Biopsy needle with annular cutting edge
By designing a biopsy needle with a ring-shaped blade, the problems of difficulty in piercing the skin and insufficient sampling by biopsy needles have been solved, achieving rapid and reliable tissue sampling and reducing patient pain and sampling risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏格里特医疗科技有限公司
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-10
AI Technical Summary
Existing biopsy needles are difficult to pierce the skin smoothly and can only collect a small amount of sample at a time, which increases patient discomfort and sampling risks.
Design a biopsy needle with a ring-shaped cutting edge. The needle core has a puncture bevel at the front end, and the needle sheath has a conical surface at the front end to form a 360° cutting edge, which is used to facilitate puncturing the skin and making omnidirectional cutting and sampling within the tissue.
It reduces the pain and damage of skin punctures, ensures that a sufficient number of tissue samples are obtained quickly, and reduces the need for multiple punctures.
Smart Images
Figure CN224099375U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, in particular, relate to a biopsy needle with annular cutting edge. BACKGROUND
[0002] Biopsy needle is one of the tools commonly used in interventional diagnosis and treatment, and is a kind of medical instrument for biopsy of conical tumor and unknown tumor of kidney, liver, lung, breast, thyroid, prostate, pancreas, testis, uterus, ovary, body surface and other organs, and cell aspiration and other purposes.
[0003] Common biopsy needle is suction biopsy needle, the front end of the biopsy needle is metal needle, the tail end is connected with syringe, the metal needle at the front end is pierced into the tissue after piercing the human skin, and part of the tissue strip enters into the needle, then the tissue strip is separated from the tissue under the action of negative pressure, so that the sampling of the tissue is completed.The needle at the front end of the traditional biopsy needle is usually provided with a beveled tip structure to facilitate piercing the human skin.However, in actual operation, the inventor finds that although the beveled tip structure facilitates piercing the human skin, the sampling of the tissue is not sufficient, because only the tip part of the needle at the front end has a cutting effect on the tissue, and the tissue strip entering into the needle is actually torn and pulled, so that multiple punctures may be required to obtain sufficient tissue samples, which not only increases the pain of the patient, but also increases the sampling risk. SUMMARY
[0004] The technical problem to be solved by the utility model is that in the prior art, the biopsy needle is difficult to smoothly pierce the skin, and the single sampling amount is not large, and based on this, the utility model provides a biopsy needle with annular cutting edge, which can facilitate piercing the skin and also obtain sufficient sampling amount.
[0005] The technical scheme adopted by the utility model to solve the technical problem is that a biopsy needle with annular cutting edge comprises a handle, a needle sleeve and a needle core, the needle sleeve is connected with the handle, the needle sleeve is through at both ends, the needle core is movably inserted into the needle sleeve, the front end of the needle core has a puncture bevel, the puncture bevel can be pierced out of the front end of the needle sleeve, the rear end of the needle sleeve is used for being connected with a suction device, the needle sleeve has an inner sleeve wall and an outer sleeve wall, the front end of the needle sleeve is provided with a conical surface on one of the inner sleeve wall and the outer sleeve wall, the conical surface intersects with the other one of the inner sleeve wall and the outer sleeve wall to form a cutting edge, the cutting edge is a circular structure, and the plane where the cutting edge is located is perpendicular to the central axis of the needle sleeve.
[0006] Further, the taper surface is arranged on the inner sleeve wall, the cutting edge is formed by the intersection of the taper surface and the outer sleeve wall, and the radius of the circular structure formed by the cutting edge is the same as the outer radius of the needle sleeve.
[0007] Further, the taper surface is arranged on the outer sleeve wall, the cutting edge is formed by the intersection of the taper surface and the inner sleeve wall, and the radius of the circular structure formed by the cutting edge is the same as the inner radius of the needle sleeve.
[0008] Further, the front end of the needle core is provided with inclined wedge surfaces on the opposite sides of the puncture inclined surface.
[0009] Further, the biopsy needle with the annular cutting edge further comprises an outer tube fixedly connected to the front end of the handle, the outer tube is a hollow structure, and the needle sleeve penetrates through the outer tube.
[0010] Further, the front end of the handle is fixedly provided with a guide tube, and the guide tube is arranged outside the rear end of the outer tube.
[0011] Further, the rear end of the handle is provided with a connecting piece for connecting with a suction device, the connecting piece is a hollow structure, and the connecting piece is in communication with the needle sleeve.
[0012] The biopsy needle with the annular cutting edge has the advantages that the needle core is first inserted into the human skin, which is beneficial to the smooth puncture of the skin by the needle sleeve, reduces the pain of the patient, avoids the serious damage to the skin, and when the needle sleeve is inserted into the sampled tissue, the 360° cutting edge can cut the tissue strip in 360° when the tissue strip is inserted into the tissue, so that enough tissue strips can be fully and quickly inserted into the needle sleeve, the sampling amount of the tissue strip is ensured, the condition that the enough tissue strips can be obtained through repeated puncture is reduced, the use is reliable, and the biopsy needle with the annular cutting edge is suitable for popularization and use. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model will be further described in connection with the drawings and examples.
[0014] Figure 1 It is the structure schematic diagram of the biopsy needle with the annular cutting edge of the utility model;
[0015] Figure 2 It is Figure 1 It is the local enlarged view of A place in the biopsy needle with the annular cutting edge shown in the figure;
[0016] Figure 3 It is Figure 1 It is the top view of the needle sleeve and needle core connecting structure in the biopsy needle with the annular cutting edge shown in the figure.
[0017] In the figure: 1, handle, 2, needle cover, 201, inner cover wall, 202, outer cover wall, 203, taper, 204, cutting edge, 3, needle core, 31, puncture bevel, 32, wedge surface, 4, outer tube, 5, guide tube, 6, connecting piece. DETAILED DESCRIPTION
[0018] The utility model will be described in detail in combination with the drawings. The figure is a simplified schematic diagram, and only the basic structure of the utility model is schematically shown, so it only shows the structure related to the utility model.
[0019] Please refer to Figures 1-3 The utility model provides a biopsy needle with annular cutting edge, including handle 1, needle cover 2 and needle core 3, needle cover 2 is connected with handle 1, and the both ends of needle cover 2 are through, needle core 3 is solid structure and can be movably inserted into needle cover 2, and the front end of needle core 3 has puncture bevel 31, and puncture bevel 31 can be worn by the front end of needle cover 2, and the rear end opening of needle cover 2 is used to be connected with suction device (for example, injection needle cylinder often used in medical treatment), needle cover 2 has inner cover wall 201 and outer cover wall 202, and the front end of needle cover 2 is located on one of inner cover wall 201 and outer cover wall 202 and is provided with taper 203, and taper 203 intersects with the other of inner cover wall 201 and outer cover wall 202 to form cutting edge 204, and cutting edge 204 is circular structure, and the plane where cutting edge 204 is located is perpendicular to the central axis of needle cover 2.
[0020] The biopsy needle with annular cutting edge of the utility model, when using, medical staff first controls needle core 3 to move from the rear end of handle 1, and makes the puncture bevel 31 on it to stretch out from the front end of needle cover 2, at this time, the front end of needle core 3 is punctured to skin by relying on the action of puncture bevel 31, then, needle cover 2 is moved, and the cutting edge 204 at the front end is passed through skin. When cutting edge 204 punctures skin, medical staff extracts needle core 3 from the rear end of handle 1 to make room for the space in needle cover 2 for sampling, then, cutting edge 204 is moved to the vicinity of the tissue part to be sampled, and cutting edge 204 is made to be inserted into tissue. At this time, the tissue strip enters the inner cavity of needle cover 2 under the cutting action of cutting edge 204, and finally, the suction device is operated again, and the negative pressure is formed in needle cover 2, and the tissue strip is separated from tissue under the action of negative pressure, so when needle cover 2 is extracted from tissue, the tissue strip can be taken out together.
[0021] When the skin is punctured, the needle core 3 first pierces the human skin, which weakens the strength of the puncture site on the human skin, is beneficial to the subsequent needle sleeve 2 to smoothly pierce the skin, reduces the pain of the patient, and also avoids the skin from being seriously damaged. In addition, when the needle sleeve 2 pierces into the tissue to be sampled, since the blade edge 204 is a 360° omnidirectional blade edge, the tissue strip can be cut in 360° when piercing into the tissue, so that enough tissue strips can be fully and quickly entered into the needle sleeve 2, which guarantees the sampling amount of the tissue strips and reduces the situation that enough tissue strips can be obtained only by repeatedly puncturing.
[0022] In the embodiment, the conical surface 203 is arranged on the inner sleeve wall 201, the blade edge 204 is formed at the intersection of the conical surface 203 and the outer sleeve wall 202, and the radius of the circular structure formed by the blade edge 204 is the same as the outer circle radius of the needle sleeve 2. At this time, the circular structure formed by the blade edge 204 is relatively large, so that more tissue strips on the tissue can be cut, and the tissue sampling amount is guaranteed.
[0023] In other embodiments not shown, the conical surface 203 is arranged on the outer sleeve wall 202, the blade edge 204 is formed at the intersection of the conical surface 203 and the inner sleeve wall 201, and the radius of the circular structure formed by the blade edge 204 is the same as the inner circle radius of the needle sleeve 2. In this embodiment, the circular structure formed by the blade edge 204 is relatively small, which is close to the needle core 3, that is, the circular structure where the blade edge 204 is located has little difference with the outer diameter size of the needle core 3, so that when the needle core 3 pierces the skin, the blade edge 204 can more smoothly pass through the skin.
[0024] In the embodiment, the front end of the needle core 3 is provided with inclined wedge surfaces 32 on the opposite sides of the puncture inclined surface 31, and the arrangement of the inclined wedge surfaces 32 reduces the width of the front end of the needle core 3, so that the front end of the needle core 3 is more easily pierced into the human skin.
[0025] The biopsy needle with the annular blade edge further comprises an outer tube 4, the outer tube 4 is fixedly connected to the front end of the handle 1, the outer tube 4 has a hollow structure, and the needle sleeve 2 penetrates through the outer tube 4.
[0026] Further, the front end of the handle 1 is further fixedly provided with a guide pipe 5, the guide pipe 5 is sleeved outside the rear end of the outer tube 4, and the connection strength between the outer tube 4 and the handle 1 is enhanced by arranging the guide pipe 5, so that the connection part between the outer tube 4 and the handle 1 is effectively prevented from being bent, and the use reliability of the outer tube 4 is guaranteed.
[0027] In addition, the rear end of the handle 1 is further provided with a connecting piece 6, the connecting piece 6 has a hollow structure, the connecting piece 6 is communicated with the needle sleeve 2, and the connecting piece 6 is used for being connected with a suction device to connect the needle sleeve 2 to the suction device.
[0028] The biopsy needle with the annular cutting edge is characterized in that the needle core 3 is first stabbed into the human skin, which is beneficial to the smooth skin piercing of the needle sleeve 2, reduces the pain of the patient, avoids the serious damage of the skin, and when the needle sleeve 2 is stabbed into the sampled tissue, the blade 204 is a 360° omnidirectional blade, so that the tissue strip can be cut at 360° when being stabbed into the tissue, enough tissue strips can be fully and quickly entered into the needle sleeve 2, the sampling amount of the tissue strips is ensured, the condition that the enough tissue strips can be obtained only through repeated puncture is reduced, the use is reliable, and the biopsy needle is suitable for popularization and use.
[0029] The above ideal embodiments according to the utility model are used as inspiration, and through the above description, relevant staff can make various changes and modifications without deviating from the scope of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.
Claims
1. A biopsy needle having an annular cutting edge, characterized by: The biopsy needle comprises a handle, a needle sleeve and a needle core, the needle sleeve is connected with the handle, the needle sleeve is through at both ends, the needle core is movably inserted into the needle sleeve, the front end of the needle core is provided with a puncture bevel, the puncture bevel can be penetrated by the front end of the needle sleeve, the rear end of the needle sleeve is used for connecting with a suction device, the needle sleeve is provided with an inner sleeve wall and an outer sleeve wall, the front end of the needle sleeve is provided with a taper on one of the inner sleeve wall and the outer sleeve wall, the taper intersects with the other of the inner sleeve wall and the outer sleeve wall to form an edge, the edge is a circular structure, and a plane where the edge is located is perpendicular to the central axis of the needle sleeve.
2. The biopsy needle having an annular cutting edge of claim 1 wherein: The taper is arranged on the inner sleeve wall, the edge is formed by the intersection of the taper and the outer sleeve wall, and the radius of the circular structure formed by the edge is the same as the outer circle radius of the needle sleeve.
3. The biopsy needle having an annular cutting edge of claim 1 wherein: The taper is arranged on the outer sleeve wall, the edge is formed by the intersection of the taper and the inner sleeve wall, and the radius of the circular structure formed by the edge is the same as the inner circle radius of the needle sleeve.
4. The biopsy needle having a loop-shaped cutting edge according to any one of claims 1 to 3, characterized in that: The front end of the needle core is provided with a taper on both sides of the puncture bevel.
5. The biopsy needle having a loop-shaped cutting edge according to any one of claims 1 to 3, characterized in that: The biopsy needle further comprises an outer tube, the outer tube is fixedly connected with the front end of the handle, the outer tube is a hollow structure, and the needle sleeve penetrates through the outer tube.
6. The biopsy needle having an annular cutting edge of claim 5 wherein: The front end of the handle is fixedly provided with a guide tube, and the guide tube is sleeved outside the rear end of the outer tube.
7. The biopsy needle having an annular cutting edge of claim 5 wherein: The rear end of the handle is provided with a connecting piece for connecting with the suction device, the connecting piece is a hollow structure, and the connecting piece is communicated with the needle sleeve. The biopsy needle further comprises an outer tube, the outer tube is fixedly connected with the front end of the handle, the outer tube is a hollow structure, and the needle sleeve penetrates through the outer tube.