsy device provided by the utility model includes a biopsy device body and a guiding cannula assembly detachably connected to the biopsy device body;

[0008] The biopsy device body includes a housing, a motor, a power transmission assembly, a needle body assembly, and a sample collection chamber; the guiding cannula assembly is sleeved outside the needle body assembly;

[0009] The needle body assembly includes an inner needle tube and an outer needle body which are sleeved from the inside out in sequence; one end of the outer needle body is provided with a puncture part, and the other end extends into the housing and is fixed; a sampling window is arranged on one side of the outer needle body close to the puncture part; the inner needle tube samples at the sampling window.

[0010] By means of the biopsy device body and the guiding cannula assembly which are detachably arranged, after the biopsy is completed, the biopsy device body can be withdrawn, and then the biopsy site can be marked, injected with drugs or implanted with medical devices such as an endoscope through the guiding cannula assembly, so that the condition of the biopsy site after cutting can be known more conveniently and accurately, and targeted treatment means such as hemostasis can be provided, further reducing the pain of the patient.

[0011] Optionally or preferably, a blade part is formed at one end of the inner needle tube close to the sampling window, and the other end extends into the housing and is connected with the power transmission assembly;

[0012] One end of the inner needle tube close to the housing is also communicated with a vacuum pipeline; the vacuum pipeline is used for collecting the cut tissue into the sample collection bin.

[0013] The biopsy site is sampled by the blade part, and the cut tissue is extracted into the sample collection bin through the vacuum pipeline.

[0014] Optionally or preferably, one end of the outer needle body close to the housing is communicated with a fluid injection pipeline; the fluid injection pipeline is communicated with the sampling window.

[0015] An opening is arranged at one end of the outer needle body close to the housing, and the opening is communicated with the fluid injection pipeline. An operator can inject normal saline into the biopsy position through the fluid injection pipeline to wash and fill the biopsy position to make it clearer under ultrasound. In addition, an anesthetic can also be injected into the puncture position through the fluid injection pipeline for secondary anesthesia. Or, air can also be introduced into the biopsy position through the fluid injection pipeline to cooperate with the vacuum so that the cut tissue can be more smoothly extracted into the sample collection chamber.

[0016] Optionally or preferably, the guiding cannula assembly includes a guiding cannula and a connecting part; a conical part is formed at the front end of the guiding cannula;

[0017] A plurality of elastic pieces are arranged at the front end of the housing, and the plurality of elastic pieces are circumferentially arranged and protrude outward along the circumferential surface of the housing; the connecting part is clamped with the elastic pieces.

[0018] Optionally or preferably, the connecting part includes a clamping collar;

[0019] A plurality of clamping structures are arranged on the inner surface of the clamping collar, and the plurality of clamping structures are circumferentially arranged;

[0020] The clamping structure includes a first through portion, a locking portion, and a second through portion;

[0021] The first through portion includes a first straight groove axially penetrating through the clamping collar and a first slope connected to the first straight groove;

[0022] The second through portion includes a second straight groove axially penetrating through the clamping collar and a second slope connected to the second straight groove;

[0023] The orientations of the first slope and the second slope correspond to the protruding direction of the elastic piece.

[0024] Optionally or preferably, the locking portion includes a blind groove axially partially cut off along the clamping collar and a third slope connected to the blind groove;

[0025] The third slope corresponds to the protruding direction of the elastic piece.

[0026] Optionally or preferably, the connecting portion further includes a sealing collar; the sealing collar includes a front locking ring, a sealing ring, and a rear locking ring;

[0027] The sealing ring includes an inner ring and an outer ring opposite to each other. The inner ring of the sealing ring is conical and protrudes outward; a plurality of through holes are annularly and arrayedly arranged on the outer ring of the sealing ring;

[0028] A plurality of convex columns are annularly and arrayedly arranged on one side of the front locking ring. A plurality of blind holes are annularly and arrayedly arranged on the side of the rear locking ring close to the front locking ring; the plurality of convex columns respectively pass through the plurality of through holes on the outer ring of the sealing ring and are inserted into the plurality of blind holes on the front locking ring;

[0029] Two connecting holes are provided on the side of the rear locking ring close to the clamping collar; two connecting columns are provided on the side of the clamping collar close to the rear locking ring; the two connecting columns are respectively inserted into the two connecting holes.

[0030] Optionally or preferably, the power transmission assembly includes a gear set, a reciprocating lead screw, and a nut; the reciprocating lead screw is threadedly connected to the nut, and the reciprocating lead screw is fixedly sleeved on the inner needle tube;

[0031] The gear set includes a driving gear connected to the output shaft of the motor and a driven gear meshing with the driving gear;

[0032] The driven gear is fixedly sleeved on the reciprocating lead screw; a plurality of limiting mechanisms are arranged in the housing, and the plurality of limiting mechanisms are respectively used for limiting the driven gear and the nut.

[0033] The power of the motor is transmitted to the reciprocating lead screw through the driving gear and the driven gear. While the reciprocating lead screw rotates, it moves back and forth axially due to the restriction of the nut, thereby driving the inner needle tube to perform a rotary reciprocating motion. The inner needle tube rotates forward, cuts off the tissue to be examined, and collects it into the sample collection bin through the vacuum pipeline.

[0034] Based on the above technical solution, the utility model can at least produce the following technical effects:

[0035] The breast biopsy device provided by the utility model realizes that after the biopsy is completed, the biopsy device main body is withdrawn through the separated biopsy device main body and the guiding cannula assembly, and then the biopsy site is marked, drugs are injected or medical devices such as an endoscope are placed through the guiding cannula assembly, which can more conveniently and accurately obtain the situation of the biopsy site after cutting and provide targeted treatment means such as hemostasis, further reducing the pain of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is the overall structural schematic diagram of the breast biopsy device of the utility model;

[0037] Figure 2 is the cross-sectional schematic diagram of the breast biopsy device of the utility model;

[0038] Figure 3 is the exploded view of the guiding cannula assembly in the breast biopsy device of the utility model;

[0039] Figure 4 is the structural schematic diagram of the clamping collar in the breast biopsy device of the utility model.

[0040] In the figure: 10, biopsy device main body; 11, outer shell; 111, elastic piece; 12, motor; 20, guiding cannula assembly; 21, guiding cannula; 22, connecting part; 221, clamping collar; 2211, connecting column; 222, front locking ring; 223, sealing ring; 224, rear locking ring; 31, inner needle tube; 32, outer needle body; 321, puncture part; 322, sampling window; 40, vacuum pipeline; 50, fluid injection pipeline; 60, clamping structure; 61, first through part; 611, straight groove one; 612, slope one; 62, locking part; 621, blind groove; 622, slope three; 63, second through part; 631, straight groove two; 632, slope two; 71, reciprocating lead screw; 72, nut; 73, driving gear; 74, driven gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0042] Embodiment

[0043] In this embodiment, the front end and the rear end refer to: relative to the operator of the breast biopsy device, the end farther from the operator is the front end, and the end closer to the operator is the rear (last) end.

[0044] Please refer to Figures 1 to 4 , a breast biopsy device, including a biopsy device body 10 and a guiding cannula assembly 20 detachably connected to the biopsy device body 10.

[0045] Specifically, the biopsy device body 10 includes a housing 11, a motor 12 and a power transmission assembly respectively arranged in the housing 11, a needle assembly connected to the front end of the housing 11, and a sample collection bin (not shown in the figure) connected to the rear end of the housing 11; wherein the motor 12 transmits the cutting power to the needle assembly through the power transmission assembly, and the needle assembly cuts the tissue to be examined and sends it to the sample collection bin through a vacuum pipeline 40.

[0046] In this embodiment, the needle assembly includes an inner needle tube 31 and an outer needle body 32 sleeved from the inside to the outside in sequence. The front end of the outer needle body 32 is provided with a puncture part 321, and the rear end of the outer needle body 32 extends into the housing 11 and is fixed to the sealing structure; a sampling window 322 is arranged on the outer needle body 32 near the puncture part 321, and the inner needle tube 31 samples through the sampling window 322.

[0047] A cutting edge is formed at the front end of the inner needle tube 31, and the rear end thereof extends into the housing 11 and is connected to the power transmission assembly. The inner needle tube 31 can perform reciprocating rotational motion along the axial direction under the action of the power transmission assembly; a vacuum pipeline 40 is also communicated with the rear end part of the inner needle tube 31, and the cut tissue is collected into the sample collection bin through the vacuum pipeline 40.

[0048] In this embodiment, the guiding cannula assembly 20 includes a guiding cannula 21 and a connecting part 22. The guiding cannula 21 is through from front to back, and its front end is formed with a conical part, and the middle part is cylindrical; the guiding cannula 21 is detachably / separably connected to the housing 11 through the connecting part 22.

[0049] Specifically, two elastic pieces 111 are arranged on the circumferential surface at the front end of the outer shell 11. The elastic pieces 111 are specifically arranged at the middle position in the axial direction at the front end of the outer shell 11. Without external force, the elastic pieces 111 protrude outward along the circumferential direction of the outer shell 11.

[0050] The above-mentioned connecting part 22 includes a clamping collar 221 and a sealing collar; two clamping structures 60 are correspondingly arranged on the inner surface along the circumferential direction of the clamping collar 221; each clamping structure 60 includes a first through part 61, a locking part 62 and a second through part 63.

[0051] The first through part 61 includes a first straight groove 611 axially penetrating through the clamping collar 221 and a first slope 612 connected to the first straight groove 611; the second through part 63 includes a second straight groove 631 axially penetrating through the clamping collar 221 and a second slope 632 connected to the second straight groove 631; the orientations of the first slope 612 and the second slope 632 correspond to the protruding direction of the elastic piece 111.

[0052] The locking part 62 includes a blind groove 621 axially partially cut off along the clamping collar 221 and a third slope 622 connected to the blind groove 621; the third slope 622 corresponds to the protruding direction of the elastic piece 111.

[0053] The above-mentioned sealing collar includes a front locking ring 222, a sealing ring 223 and a rear locking ring 224; the sealing ring 223 includes an inner ring and an outer ring opposite to each other. The inner ring of the sealing ring 223 is conical and protrudes outward; a plurality of through holes are arranged in a circular array on the outer ring of the sealing ring 223; a plurality of convex columns are arranged in a circular array on one side of the front locking ring 222, and a plurality of blind holes are arranged in a circular array on the side of the rear locking ring 224 close to the front locking ring 222; the plurality of convex columns respectively pass through the plurality of through holes on the outer ring of the sealing ring 223 and are inserted into the plurality of blind holes on the front locking ring 222.

[0054] In addition, two connecting holes are arranged on the side of the rear locking ring 224 close to the clamping collar 221; two connecting columns 2211 are arranged on the side of the clamping collar 221 close to the rear locking ring 224; the two connecting columns 2211 are respectively inserted into the two connecting holes, thereby fixing the clamping collar 221 and the sealing collar together.

[0055] In this embodiment, the motor 12 and the power transmission assembly are fixed in the outer shell 11. The power transmission assembly includes a gear set, a reciprocating lead screw 71 and a nut 72; the reciprocating lead screw 71 is threadedly connected to the nut 72, and the reciprocating lead screw 71 is fixedly sleeved on the inner needle tube 31, so as to drive the inner needle tube 31 to move.

[0056] The above-mentioned gear set includes a driving gear 73 connected to the output shaft of the motor 12 (through a coupling) and a driven gear 74 meshed with the driving gear 73.

[0057] In this embodiment, the driven gear 74 is fixedly sleeved on the reciprocating lead screw 71, and a limiting mechanism is arranged inside the housing 11. The driven gear 74 is axially restricted within this limiting mechanism.

[0058] The nut 72 is clamped within another limiting mechanism inside the housing 11. Since the reciprocating lead screw 71 is threadedly connected to the nut 72, and the reciprocating lead screw 71 is sleeved on the inner needle tube 31 and fixed to the inner needle tube 31, the power of the motor 12 can be transmitted to the reciprocating lead screw 71 through the driving gear 73 and the driven gear 74. While the reciprocating lead screw 71 rotates, due to the restriction of the nut 72, it moves back and forth axially, thereby driving the inner needle tube 31 to perform a rotational reciprocating motion. The inner needle tube 31 rotates forward, cuts off the tissue to be examined, and collects it into the sample collection chamber through the vacuum pipeline 40.

[0059] In addition, in this embodiment, an opening is provided at the rear end of the outer needle body 32, and this opening is communicated with the fluid injection pipeline 50. The operator can inject normal saline into the biopsy position through the fluid injection pipeline 50 to wash and fill the biopsy position to make it clearer under ultrasound. Additionally, anesthetic can be injected into the puncture position through the fluid injection pipeline 50 for secondary anesthesia. Or, air can also be introduced into the biopsy position through the fluid injection pipeline 50 to cooperate with the vacuum, so that the cut tissue can be more smoothly extracted into the sample collection chamber.

[0060] The working process of a breast biopsy device provided by the present utility model is as follows:

[0061] Before using this breast biopsy device, the doctor can decide whether to use the guiding cannula assembly 20 according to the need; if not, the connecting part 22 can be rotated to remove the guiding cannula 21; if used, after the biopsy is completed, the connecting part 22 is rotated to remove the breast biopsy device main body 10 (including the housing 11, the motor 12, the power transmission structure, the inner needle tube 31, the outer needle body 32, and the sample collection chamber) from the guiding cannula 21, and the guiding cannula 21 is left in the body. During the extraction process, the tissue or blood attached to the surface of the outer needle body 32 is scraped off by the conical sealing ring 223 to avoid contamination caused by body fluid leakage. Since the guiding cannula 21 is through, an endoscope can be inserted through the guiding cannula 21 to observe the cutting condition of the cutting part (for example, whether the cutting is complete, whether the wound is neat, the amount of bleeding, etc.), a marker can also be inserted to mark the biopsy position, or drugs can be injected into the biopsy position through the guiding cannula 21.

[0062] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A breast biopsy device, characterized in that: It comprises a biopsy device body (10) and a guide sleeve assembly (20) detachably connected to the biopsy device body (10); The biopsy device body (10) comprises a housing (11), a motor (12), a power transmission assembly, a needle assembly and a sample collection chamber; the guide sleeve assembly (20) is sleeved on the outside of the needle assembly; The needle assembly comprises an inner needle tube (31) and an outer needle body (32) which are sequentially sleeved from the inside to the outside; one end of the outer needle body (32) is provided with a puncture portion (321), and the other end extends into the outer shell (11) and is fixed; a sampling window (322) is provided on one side of the outer needle body (32) close to the puncture portion (321); the inner needle tube (31) performs sampling at the sampling window (322).

2. The breast biopsy device according to claim 1, characterized in that: The inner needle tube (31) has a blade formed on one end close to the sampling window (322), and the other end extends into the outer shell (11) and is connected to the power transmission component; One end of the inner needle tube (31) close to the outer shell (11) is also connected to a vacuum pipeline (40); the vacuum pipeline (40) is used to collect the cut tissue into a sample collection chamber.

3. The breast biopsy device according to claim 1, characterized in that: One end of the outer needle body (32) close to the outer shell (11) is connected to a fluid injection pipeline (50); the fluid injection pipeline (50) is connected to the sampling window (322).

4. The breast biopsy device according to claim 1, characterized in that: The guide sleeve assembly (20) comprises a guide sleeve (21) and a connecting portion (22); a tapered portion is formed at the front end of the guide sleeve (21); A plurality of spring sheets (111) are provided at the front end of the housing (11); the plurality of spring sheets (111) are arranged in a circumferential direction and protrude outwardly along the circumference of the housing (11); and the connecting portion (22) is snap-connected with the spring sheets (111).

5. The breast biopsy device according to claim 4, characterized in that: The connecting portion (22) comprises a snap-fit ​​ring (221); The inner surface of the clamping ring (221) is provided with a plurality of clamping structures (60), and the plurality of clamping structures (60) are arranged in a circumferential direction; The clamping structure (60) comprises a first through portion (61), a locking portion (62) and a second through portion (63); The first through-portion (61) comprises a linear groove (611) axially extending through the clamping ring (221) and a slope (612) connected to the linear groove (611); The second through-portion (63) comprises a second straight groove (631) axially extending through the clamping ring (221) and a second slope (632) connected to the second straight groove (631); The orientations of the first slope (612) and the second slope (632) correspond to the protruding directions of the elastic sheet (111).

6. The breast biopsy device according to claim 5, characterized in that: The locking portion (62) comprises a blind groove (621) cut off along the axial portion of the clamping ring (221) and a slope three (622) connected to the blind groove (621); The slope three (622) corresponds to the protruding direction of the spring sheet (111).

7. The breast biopsy device according to claim 6, characterized in that: The connecting portion (22) further comprises a sealing collar, wherein the sealing collar comprises a front locking ring (222), a sealing ring (223) and a rear locking ring (224); The sealing ring (223) comprises an inner ring and an outer ring which are opposite to each other, the inner ring of the sealing ring (223) being conical and protruding outwards; a plurality of through holes are arranged in an annular array on the outer ring of the sealing ring (223); A plurality of convex columns are arranged in an annular array on one side of the front locking ring (222), and a plurality of blind holes are arranged in an annular array on one side of the rear locking ring (224) close to the front locking ring (222); the plurality of convex columns respectively pass through the plurality of through holes on the outer ring of the sealing ring (223) and are plugged into the plurality of blind holes on the front locking ring (222); Two connection holes are provided on one side of the rear locking ring (224) close to the snap ring (221); two connection posts (2211) are provided on one side of the snap ring (221) close to the rear locking ring (224); and the two connection posts (2211) are respectively plugged into the two connection holes.

8. The breast biopsy device according to claim 1, characterized in that: The power transmission assembly comprises a gear set, a reciprocating screw (71) and a nut (72); the reciprocating screw (71) is threadedly connected to the nut (72), and the reciprocating screw (71) is fixedly sleeved on the inner needle tube (31); The gear set comprises a driving gear (73) connected to the output shaft of the motor (12) and a driven gear (74) meshing with the driving gear (73); The driven gear (74) is fixedly sleeved on the reciprocating screw rod (71); a plurality of limiting mechanisms are arranged in the housing (11), and the plurality of limiting mechanisms are respectively used to limit the driven gear (74) and the nut (72).

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