Biopsy tool bit and biopsy puncture needle

Abstract

The utility model provides a convenient biopsy knife head and biopsy puncture needle, the biopsy puncture needle includes the biopsy knife head and knife tube subassembly, the biopsy knife head includes the knife head body, the front end of the knife head body is provided with a knife tip part, the rear end of the knife head body is provided with an anvil part, the diameter of the anvil part is smaller than that of the knife head body; the cutter tube assembly comprises an inner cutter tube and an outer cutter tube which are sleeved inside and outside, a sampling window is formed in the side wall of the outer cutter tube, a cutting edge is arranged at the front end of the inner cutter tube, the front end of the outer cutter tube is fixedly connected with the cutter head body, and a gap is formed between the outer wall of the inner cutter tube and the periphery of the anvil part; the gap is used for allowing the cutting edge of the inner cutter tube to be inserted therein. Compared with the prior art, in the scheme, the biopsy sampling process of the human tissue is easy and convenient to operate, the sampling process can be rapidly completed, and the pain of a patient is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, in particular to a biopsy knife head and a biopsy puncture needle. Background Art

[0002] Biopsy puncture is the main method for obtaining histopathological diagnosis of bone and soft tissue tumors, and a biopsy puncture needle is required. The front end of the biopsy puncture needle is a knife head. The tip of the knife head can ensure that the puncture of the biopsy puncture needle is small and does not require stitches. It can not only perform biopsy sampling, but also ensure beautiful appearance, especially for puncture operations on the breast or exposed skin.

[0003] After the biopsy puncture needle punctures the human tissue, biopsy sampling needs to be completed. The biopsy sampling mainly uses the cutting edge to cut the tissue. However, the cutting edge at the front end of the inner knife tube is difficult to cut during the tissue cutting process because the tissue is soft, resulting in the biopsy sampling process being not smooth and requiring a long time to successfully cut the tissue. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a biopsy blade and a biopsy puncture needle to solve the problem that the blade in the prior art does not cut tissue smoothly.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the technical solution of the utility model is as follows:

[0006] A biopsy puncture needle, comprising:

[0007] A biopsy blade, the biopsy blade comprising a blade body, the front end of the blade body having a blade tip, the rear end of the blade body having an anvil, the diameter of the anvil being smaller than the diameter of the blade body;

[0008] The knife tube assembly comprises an inner knife tube and an outer knife tube which are connected with each other inside and outside. A sampling window is provided on the side wall of the outer knife tube. A cutting edge is provided at the front end of the inner knife tube. The front end of the outer knife tube is fixedly connected to the cutter head body. A gap is formed between the outer wall of the inner knife tube and the four sides of the anvil part. The gap is used for inserting the cutting edge of the inner knife tube.

[0009] Optionally, the anvil portion includes a first anvil segment and a second anvil segment connected in sequence along the axial direction from front to rear, and the cross-sectional profile of the second anvil segment at any axial position is smaller than the cross-sectional profile of the anvil segment, so that a first gap between the outer wall of the inner knife tube and the surrounding area of ​​the second anvil segment is larger than a second gap between the outer wall of the inner knife tube and the surrounding area of ​​the first anvil segment.

[0010] Optionally, the second anvil segment is a frustum of which the diameter gradually decreases along the axial direction from front to rear.

[0011] Optionally, a first angle is formed between the outer wall of the truncated cone and the axis of the anvil;

[0012] The front end of the inner blade tube has an inner bevel that forms a second angle with the outer wall of the inner blade tube, and the intersection of the inner bevel and the inner blade tube forms the cutting edge;

[0013] Wherein, the first angle is greater than or equal to the second angle.

[0014] Correspondingly, the utility model also provides a biopsy blade head, comprising:

[0015] The blade body;

[0016] The front end of the blade body has a blade tip for puncturing tissue;

[0017] The rear end of the cutter head body is provided with an anvil portion, and the diameter of the anvil portion is smaller than the diameter of the cutter head body.

[0018] Optionally, the anvil portion comprises a first anvil segment and a second anvil segment sequentially connected along an axial direction from front to rear, and a cross-sectional profile of the second anvil segment at any axial position is smaller than a cross-sectional profile of the anvil segment.

[0019] Optionally, the second anvil segment is a frustum of which the diameter gradually decreases along the axial direction from front to rear.

[0020] Optionally, a first angle is formed between the outer wall of the truncated cone and the axis of the anvil;

[0021] The front end of the inner blade tube has an inner bevel that forms a second angle with the outer wall of the inner blade tube, and the intersection of the inner bevel and the inner blade tube forms the cutting edge;

[0022] Wherein, the first angle is greater than or equal to the second angle.

[0023] Optionally, the cutter head body has a first stepped shaft located between the cutter tip portion and the anvil portion along the axial direction, and an outer diameter of the first stepped shaft is greater than an outer diameter of the anvil portion.

[0024] In the utility model, the biopsy blade on the biopsy puncture needle includes a blade body, the rear end of the blade body has an anvil portion, and the diameter of the anvil portion is smaller than the diameter of the blade body, and a gap is formed between the outer wall of the inner blade tube and the four sides of the anvil portion, so that when the cutting edge moves toward the anvil portion and extends into the gap to cut tissue, the tissue will be pushed forward into the gap by the cutting edge for cutting, and the anvil portion tensions the tissue backward inside the inner blade tube. During the cutting process, the tissue is in a tensioned state under the joint action of the cutting edge and the anvil portion, and the cutting edge can cut tissue more smoothly during the feeding process, and more efficiently achieve tissue cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an exemplary biopsy cutter head of the utility model;

[0026] Figure 2 This is a cross-sectional view of an exemplary biopsy cutter head of the utility model;

[0027] Figure 3 This is a schematic structural diagram of an exemplary biopsy puncture needle front end of the utility model;

[0028] Figure 4 Another structural schematic diagram of the front end of an exemplary biopsy puncture needle of the utility model;

[0029] Figure 5 for Figure 4 Structural cross-section view at AA in the middle;

[0030] Figure 6 It is a cross-sectional view of the rear structure of the biopsy knife head and the front structure of the knife tube assembly.

[0031] The description of the reference numerals in the embodiments includes:

[0032] The blade body 100, the arc surface 101, the blade portion 102, the blade tip portion 103, the first step shaft 104, the anvil portion 106, the first anvil segment 1061, the second anvil segment 1062, the gap 107, the first gap 1071, the second gap 1072, the inner bevel 108,

[0033] The knife tube assembly 200 , the inner knife tube 201 , the cutting knife 202 , the inner bevel 203 , the outer knife tube 210 , and the sampling window 211 . DETAILED DESCRIPTION

[0034] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0035] It should be understood that the utility model can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and fully convey the scope of the utility model to those skilled in the art. In the accompanying drawings, the same reference numerals represent the same components throughout.

[0036] The specific structure of a biopsy puncture needle in the utility model is shown in FIG. Figures 1 to 6As shown, the biopsy needle comprises:

[0037] A biopsy blade, the biopsy blade comprising a blade body 100, the front end of the blade body 100 having a blade tip, the rear end of the blade body 100 having an anvil 106, the diameter of the anvil 106 being smaller than the diameter of the blade body 100;

[0038] The knife tube assembly 200 includes an inner knife tube 201 and an outer knife tube 210 which are connected inner and outer. The side wall of the outer knife tube 210 is provided with a sampling window 211. The front end of the inner knife tube 201 has a cutting edge. The front end of the outer knife tube 210 is fixedly connected to the cutter head body 100. A gap 107 is formed between the outer wall of the inner knife tube 201 and the four sides of the anvil part 106. The gap 107 is used for the cutting edge of the inner knife tube 201 to be inserted.

[0039] In the use state, the end of the blade body 100 for piercing human tissue is the front end, and the other end is the rear end. In an optional embodiment, the front end of the blade body 100 has three concave arc surfaces 101, and the intersection of adjacent arc surfaces 101 forms a blade portion 102, and the front ends of the arc surfaces 101 and the blade portions 102 form a blade tip 103. The above-mentioned blade tip portion refers to the portion of the front end of the blade body 100 having the blade portion 102 and the blade tip 103 along the axial direction.

[0040] During surgery, tissue enters the outer knife tube from the sampling window, and the inner knife tube moves forward or moves forward and rotates inside the outer knife tube. When it contacts the tissue, it starts to cut the tissue. In the utility model, since the rear end of the knife head body 100 has an anvil 106, and a gap 107 is formed between the outer wall of the inner knife tube 201 and the four sides of the anvil 106, when the cutting edge moves toward the anvil 106 and extends into the gap 107 for tissue cutting, the tissue will be pushed forward by the cutting edge into the gap 107 for cutting, and the anvil 106 tensions the tissue backward inside the inner knife tube 201. During the cutting process, the tissue is in a tensioned state under the joint action of the cutting edge and the anvil 106, and the cutting edge can cut tissue more smoothly during the feeding process, thereby achieving tissue cutting more efficiently.

[0041] In some embodiments, the anvil portion 106 includes a first anvil segment 1061 and a second anvil segment 1062 connected in sequence along the axial direction from front to rear, and the cross-sectional profile of the second anvil segment 1062 at any axial position is smaller than the cross-sectional profile of the anvil segment, so that the first gap 1071 between the outer wall of the inner knife tube 201 and the periphery of the second anvil segment 1062 is larger than the second gap 1072 between the outer wall of the inner knife tube 201 and the periphery of the first anvil segment 1061. For example, Figure 6As shown, the gap 107 is arranged in sections, so that the cutting knife 202 at the front end of the inner knife tube 201 can be inserted deeper and more smoothly into the gap 107, which also enables the tissue to be tensioned deeper in the axial direction to facilitate the cutting process.

[0042] In some embodiments, the second anvil segment 1062 is a frustum with a diameter gradually decreasing along the axial direction from front to back. Figure 1 , Figure 2 and Figure 6 As shown, if the blank processed by the entire anvil portion 106 is a cylinder arranged at the rear end of the cutter head body 100, then the frustum can be formed by chamfering the rear end of the blank. In this case, the second anvil segment 1062 is directly formed by chamfering, which facilitates the processing of the second anvil segment 1062.

[0043] In some embodiments, a first angle is formed between the outer wall of the truncated cone and the axis of the anvil 106;

[0044] The front end of the inner blade tube 201 has an inner bevel 108 which forms a second angle with the outer wall of the inner blade tube 201, and the intersection of the inner bevel 108 and the inner blade tube 201 forms the cutting edge;

[0045] Wherein, the first angle is greater than or equal to the second angle.

[0046] like Figure 6 As shown, the first angle is θ2 and the second angle is θ1. Limiting the relative angles of θ1 and θ2 can further ensure that the tissue allows the inner knife tube 201 to be inserted deeper into the gap 107, so that the tissue can be tensioned deeper in the axial direction. Of course, in the actual implementation process, it is not excluded that the first angle is smaller than the second angle.

[0047] In some embodiments, the cutter head body 100 has a first stepped shaft 104 located between the cutter tip and the anvil 106 in the axial direction, the outer diameter of the first stepped shaft 104 is larger than the outer diameter of the anvil 106, and the outer cutter tube 210 is fixedly sleeved outside the first stepped shaft 104. For example, Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the provision of the first stepped shaft 104 can facilitate the fixed connection between the outer knife tube 210 and the biopsy knife head. In a possible implementation, the two are fixed as one by welding.

[0048] The utility model also includes another embodiment of a biopsy blade head, which is a part of a biopsy puncture needle. The biopsy blade head is installed at the front end of the blade tube assembly 200. When the biopsy puncture needle is used, the biopsy blade head is used to pierce human tissue. The biopsy blade head can be any of the biopsy blade heads mentioned in the above embodiments. The biopsy blade head can achieve the corresponding effect by being used in conjunction with the blade tube assembly corresponding to the above embodiments. The specific structure of the biopsy blade head will not be described in detail here.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A biopsy puncture needle, characterized in that: include: A biopsy blade, the biopsy blade comprising a blade body, the front end of the blade body having a blade tip, the rear end of the blade body having an anvil, the diameter of the anvil being smaller than the diameter of the blade body; The knife tube assembly comprises an inner knife tube and an outer knife tube which are connected with each other inside and outside. A sampling window is provided on the side wall of the outer knife tube. A cutting edge is provided at the front end of the inner knife tube. The front end of the outer knife tube is fixedly connected to the cutter head body. A gap is formed between the outer wall of the inner knife tube and the four sides of the anvil part. The gap is used for inserting the cutting edge of the inner knife tube.

2. The biopsy puncture needle according to claim 1, characterized in that: The anvil portion includes a first anvil segment and a second anvil segment connected in sequence along an axial direction from front to rear, and the cross-sectional profile of the second anvil segment at any axial position is smaller than the cross-sectional profile of the anvil segment, so that a first gap between the outer wall of the inner knife tube and the surrounding area of ​​the second anvil segment is larger than a second gap between the outer wall of the inner knife tube and the surrounding area of ​​the first anvil segment.

3. The biopsy puncture needle according to claim 2, characterized in that: The second anvil segment is a frustum with a diameter gradually decreasing along the axial direction from front to rear.

4. The biopsy puncture needle according to claim 3, characterized in that: A first angle is formed between the outer wall of the truncated cone and the axis of the anvil; The front end of the inner blade tube has an inner bevel that forms a second angle with the outer wall of the inner blade tube, and the intersection of the inner bevel and the inner blade tube forms the cutting edge; Wherein, the first angle is greater than or equal to the second angle.

5. The biopsy puncture needle according to claim 1, characterized in that: The cutter head body has a first stepped shaft located between the cutter tip and the anvil portion in the axial direction, the outer diameter of the first stepped shaft is larger than the outer diameter of the anvil portion, and the outer cutter tube is fixedly sleeved outside the first stepped shaft.

6. A biopsy blade, characterized in that: include: The blade body; The front end of the blade body has a blade tip for puncturing tissue; The rear end of the cutter head body is provided with an anvil portion, and the diameter of the anvil portion is smaller than the diameter of the cutter head body.

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

8. The biopsy blade according to claim 7, characterized in that: The second anvil segment is a frustum with a diameter gradually decreasing along the axial direction from front to rear.

9. The biopsy blade according to claim 8, characterized in that: A first angle is formed between the outer wall of the truncated cone and the axis of the anvil; The front end of the inner knife tube has an inner bevel that forms a second angle with the outer wall of the inner knife tube, and the intersection of the inner bevel and the inner knife tube forms a cutting edge; Wherein, the first angle is greater than or equal to the second angle.

10. The biopsy blade according to claim 6, characterized in that: The cutter head body has a first stepped shaft located between the cutter tip portion and the anvil portion in the axial direction, and an outer diameter of the first stepped shaft is greater than an outer diameter of the anvil portion.

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