Outer knife tube of biopsy sampling needle and biopsy sampling needle

Abstract

The utility model provides an outer knife tube of biopsy sampling needle and biopsy sampling needle, the outer knife tube of biopsy sampling needle comprises an outer knife tube body and a puncture knife head, the puncture knife head is arranged at the far end of the outer knife tube body, the side wall of the far end of the outer knife tube body is provided with a sampling window which is arranged along the extension direction of the outer knife tube body, and the sampling window is arranged on the outer knife tube body. The sampling window is sequentially provided with a horizontal section and a bent section in the direction close to the puncture tool bit, the bent section is bent upwards in the direction close to the puncture tool bit, the puncture tool bit comprises a tool bit main body and a plurality of blades, the tool bit main body is provided with a conical surface, the blades are arranged on the conical surface, and the blades are arranged on the tool bit main body. Edges are arranged at the ends, away from the tool bit main body, of the blades, one ends of the edges of the blades are gathered at the vertex of the conical surface to form a tool nose, the other ends of the edges are connected with the near end of the tool bit main body, and the outer knife tube body is matched with a puncture tool bit, so that wounds caused by puncture of a patient through the outer knife tube are reduced; and the pain of the patient is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an outer cutter tube of a biopsy sampling needle and a biopsy sampling needle. Background Art

[0002] Vacuum-assisted biopsy is a medical technique for minimally invasive treatment or biopsy of breast masses (tumors). Vacuum-assisted biopsy is mainly achieved through a biopsy device, which consists of a main machine, a biopsy sampling needle, a vacuum negative pressure system, etc. The biopsy device mainly punctures the outer cutter tube of the biopsy sampling needle to the operation point under the guidance of an imaging device (such as B-ultrasound), and then electrically controls the inner cutter tube of the biopsy sampling needle to perform partial or complete rotational cutting on the diseased tissue, and finally conveys the cut tissue specimen to the outside through negative pressure for slide preparation and pathological detection and analysis and diagnosis.

[0003] It can be seen that when the biopsy sampling needle works, it is necessary to puncture the outer cutter tube into the patient's body through the outer cutter tube, and then perform cutting operations on the diseased tissue. The pain suffered by the patient during this process depends to a large extent on the biopsy sampling needle, especially the outer cutter tube that plays a puncturing role.

[0004] How to minimize the pain suffered by patients during vacuum-assisted biopsy has become an urgent problem to be solved in clinical work. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an outer cutter tube of a biopsy sampling needle and a biopsy sampling needle, which can reduce the trauma caused by the movement of the outer cutter tube in the patient's body, reduce the adverse effects on body tissues caused by puncture biopsy, and reduce the pain of patients.

[0006] The technical solution provided by the utility model is as follows:

[0007] An outer cutter tube of a biopsy sampling needle includes an outer cutter tube body and a puncture cutter head, and the puncture cutter head is arranged at the distal end of the outer cutter tube body.

[0008] A sampling window is arranged on the side wall at the distal end of the outer cutter tube body along the extension direction of the outer cutter tube body. The sampling window is sequentially provided with a horizontal section and a bending section in the direction close to the puncture cutter head, and the bending section is bent upward in the direction close to the puncture cutter head.

[0009] The puncture cutter head includes a cutter head main body and several cutting edges. The cutter head main body is provided with a conical surface in a conical shape, and the cutting edges are arranged on the conical surface. One end of the cutting edge far from the cutter head main body is provided with a ridge. One ends of the ridges of several cutting edges converge at the vertex of the conical surface to form a cutting tip, and the other ends of the ridges are connected to the proximal end of the cutter head main body.

[0010] In some embodiments, the opening of the bent section gradually narrows in the direction close to the puncture blade tip.

[0011] In some embodiments, the proximal end of the sampling window is connected to the horizontal section through a smooth arc surface.

[0012] In some embodiments, the blade tip body includes a connecting portion and a conical portion having the conical surface. The connecting portion is disposed at the distal end of the outer cutter tube body, and the conical portion is disposed on the side of the connecting portion away from the outer cutter tube body.

[0013] The connecting portion is coaxially disposed with the outer cutter tube body, and the outer diameter of the connecting portion is the same as the outer diameter of the outer cutter tube body.

[0014] In some embodiments, the blade edge is provided with two blade surfaces. The blade surfaces include a first side surface and a second side surface. The first side surface is disposed on the side of the blade edge away from the blade tip body. The two first side surfaces intersect at a preset angle to form the edge. One side of the second side surface is connected to the first side surface, and the other side of the second side surface is connected to the blade tip body.

[0015] In some embodiments, the first side surface includes a first portion and a second portion. One end of the first portion away from the second portion converges at the vertex of the conical surface to form the blade tip, and one end of the second portion away from the first portion is connected to the distal end of the connecting portion.

[0016] The angle between the two second portions of each edge gradually increases in the direction close to the connecting portion.

[0017] In some embodiments, the blade surface is connected to the blade tip body through a first transition surface. One side of the second side surface is connected to the first portion, and the other side of the second side surface is connected to the first transition surface.

[0018] and / or

[0019] The vertex and the blade tip are connected through a second transition surface.

[0020] In some embodiments, the angle between the two first side surfaces of each edge is α, and 30° ≤ α ≤ 45°.

[0021] A biopsy sampling needle includes an outer cutter tube of the biopsy sampling needle described in any one of the above, and further includes an inner cutter tube, an electrode, and a cylindrical insulating blade tip. The distal end of the inner cutter tube is inserted into the outer cutter tube.

[0022] The insulating cutter head is arranged at the distal end of the inner cutter tube and is in communication with the inner cutter tube. One end of the electrode is arranged as an ablation end in a semi-circular arc shape. An installation groove is arranged at the distal end of the insulating cutter head, and the ablation end is installed in the installation groove for cutting lesion tissues.

[0023] In some embodiments, the insulating cutter head includes a first pipe fitting and a second pipe fitting connected in sequence. The end of the second pipe fitting away from the first pipe fitting is connected to the distal end of the inner cutter tube.

[0024] The inner diameter of the first pipe fitting gradually increases in the direction away from the second pipe fitting.

[0025] The outer cutter tube of a biopsy sampling needle and the biopsy sampling needle provided by the present utility model have the following

[0026] beneficial effects:

[0027] 1. For the outer cutter tube of a biopsy sampling needle and the biopsy sampling needle provided by the present utility model, by setting the sampling window as a horizontal section and a curved section, and the curved section is inclined upward in the direction close to the puncture cutter head. When the lesion tissue is inhaled into the sampling window, the acting force between the tissue and the sampling window under the negative pressure can be reduced, thereby reducing the pain of the patient. Moreover, through the design of multiple blades of the puncture cutter head, while ensuring the sharpness of the puncture cutter head, the thrust required for the puncture cutter head to move in the human body can be reduced, further reducing the pain of the patient.

[0028] 2. For the outer cutter tube of a biopsy sampling needle and the biopsy sampling needle provided by the present utility model, the opening of the curved section gradually shrinks in the direction close to the puncture cutter head, which can make the tissue sucked by the curved section of the sampling window gradually decrease in the direction close to the puncture cutter head, facilitating timely cutting off of the lesion tissue to reduce tissue negative pressure traction, thereby reducing the pain of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the solution in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0030] Figure 1 is a schematic structural diagram of the outer cutter tube of a biopsy sampling needle provided by the present utility model;

[0031] Figure 2 is a front view of the sampling window of the outer cutter tube of a biopsy sampling needle provided by the present utility model;

[0032] Figure 3 is a schematic structural diagram of the puncture cutter head of the outer cutter tube of a biopsy sampling needle provided by the present utility model;

[0033] Figure 4 This is the front view of the puncture blade head of the outer blade tube of a biopsy sampling needle provided by the present utility model;

[0034] Figure 5 This is the schematic structural diagram of the insulating blade head of a biopsy sampling needle provided by the present utility model.

[0035] Explanation of the reference numerals in the drawings:

[0036] Outer blade tube body 1, sampling window 11, horizontal section 111, curved section 112, puncture blade head 2, blade head body 21, conical part 211, connecting part 212, blade edge 22, blade surface 221, first side surface 222, first part 2221, second part 2222, second side surface 223, edge 23, first transition surface 24, second transition surface 25, blade tip 26, insulating blade head 31, ablation end 32, electrode 33. Specific embodiments

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings and other embodiments can be obtained.

[0038] To make the drawings concise, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0039] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] In one embodiment, an outer cutter tube of a biopsy sampling needle is described. By cooperating with a sampling window 11 having a curved section 112 and a puncture cutter head 2 provided with a plurality of cutting edges 22, it can reduce the trauma caused by the outer cutter tube puncturing into the patient's body and can relieve the pain of the patient during puncture.

[0042] It should be noted that when a medical staff uses a biopsy sampling needle, the end of the biopsy sampling needle away from the medical staff is the distal end, and the end close to the medical staff is the proximal end. Specifically, referring to the accompanying drawings of the specification Figure 5 , an outer cutter tube of a biopsy sampling needle includes an outer cutter tube body 1 and a puncture cutter head 2, and the puncture cutter head 2 is arranged at the distal end of the outer cutter tube body 1. Among them, a sampling window 11 is arranged on the side wall at the distal end of the outer cutter tube body 1, and the sampling window 11 is arranged along the length direction of the outer cutter tube body 1. The sampling window 11 is sequentially provided with a horizontal section 111 and a curved section 112 in the direction close to the puncture cutter head 2, and the curved section 112 is curved in the direction close to the puncture cutter head 2. When the diseased tissue is inhaled into the sampling window 11, the acting force between the diseased tissue and the sampling window 11 can be reduced, especially the acting force between the diseased tissue and the curved section 112 under the negative pressure, so as to achieve the purpose of reducing the pain of the patient.

[0043] Furthermore, the puncture cutter head 2 includes a cutter head body 21 and cutting edges 22. The cutter head body 21 is provided with a conical surface. The cutting edges 22 are arranged as a plurality of them on the conical surface. An edge 23 is arranged at the end of the cutting edge 22 away from the cutter head body 21. In addition, a tip 26 is arranged at the vertex of the conical surface. The tip 26 is formed by the convergence of one end of the edges 23 of a plurality of cutting edges 22 at the vertex of the conical surface, and the other end of the edge 23 is connected to the proximal end of the cutter head body 21, which improves the strength of the edge 23. The tip is arranged outside the vertex, which can increase the sharpness of the tip 5, so that the medical staff can puncture the patient with a smaller puncture force and reduce the pain of the patient. A plurality of cutting edges 22 are arranged on the cutter head body 21, which can further improve the sharpness of the puncture cutter head 2, reduce the contact area between the puncture cutter head 2 and the patient, and further reduce the puncture force of the medical staff during puncture, and reduce the trauma and pain received by the patient during biopsy.

[0044] When the inner catheter cuts into the diseased tissue within the sampling window 11, when the inner catheter moves to the distal end of the sampling window 11 and is about to completely cut off the diseased tissue, the pain felt by the patient gradually accumulates at this time. Therefore, in this embodiment, by bending the curved section 112 located at the distal end of the sampling window 11, the medical staff can use the outer cutter tube of a biopsy sampling needle provided in this embodiment to reduce the acting force between the diseased tissue and the curved section 112. While ensuring the cutting effect of the inner catheter in the horizontal section 111, it can specifically reduce the pain of the patient in the curved section 112. And through the design of multiple blades 22 of the puncture knife head 2, it can reduce the pain of the patient during the process of the outer cutter tube entering the patient's body.

[0045] In addition, it should be noted that the multiple blades 22 can have exactly the same shape and size to ensure that the pain generated by each blade 22 is the same when the puncture knife head 2 enters the human body. In actual production applications, the number of blades 22 can be modified according to actual situations and will not be elaborated one by one here, all within the protection scope of this utility model.

[0046] In one embodiment, refer to the accompanying drawings of the specification Figure 2 , the opening of the curved section 112 gradually decreases in the direction close to the puncture knife head 2. When the inner catheter moves forward to adsorb the diseased tissue, it can make the curved section of the sampling window 11 gradually reduce the amount of diseased tissue sucked in the direction of 112 close to the puncture knife head 2, which is convenient for timely cutting off the diseased tissue, reducing the difficulty of cutting off the diseased tissue, so as to reduce the negative pressure traction of the diseased tissue, and further reduce the pain of the patient.

[0047] Furthermore, the proximal end of the sampling window 11 and the horizontal section 111 are connected by a smooth arc surface, further reducing the acting force between the diseased tissue and the sampling window, and reducing the pain of the patient.

[0048] In addition, the edges of the sampling window 11 are all set as smooth arc surfaces to further reduce the acting force when the diseased tissue is inhaled into the sampling window 11, and further reduce the pain of the patient.

[0049] In one embodiment, refer to the accompanying drawings of the specification Figure 1 , Figure 4 and Figure 5 , this embodiment further describes the puncture knife head 2. Among them, the knife head main body 21 includes a connecting portion 212 and a conical portion 211. Among them, the conical surface is arranged on the conical portion 211, the connecting portion 212 is arranged at the distal end of the outer cutter tube body 1, and the conical portion 211 is arranged on the side of the connecting portion 212 away from the outer cutter tube body 1.

[0050] In addition, the connecting portion 212 is coaxially arranged with the outer cutter tube body 1, and the outer diameter of the connecting portion 212 is the same as that of the outer cutter tube body 1. It can be understood that the outer diameter of the connecting portion 211 is the same as that of the outer cutter tube body 1, so that the connecting portion 212 and the outer cutter tube body 1 are in a planar transition, which can reduce the resistance suffered by the outer cutter tube when moving in the patient's body, thereby reducing the pain of the patient.

[0051] Further, the blade 22 is provided with two blade surfaces 221. The blade surface 221 includes a first side surface 222 and a second side surface 223. The first side surface 222 is arranged on the side of the blade 22 away from the cutter head body 21. The two first side surfaces 222 intersect at an angle to form an edge 23. One side of the second side surface 223 can be directly connected to the first side surface 222 or indirectly connected to the first side surface 222, and the other side of the second side surface 223 is connected to the cutter head body 21. Through the arrangement of the two blade surfaces 221 of the blade 22, the sharpness of the blade 22 is greatly increased, thereby increasing the sharpness of the puncture cutter head 2, reducing the force required for the puncture cutter head 2 during the puncture process, and reducing the pain of the patient.

[0052] Furthermore, the first side surface 222 includes a first part 2221 and a second part 2222. One end of the first part 2221 away from the second part 2222 converges at the vertex of the conical surface to form a cutting tip 26, and one end of the second part 2222 away from the first part 2221 is connected to the distal end of the connecting portion 212.

[0053] Correspondingly, the angle between the two second parts 2222 of each edge 23 gradually increases in the direction close to the connecting portion 212. The first side surface 222 includes a first part 2221 and a second part 2222. The setting of the first part 2221 can ensure the sharpness of the blade 22, and the preset angle between the two second parts 2222 gradually increases in the direction close to the connecting portion 212, which can increase the connection strength between the blade 22 and the connecting portion 212.

[0054] Preferably, the angle between the two first side surfaces 222 of each edge 23 is set to α, and 30° ≤ α ≤ 45°. It can be understood that by setting the preset angle between 30° and 45°, medical staff only need to use a force of 2N to 5N to puncture the outer cutter tube into the human body. Generally speaking, if the preset angle is less than 30 degrees, although the sharpness of the blade 22 can be further improved, it is easy to cause problems such as insufficient strength of the puncture cutter head 2, easy curling of the blade, chipping of the blade, and high manufacturing difficulty. At the same time, it will also make the length of the cutter head too long, increasing the length of the puncture cutter head 2 extending into the human tissue, that is, the ineffective extension length is longer, which will instead cause discomfort to the patient.

[0055] In one embodiment, see the accompanying drawings of the specification Figure 4, the blade surface 221 is connected to the tool tip body 21 through the first transition surface 24. One side of the second side surface 223 is connected to the first part 2221, and the other side of the second side surface 223 is connected to the first transition surface 24. Correspondingly, the vertex of the conical surface and the tool tip 26 are connected through the second transition surface 25.

[0056] Preferably, the ends of each second side surface 223 of each cutting edge 22, which are away from the first side surface 222, are inclined and close to each other to reduce the thickness of the cutting edge 22 and relieve the pain of the patient. The first transition surface 24 is an arc surface. One side of the first transition surface 24 is connected to the second side surface 223 and the second part 2222, and the other side of the first transition surface 24 is connected to the tool tip body. And the first transition surface 24 is bent inward to ensure the strength of the cutting edge 22.

[0057] In one embodiment, this embodiment provides a biopsy sampling needle, which includes the outer knife tube of a biopsy sampling needle in any of the above embodiments, and also includes an inner knife tube, an electrode 33 and a cylindrical insulating tool tip 31. The distal end of the inner knife tube is inserted into the outer knife tube and can move relative to the outer knife tube. Correspondingly, the insulating tool tip 31 is arranged at the distal end of the inner knife tube and is communicated with the inner knife tube. One end of the electrode 33 is set as an ablation end 32 in a semi-circular arc shape. An installation groove is arranged at the distal end of the insulating tool tip 441, and the ablation end 32 is installed in the installation groove for cutting the diseased tissue. By installing the ablation end 32 at the distal end of the insulating tool tip 31, when the inner catheter 4 moves relative to the outer knife tube, the ablation end 32 moves within the sampling window 11 to cut the diseased tissue located within the sampling window 11.

[0058] It can be understood that the ablation end 41 of the electrode is semi-circular, so that the energy of the electrode is better concentrated at the ablation end 41, which is convenient for the ablation end 32 to cut the diseased tissue, reduces the difficulty of cutting the diseased tissue, and further reduces the pain of the user. And through the setting of the bending section 112 and the puncture tool tip 2, the pain of the patient can be further reduced. Preferably, the installation groove is circular, which is convenient for installation, reduces the process requirements for positive and reverse installation, and the assembly is more free.

[0059] The insulating cutter head 31 includes a first pipe fitting 411 and a second pipe fitting 412 that are connected in sequence. One end of the second pipe fitting 412 away from the first pipe fitting 411 is connected to the distal end of the inner cutter tube. In addition, the inner diameter of the first pipe fitting 411 gradually increases in the direction away from the second pipe fitting 412, so that the first pipe fitting 411 is in a flared shape, improving the internal space, increasing the tissue sampling capacity, and facilitating the entry of the lesion tissue into the insulating cutter head 31. Preferably, a blade (not shown in the drawings) is also provided in the outer cutter tube body 1. The blade is provided at one end of the bending section 112 away from the horizontal section 111, and the blade does not protrude from the edge of the sampling window 11. Therefore, when the insulating cutter head 31 moves forward and the negative pressure sucks the lesion tissue into the sampling window 11, the lesion tissue will not be cut by the blade. When the insulating cutter head 31 completely coincides with the sampling window 11 and continues to move forward, the lesion tissue will be cut by the blade while being affected by the ablation end 32 to quickly complete the cutting and separation of the lesion tissue, reducing the patient's operation time and pain.

[0060] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An outer cutter tube of a biopsy sampling needle, characterized in that It includes an outer cutter tube body and a puncture cutter head, and the puncture cutter head is arranged at the distal end of the outer cutter tube body; A sampling window is arranged on the side wall of the distal end of the outer cutter tube body along the extension direction of the outer cutter tube body. The sampling window is sequentially provided with a horizontal section and a bending section in the direction close to the puncture cutter head, and the bending section is bent upward in the direction close to the puncture cutter head; The puncture cutter head includes a cutter head body and several cutting edges. The cutter head body is provided with a conical surface in a conical shape, and the cutting edges are arranged on the conical surface. An edge is arranged at one end of the cutting edge far from the cutter head body. One ends of the edges of several cutting edges converge at the vertex of the conical surface to form a tool tip, and the other end of the edge is connected to the proximal end of the cutter head body.

2. The outer cutter tube of a biopsy sampling needle according to claim 1, characterized in that, The opening of the bending section gradually shrinks in the direction close to the puncture cutter head.

3. The outer cutter tube of a biopsy sampling needle according to claim 2, wherein The proximal end of the sampling window is connected to the horizontal section through a smooth arc surface.

4. The outer cutter tube of a biopsy sampling needle according to claim 1, characterized in that, The cutter head body includes a connecting part and a conical part with the conical surface. The connecting part is arranged at the distal end of the outer cutter tube body, and the conical part is arranged on the side of the connecting part far from the outer cutter tube body; The connecting part is coaxially arranged with the outer cutter tube body, and the outer diameter of the connecting part is the same as the outer diameter of the outer cutter tube body.

5. The outer cutter tube of a biopsy sampling needle according to claim 4, wherein, The cutting edge is provided with two cutting surfaces. The cutting surface includes a first side surface and a second side surface. The first side surface is arranged on the side of the cutting edge far from the cutter head body. The two first side surfaces intersect at a preset angle to form the edge. One side of the second side surface is connected to the first side surface, and the other side of the second side surface is connected to the cutter head body.

6. The outer cutter tube of a biopsy sampling needle according to claim 5, characterized in that, The first side surface includes a first part and a second part. One end of the first part far from the second part converges at the vertex of the conical surface to form the tool tip, and one end of the second part far from the first part is connected to the distal end of the connecting part; The angle between the two second parts of each edge gradually increases in the direction close to the connecting part.

7. The outer cutter tube of a biopsy sampling needle according to claim 6, characterized in that, The cutting surface is connected to the cutter head body through a first transition surface. One side of the second side surface is connected to the first part, and the other side of the second side surface is connected to the first transition surface; and / or The vertex and the tool tip are connected through a second transition surface.

8. The outer cutter tube of a biopsy sampling needle according to claim 7, characterized in that, The angle between the two first side surfaces of each edge is α, and 30°≤α≤45°.

9. A biopsy sampling needle, characterized in that, It includes the outer cutter tube of a biopsy sampling needle according to any one of claims 1-8, and further includes an inner cutter tube, an electrode, and a cylindrical insulating cutter head. The distal end of the inner cutter tube is inserted into the outer cutter tube; The insulating cutter head is arranged at the distal end of the inner cutter tube and is communicated with the inner cutter tube. One end of the electrode is set as an ablation end in a semi-circular arc shape. An installation groove is arranged at the distal end of the insulating cutter head, and the ablation end is installed in the installation groove for cutting diseased tissue.

10. A biopsy sampling needle according to claim 9, characterized in that, The insulating cutter head includes a first pipe fitting and a second pipe fitting connected in sequence. One end of the second pipe fitting far from the first pipe fitting is connected to the distal end of the inner cutter tube; The inner diameter of the first pipe fitting gradually increases in the direction away from the second pipe fitting.

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