Biopsy punch and biopsy punch needle

Abstract

The utility model provides a knife head and biopsy needle for biopsy puncture, the knife head includes knife head body, the front end of knife head body has three concave arc surfaces, the intersection of adjacent arc surfaces forms blade part, the front end of arc surface and the front end of blade part form knife tip part, the radius of arc surface is 15mm 25mm, the length of blade part in the axial direction of knife head body is 6 10mm, the rear end of knife head body forms anvil part through chamfer, and the anvil part is used for cutting tissue with cutting edge cooperation. Compared with prior art, the concave arc surface forms the front end of the knife head body in the scheme, and the size of the front end of the knife head body is limited, so that the blade part of the front end of the knife head body is longer than the ordinary puncture knife head, can enter the human tissue smoothly when biopsy puncture, and the puncture resistance is smaller.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a blade and a biopsy needle for biopsy puncture. Background Technology

[0002] Biopsy is the primary method for obtaining histopathological diagnosis of bone and soft tissue tumors, and it requires the use of a biopsy needle. The tip of the biopsy needle is a sharpened blade, which ensures minimal puncture trauma and eliminates the need for sutures. This allows for biopsy sampling while maintaining an aesthetically pleasing appearance, especially important for punctures of the breast or exposed skin.

[0003] Currently, most biopsy needles on the market have flat double-edged or ordinary triangular-edged blades, which cause great resistance during puncture. They are difficult to puncture when encountering fascia or dense tissue, and they also cause larger wounds on the human body surface when entering human tissue. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a biopsy puncture tip and a biopsy puncture needle to solve the problem of high resistance in the use of the puncture tip in the prior art.

[0005] To achieve the above and other related objectives, the technical solution of this utility model is as follows:

[0006] A biopsy puncture tip, comprising:

[0007] The blade body;

[0008] The front end of the cutter head body has three concave arc surfaces, and the intersection of adjacent arc surfaces forms a cutting edge. The front end of the arc surfaces and the front end of the cutting edge form a blade tip. The radius of the arc surfaces is 15mm-25mm, and the length of the cutting edge in the axial direction of the cutter head body is 6-10mm.

[0009] Optionally, the three arc surfaces are of the same size and are evenly distributed at the front end of the cutter head body.

[0010] Optionally, the radius of the arc surface is 20mm.

[0011] Optionally, the length of the cutting edge in the axial direction of the cutter head body is 8mm.

[0012] Optionally, the cutter head body has a first stepped shaft, which is used for the outer cutter tube to be sleeved.

[0013] Optionally, the rear end of the first stepped shaft is further provided with an anvil, the radius of which is smaller than the radius of the first stepped shaft.

[0014] Optionally, the anvil includes a first anvil segment and a second anvil segment connected sequentially along an axial direction from front to back, wherein the cross-sectional profile of the second anvil segment at any axial position is smaller than the cross-sectional profile of the first anvil segment.

[0015] Optionally, the second anvil segment is a frustum of a cone whose diameter gradually decreases along the axial direction from front to back.

[0016] Accordingly, this utility model also provides a biopsy puncture needle, comprising: the blade for biopsy puncture as described in any of the above claims; and,

[0017] A cutting tube assembly, comprising an inner cutting tube and an outer cutting tube, wherein the front end of the outer cutting tube is fixedly connected to the cutting head body, and a through groove is provided on one side of the outer cutting tube; the inner cutting tube is located inside the outer cutting tube, and the front end of the inner cutting tube has a cutting edge.

[0018] In this invention, a biopsy puncture tip is mounted on a biopsy needle, with the tip body connected to the tube assembly. Because the cutting edge is formed by the intersection of three concave arc surfaces, the front end of the entire tip body is streamlined with a gentle transition. The concave cutting edge and arc surfaces reduce puncture resistance, allowing for smooth puncture at the tip. This results in a smaller wound on the body surface after entering the tissue, significantly reducing patient discomfort during the biopsy procedure. Compared to existing technologies, this design uses concave arc surfaces to form the front end of the tip body and limits its size, making the cutting edge longer than ordinary puncture tips. This allows for smooth entry into the tissue during biopsy with less puncture resistance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an exemplary blade for biopsy puncture according to the present invention;

[0020] Figure 2 This is a cross-sectional view of an exemplary biopsy puncture tip of the present invention;

[0021] Figure 3 This is a side view of an exemplary blade for biopsy puncture according to the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the tip of an exemplary biopsy puncture needle according to the present invention;

[0023] Figure 5 This is another structural schematic diagram of the tip of an exemplary biopsy puncture needle of the present invention;

[0024] Figure 6 for Figure 5The structural cross-sectional view at point AA.

[0025] The reference numerals in the embodiments include:

[0026] The blade body 100, the arc surface 101, the blade edge 102, the blade tip 103, the first stepped shaft 104, and the anvil 106.

[0027] Tool tube assembly 200, inner tool tube 201, cutting edge 202, outer tool tube 210, through groove 211. Detailed Implementation

[0028] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0029] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the accompanying drawings, the same reference numerals denote the same components throughout.

[0030] In this invention, the blade used for biopsy puncture is a part of the biopsy puncture needle. The blade is located at the front end of the biopsy puncture needle and is used to puncture human tissue during biopsy puncture. For the specific structure of the biopsy puncture needle, please refer to [reference needed]. Figure 4 , Figure 5 and Figure 6 As shown, the device includes a biopsy tip and a blade assembly 200. The biopsy tip can be any of the biopsy tips described in the following embodiments. The biopsy tip mainly consists of a tip body 100. The tip body 100 has three concave arc surfaces 101 at its front end. The intersection of adjacent arc surfaces 101 forms a cutting edge 102. The front ends of the arc surfaces 101 and the cutting edge 102 form a tip 103. The blade assembly 200 includes an inner blade 201 and an outer blade 210. The front end of the outer blade 210 is fixedly connected to the tip body 100, and a through groove 211 is provided on one side of the outer blade 210. The inner blade 201 is located inside the outer blade 210, and the front end of the inner blade 201 has a cutting edge 202. The cutting edge 202 cooperates with the periphery of the anvil 106 to cut tissue.

[0031] Specifically, in actual implementation, the outer blade tube 210 is fixed to the rear end of the blade body 100, and the inner blade tube 201 is movably disposed inside the outer blade tube 210. After the front end of the blade body 100 is used to pierce the tissue, the tissue can be drawn from the through groove 211 into the inner blade tube 201 by the blade tube assembly 200. Then, the inner blade tube 201 is controlled to move forward or rotate forward at the same time, and the cutting edge 202 at the front end of the inner blade tube 201 is used to cut the tissue, thereby completing the biopsy sampling operation.

[0032] The specific structure of the blade used for biopsy puncture in this utility model is described in conjunction with [reference needed]. Figures 1 to 3 The biopsy puncture tip includes:

[0033] The cutter head body is 100;

[0034] The front end of the cutter head body 100 has three concave arc surfaces 101. The intersection of adjacent arc surfaces 101 forms a cutting edge 102. The front end of the arc surface 101 and the front end of the cutting edge 102 form a tip 103. The radius of the arc surface 101 is 15mm-25mm, and the length of the cutting edge 102 in the axial direction of the cutter head body 100 is 6-10mm.

[0035] In this design, the blade body 100, when in use, has a front end for inserting into human tissue and a rear end for the other. For example... Figure 2 As shown, the radius of the arc surface 101 is R, and the length of the blade part 102 in the axial direction of the blade body 100 is L. In this scheme, in order to reasonably design the length of the blade part 102 at the front end of the blade body 100, R is 15mm-25mm and L is 6-10mm. This makes the blade part 102 longer than that of a normal piercing blade, but the length is reasonable and more conducive to piercing operation.

[0036] In actual implementation, the blade used for biopsy puncture is installed at the front end of the biopsy puncture needle. The blade body 100 is fixedly connected to the blade tube assembly 200, and the outer blade tube 210 is welded to the middle and rear end of the blade body 100. In this design, since the blade portion 102 is formed by the intersection of three concave arc surfaces 101, the front end of the entire blade body 100 is streamlined and has a gentle transition. Both the blade portion 102 and the arc surfaces 101 are concave, reducing the resistance to puncture. This allows the tip 103 of the biopsy puncture needle to puncture smoothly during use, resulting in a small wound on the human body surface after entering the tissue.

[0037] In some embodiments, the three arcuate surfaces 101 are of the same size and are evenly distributed at the front end of the cutter body 100. For example, Figures 1 to 3As shown, at the front end of the cutter body 100, the arc surfaces 101 are evenly distributed along the axial direction of the cutter body 100. Because each arc surface 101 has the same size, the front end of the cutter body 100 can be a uniform and regular streamlined shape, which further reduces the puncture resistance.

[0038] In some embodiments, the radius of the arc surface 101 is 20 mm. For example, Figure 2 As shown, in the specific implementation process, R is taken as 20mm.

[0039] In some embodiments, the cutting edge 102 has an axial length of 8 mm in the cutter head body 100. For example, Figures 1 to 3 As shown, based on the radius setting of the arc surface 101, and with the blade part 102 having an axial length L of 8mm in the blade body 100, the front end of the blade body 100 can maintain a good streamline shape to meet the puncture requirements.

[0040] In some embodiments, the cutter head body 100 has a first stepped shaft 104, which is used for fixedly sleeved connection of the outer cutter tube 210. For example, Figure 1 , Figure 2 , Figure 6 As shown, the first stepped shaft 104 is located in the middle and rear part of the blade body 100, which facilitates the fixing of the front end of the blade tube assembly 200 to the middle and rear part of the blade body 100, and fixes the outer blade tube 210 to the first stepped shaft 104. In an optional embodiment, welding can be used for fixing, so that the blade tube assembly 200 and the blade body 100 are firmly connected without affecting the puncture process.

[0041] In some embodiments, the rear end of the cutter body 100 is further provided with an anvil portion 106, the radius of which is smaller than the radius of the first stepped shaft 104. For example, Figure 1 , Figure 2 , Figure 6 As shown, the radius of the anvil 106 is smaller than the radius of the first step shaft 104, which allows for a gap between the anvil 106 and the outer blade tube 210. This allows the cutting edge 202 to extend into the gap to cut the tissue. When the cutting edge moves toward the anvil and extends into the gap to cut the tissue, the tissue is pushed forward into the gap by the cutting edge. The anvil tensions the tissue backward inside the inner blade tube. During the cutting process, the tissue is in a tensioned state under the combined action of the cutting edge and the anvil, allowing the cutting edge to cut the tissue more smoothly during the feeding process and achieve tissue cutting more efficiently.

[0042] In some embodiments, the anvil portion 106 includes a first anvil segment and a second anvil segment connected sequentially along an axial direction from front to back, wherein the cross-sectional profile of the second anvil segment at any axial position is smaller than the cross-sectional profile of the first anvil segment. For example, Figure 1 , Figure 2 , Figure 6 As shown, the first anvil segment is located at the front end of the second anvil segment. The outer contour of the second anvil segment is smaller than that of the first anvil segment, which allows the cutting edge 202 to penetrate deeper into the gap. This allows the tissue to be tensioned deeper along the axial direction of the cutter body 100, so that the cutting edge 202 can cut the tissue more smoothly.

[0043] In some embodiments, the second anvil segment is a frustum of a cone whose diameter gradually decreases along the axial direction from front to back. For example, Figure 1 , Figure 2 , Figure 6 As shown, the second anvil section is located at the rear end of the cutter head body 100. It is designed as a frustum structure that can be directly machined into shape at the chamfer of the cutter head tail, making it easier to machine the entire anvil section 106.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A blade for biopsy puncture, characterized in that, include: The blade body; The front end of the cutter head body has three concave arc surfaces, and the intersection of adjacent arc surfaces forms a cutting edge. The front end of the arc surfaces and the front end of the cutting edge form a blade tip. The radius of the arc surfaces is 15mm-25mm, and the length of the cutting edge in the axial direction of the cutter head body is 6-10mm.

2. The blade for biopsy puncture according to claim 1, characterized in that: The three arc surfaces are of the same size and are evenly distributed at the front end of the cutter head body.

3. The blade for biopsy puncture according to claim 1, characterized in that: The radius of the arc surface is 20mm.

4. The blade for biopsy puncture according to claim 1, characterized in that: The cutting edge has an axial length of 8mm along the blade body.

5. The blade for biopsy puncture according to claim 1, characterized in that: The cutter head body has a first stepped shaft, which is used for fixing the outer cutter tube.

6. The blade for biopsy puncture according to claim 5, characterized in that: The rear end of the first stepped shaft is further provided with an anvil, the radius of which is smaller than the radius of the first stepped shaft.

7. The blade for biopsy puncture according to claim 6, characterized in that: The anvil includes a first anvil segment and a second anvil segment connected sequentially along an axial direction from front to back. The cross-sectional profile of the second anvil segment at any axial position is smaller than that of the first anvil segment.

8. The blade for biopsy puncture according to claim 7, characterized in that: The second anvil segment is a frustum of a cone whose diameter gradually decreases along the axial direction from front to back.

9. A biopsy puncture needle, comprising a blade assembly, the blade assembly including an inner blade and an outer blade, a through groove provided on one side of the outer blade, the inner blade located inside the outer blade, and the front end of the inner blade having a cutting edge, characterized in that, The biopsy puncture needle further includes a blade for biopsy puncture as described in any one of claims 1-8, wherein the front end of the outer blade tube is fixedly connected to the blade body.

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