A breast biopsy needle

Abstract

The present invention relates to the technical field of medical devices, and discloses a breast excision biopsy needle, comprising an excision needle body, the tail end of the excision needle body is connected to a tissue collector, the front end of the excision needle body is connected to a needle tube assembly, the tissue collector is connected to a negative pressure tube; the needle tube assembly comprises an inner needle tube and an outer needle tube, the inner needle tube is arranged inside the outer needle tube and a gap is left between the inner needle tube and the outer needle tube; the tail end of the inner needle tube passes through the excision needle body and is connected to the tissue collector, and a through groove and a blocking block are arranged at the front edge of the inner needle tube; a cleaning assembly is connected to the tissue collector and the needle tube assembly, and a second branch pipe for conveying cleaning liquid of the cleaning assembly is connected to an anesthetic injection joint through a branch three-way valve. The breast biopsy needle of the present invention is provided with an intermittent, spiral blocking block behind the through groove of the inner needle tube to prevent debris tissue from blocking the gap between the inner needle tube and the outer needle tube, and at the same time, the bleeding site can be flushed through the cleaning assembly to ensure the clarity of ultrasonic imaging.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a breast rotary biopsy needle. Background Art

[0002] Breast disease is a common gynecological disease. It is very important to make a clear diagnosis and treat the disease in time, especially for cancerous lumps. If diagnosed and treated in time, the cure rate is very high. At present, the most commonly used method for the diagnosis and treatment of breast diseases is puncture. The nature of the breast disease can be determined through puncture, which provides a basis for subsequent targeted treatment. Puncture is usually performed using a breast biopsy needle, but the breast biopsy needles currently used on the market have the following problems when used: First, human tissue debris will clog the needle tube during the sampling process, resulting in an irregular shape of the cut tissue, which may make it impossible to sample in severe cases; second, bleeding may occur when sampling the breast, and the diffusion of blood will cause unclear ultrasound imaging and inconvenience in timely inspection of the sample tissue; third, there are individual differences among patients, and sometimes the anesthesia is not thorough enough during the sampling process, causing pain to the patient during sampling. Summary of the invention

[0003] The invention provides a breast rotary excision biopsy needle, which solves the problem of inconvenience in use of existing breast biopsy needles.

[0004] A breast biopsy needle comprises a biopsy needle body, the tail end of the biopsy needle body is connected to a tissue collector, the front end of the biopsy needle body is connected to a needle tube assembly, and the tissue collector is connected to a negative pressure tube;

[0005] The needle tube assembly comprises an inner needle tube and an outer needle tube, wherein the inner needle tube is arranged inside the outer needle tube and a gap is left between the inner needle tube and the outer needle tube; the tail end of the inner needle tube passes through the rotary cutting needle body and is connected to the tissue collector, a through groove and a blocking block are arranged at the front edge of the inner needle tube, and the through groove is located at the front end of the blocking block; the tail end of the outer needle tube is connected to the rotary cutting needle body, and a puncture head is arranged at the front end of the outer needle tube;

[0006] The tissue collector and the needle tube assembly are connected with a cleaning assembly.

[0007] Furthermore, a liquid injection hole is provided on the outer needle tube, and the liquid injection hole is connected with the gap between the inner needle tube and the outer needle tube.

[0008] Furthermore, the above-mentioned cleaning component includes a cleaning liquid delivery main pipe, a cleaning liquid reservoir and a power pump, and the power pump is connected between the cleaning liquid delivery main pipe and the cleaning liquid reservoir; one end of the cleaning liquid delivery main pipe is connected to a main three-way valve, and is connected to a first cleaning liquid delivery branch pipe and a second cleaning liquid delivery branch pipe through the main three-way valve, the first cleaning liquid delivery branch pipe is connected to the tissue collector, and the second cleaning liquid delivery branch pipe is connected to the injection hole.

[0009] Furthermore, a connecting sleeve is provided at the injection hole, a one-way valve is connected via the connecting sleeve, and the one-way valve is connected to a second branch pipe for conveying the cleaning liquid.

[0010] Furthermore, the second cleaning liquid delivery branch pipe is connected to an anesthetic injection joint through a branch three-way valve.

[0011] Furthermore, a sampling hole is provided on the outer needle tube near the puncture head, and the front end cutting edge of the inner needle tube is located in the sampling hole.

[0012] Furthermore, the front end cutting edge of the inner needle tube is an inclined surface, and the angle between the inclined surface and the central axis of the inner needle tube is no more than 30°.

[0013] Furthermore, the end of the negative pressure tube is connected to an adjustable suction pump via a clamping joint, and a vacuum gauge is provided on the clamping joint.

[0014] Furthermore, the head of the puncture head is in the shape of a spike, and its shape includes a cone and a pyramid.

[0015] The present invention has the following beneficial effects:

[0016] (1) The breast biopsy needle of the present invention is provided with an intermittent, spiral blocking block behind the through groove of the inner needle tube, which can push the debris tissue toward the front end of the inner needle tube to prevent the debris tissue from blocking the gap between the inner needle tube and the outer needle tube, thereby ensuring a stable air pressure circuit.

[0017] (2) The breast biopsy needle of the present invention is provided with a cleaning component, which can be used to flush the bleeding site when the patient is undergoing biopsy sampling, thereby ensuring the clarity of ultrasonic imaging. In addition, the cleaning liquid injected through the injection hole can flush away the tissue debris remaining in the gap between the inner needle tube and the outer needle tube. In addition, the tissue collector can also be flushed through the flushing component, which facilitates the timely flushing and inspection of the sampled samples.

[0018] (3) The breast biopsy needle of the present invention is provided with an anesthetic injection joint on the second branch tube for conveying the cleaning fluid, through which the anesthetic can be injected into the patient for a second time, thereby reducing the patient's pain.

[0019] (4) The various components of the breast biopsy needle of the present invention cooperate with each other, and the overall structure is simplified without affecting the function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the rotary biopsy needle according to an embodiment of the present invention;

[0021] Figure 2 It is an axial cross-sectional schematic diagram of the needle tube assembly and part of the second branch tube for conveying cleaning liquid in an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0023] Figure 4 Schematic diagram of the arrangement of the blocking blocks in an embodiment of the present invention.

[0024] In the figure: 1-the body of the rotary cutting needle; 2-the tissue collector; 3-the needle tube assembly; 31-the inner needle tube; 310-the through groove; 311-the blocking block; 32-the outer needle tube; 320-the injection hole; 321-the connecting sleeve; 322-the one-way valve; 323-the sampling hole; 324-the puncture head; 41-the main pipe for cleaning liquid delivery; 42-the main three-way valve; 43-the first branch pipe for cleaning liquid delivery; 44-the second branch pipe for cleaning liquid delivery; 45-the branch three-way valve; 46-the anesthetic injection connector; 5-the negative pressure tube. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] refer to Figures 1 to 4 The present invention provides a breast excision biopsy needle, comprising an excision needle body 1, a tissue collector 2 connected to the tail end of the excision needle body 1, a needle tube assembly 3 connected to the front end of the excision needle body 1, and the tissue collector 2 is connected to a negative pressure tube 5. The excision needle body 1 is an existing device, which is convenient for medical staff to operate by hand, and the tissue collector 2 is used to collect the lesion tissue excised by the biopsy needle.

[0027] The needle tube assembly 3 includes an inner needle tube 31 and an outer needle tube 32 . The inner needle tube 31 is arranged inside the outer needle tube 32 with a gap between the inner needle tube 31 and the outer needle tube 32 .

[0028] The tail end of the inner needle tube 31 passes through the rotary cutting needle body 1 and is connected to the tissue collector 2. The front end of the inner needle tube 31 is provided with a sharp cutting edge for rotary cutting of the lesion tissue. Preferably, the front end cutting edge of the inner needle tube 31 is set as an inclined surface, and the angle between the inclined surface and the central axis of the inner needle tube 31 is not greater than 30 degrees, so as to reduce the resistance of the inner needle tube 31 when rotary cutting human tissue.

[0029] The tail end of the outer needle tube 32 is connected to the rotary cutting needle body 1, and a puncture head 324 is provided at the front end of the outer needle tube 32; the head of the puncture head 324 is in the shape of a spike, and its shape is conical or pyramidal, which reduces the resistance of the outer needle tube 32 to penetrate into human tissue.

[0030] A sampling hole 323 is provided on the outer needle tube 32 near the puncture head 324, and the front end cutting edge of the inner needle tube 31 is located in the sampling hole 323. The cutting edge of the inner needle tube 31 contacts the human lesion tissue and rotates, providing convenience for the cutting edge of the inner needle tube 31 to cut the human tissue.

[0031] The end of the negative pressure tube 5 is connected to an adjustable suction pump through a clamping joint, and the adjustable suction pump can sequentially form negative pressure in the tissue collector 2 and the inner needle tube 31 through the negative pressure tube 5. Among them, the clamping joint is preferably a Luer joint. Of course, a vacuum gauge can also be set on the clamping joint or the negative pressure tube 5 to grasp the strength of adsorption in real time.

[0032] A long through groove 310 is provided at the front end edge of the inner needle tube 31. Since the air pressure outside the outer needle tube 32 is the standard atmospheric pressure, after the inner needle tube 31 cuts the tissue forward and adsorbs it through the negative pressure tube 5, a stable air pressure circuit is formed between the outer needle tube 32, the through groove 310, the inner needle tube 31 and the negative pressure tube 5, which sucks the cut tissue backward into the tissue collector 2.

[0033] Human tissue is elastic. When the rotary biopsy needle is used for rotary sampling, some human tissue may be inserted into the through groove 310 and block the gap between the inner needle tube 31 and the outer needle tube 32. This phenomenon hinders the inner needle tube 31 from moving forward and affects the collection of the lesion tissue after rotary cutting. Therefore, a blocking block 311 is provided on the inner needle tube 31, which is distributed along its circumference. The blocking block 311 is located at the rear side of the through groove 310, and the blocking block 311 is spiral-shaped. There are gaps between each blocking block 311, so it will not affect the normal air pressure circuit; and the set blocking block 311 will push the tissue debris between the inner needle tube 31 and the outer needle tube 32 forward as the inner needle tube 31 rotates and moves forward, and accumulates at the front end of the inner needle tube 31, and is sucked out by the negative pressure.

[0034] The outer needle tube 32 is provided with an injection hole 320, which is connected to the gap between the inner needle tube 31 and the outer needle tube 32. The cleaning component can be connected through the injection hole 320 to flush the rotary cutting sampling site to avoid unclear ultrasonic imaging due to bleeding; the tissue collector 2 is also connected to the cleaning component for flushing after sampling.

[0035] Specifically, the cleaning component includes a cleaning liquid delivery main pipe 41, a cleaning liquid reservoir and a power pump. The power pump is connected between the cleaning liquid delivery main pipe 41 and the cleaning liquid reservoir, and is used to pump the cleaning liquid in the cleaning liquid reservoir to the cleaning liquid delivery main pipe 41 and then to the sampling point of the cutting edge of the inner needle tube 31.

[0036] One end of the cleaning liquid delivery main pipe 41 is connected to the power pump, and the other end is connected to the main three-way valve 42. The main three-way valve 42 is connected to the first cleaning liquid delivery branch pipe 43 and the second cleaning liquid delivery branch pipe 44; the first cleaning liquid delivery branch pipe 43 is connected to the tissue collector 2, and after sampling, the tissue collector 2 is flushed, which is convenient for medical staff to immediately check whether the sampled tissue is qualified; the second cleaning liquid delivery branch pipe 44 is connected to the injection hole 320 to flush the rotary cutting sampling point. On the one hand, the debris tissue accumulated at the front end of the inner needle tube 31 can be flushed forward so that it can be sucked away by negative pressure at the front end of the inner needle tube 31 to avoid blockage of the inner needle tube 31. On the other hand, if bleeding occurs during the rotary cutting process of the inner needle tube 31, it can also be flushed in time to avoid blood diffusion and unclear ultrasonic imaging.

[0037] Preferably, a connecting sleeve 321 is provided at the injection hole 320, and a one-way valve 322 is connected through the connecting sleeve 321. The one-way valve 322 is connected to the second branch pipe 44 for conveying cleaning liquid to prevent waste liquid generated during the biopsy process from flowing out through the injection hole 320 and contaminating the second branch pipe 44 for conveying cleaning liquid.

[0038] In addition, a branch three-way valve 45 is connected to the second branch pipe 44 for conveying the cleaning liquid, and an anesthetic injection joint 46 is connected through the branch three-way valve 45, and an anesthetic syringe is connected through the anesthetic injection joint 46. When a biopsy is performed on a patient, if the patient feels pain, anesthetic can be injected for a second time through the anesthetic injection joint 46, and the anesthetic passes through the injection hole 320, the gap between the inner needle tube 31 and the outer needle tube 32, and the sampling hole 323 in sequence to act on human tissues to relieve the patient's pain.

[0039] The cleaning solution used in this embodiment is physiological saline.

[0040] The above description is only a preferred embodiment of the present invention, which does not represent all possible forms of the present invention, and the protection scope of the present invention is not limited to such special statements and embodiments. According to the technical enlightenment disclosed by the present invention, various other modifications and improvements that do not deviate from the essence of the present invention are made, and these modifications and improvements are still within the protection scope of the present invention.

Claims

1. A breast biopsy needle, comprising a biopsy needle body (1), characterized in that: The rear end of the rotary cutting needle body (1) is connected to a tissue collector (2), the front end of the rotary cutting needle body (1) is connected to a needle tube assembly (3), and the tissue collector (2) is in communication with a negative pressure tube (5); The needle tube assembly (3) comprises an inner needle tube (31) and an outer needle tube (32); the inner needle tube (31) is arranged inside the outer needle tube (32) and a gap is left between the inner needle tube (31) and the outer needle tube (32); the tail end of the inner needle tube (31) passes through the rotary cutting needle body (1) and is connected to the tissue collector (2); a through groove (310) and a blocking block (311) are arranged at the front edge of the inner needle tube (31); the through groove (310) is located at the front end of the blocking block (311); the tail end of the outer needle tube (32) is connected to the rotary cutting needle body (1), and a puncture head (324) is arranged at the front end of the outer needle tube (32); The tissue collector (2) and the needle tube assembly (3) are connected with a cleaning assembly; A stable air pressure circuit is formed between the outer needle tube (32), the through groove (310), the inner needle tube (31) and the negative pressure tube (5), so that the cut tissue is sucked backwards into the tissue collector (2). The blocking blocks (311) are spiral-shaped, and gaps are left between the blocking blocks (311). The set blocking blocks (311) will push the tissue debris between the inner needle tube (31) and the outer needle tube (32) forward as the inner needle tube (31) rotates and moves forward, and the tissue debris is accumulated at the front end of the inner needle tube (31) and is sucked out by the negative pressure.

2. The breast biopsy needle according to claim 1, characterized in that: The outer needle tube (32) is provided with a liquid injection hole (320), and the liquid injection hole (320) is connected to the gap between the inner needle tube (31) and the outer needle tube (32).

3. The breast biopsy needle according to claim 2, characterized in that: The cleaning assembly comprises a cleaning liquid delivery main pipe (41), a cleaning liquid storage tank and a power pump, wherein the power pump is connected between the cleaning liquid delivery main pipe (41) and the cleaning liquid storage tank; one end of the cleaning liquid delivery main pipe (41) is connected to a main line three-way valve (42), and is connected to a first cleaning liquid delivery branch pipe (43) and a second cleaning liquid delivery branch pipe (44) through the main line three-way valve (42); the first cleaning liquid delivery branch pipe (43) is connected to a tissue collector (2), and the second cleaning liquid delivery branch pipe (44) is connected to a liquid injection hole (320).

4. The breast biopsy needle according to claim 3, characterized in that: The injection hole (320) is provided with a connecting sleeve (321), a one-way valve (322) is connected via the connecting sleeve (321), and the one-way valve (322) is connected to the second cleaning liquid delivery branch pipe (44).

5. The breast biopsy needle according to claim 3, characterized in that: The second cleaning liquid delivery branch pipe (44) is connected to an anesthetic injection connector (46) via a branch three-way valve (45).

6. The breast biopsy needle according to claim 1, characterized in that: A sampling hole (323) is provided on the outer needle tube (32) at a position close to the puncture head (324), and the front end edge of the inner needle tube (31) is located in the sampling hole (323).

7. The breast biopsy needle according to claim 1, characterized in that: The front end edge of the inner needle tube (31) is an inclined surface, and the angle between the inclined surface and the central axis of the inner needle tube (31) is no greater than 30°.

8. The breast biopsy needle according to claim 1, characterized in that: The end of the negative pressure tube (5) is connected to an adjustable suction pump via a clamping joint, and a vacuum gauge is provided on the clamping joint.

9. The breast rotational biopsy needle according to any one of claims 1 to 8, characterized in that: The head of the puncture head (324) is in the shape of a spike, and its shape includes a cone and a pyramid.

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