A new type of vertebral bone tissue biopsy instrument

Abstract

The present invention relates to a novel vertebral bone tissue biopsy instrument, comprising a cutting assembly, an adjusting assembly and an outer tube assembly which are sequentially sleeved from the inside to the outside, wherein the cutting assembly comprises a cutting piece and a handle, wherein the proximal end of the cutting piece is fixedly connected to the handle, wherein the adjusting assembly comprises an adjusting tube and an adjusting handle, wherein the proximal end of the adjusting tube is fixedly connected to the adjusting tube handle, and by operating the adjusting tube handle, the adjusting tube can slide axially along the cutting piece to realize the recovery and release of the distal end of the cutting piece, and the outer tube assembly comprises an outer tube and an outer tube handle, wherein the proximal end of the outer tube is fixedly connected to the outer tube handle, and by operating the outer tube handle, the outer tube can move axially with the adjusting tube and the cutting piece.

Description

Technical Field

[0001] The invention belongs to the field of medical instruments and relates to an instrument for taking biopsy of vertebral bone tissue. Background Art

[0002] The main indications for percutaneous vertebroplasty are osteoporotic compression fractures and vertebral tumors, among which vertebral tumors are the earliest users of percutaneous vertebroplasty. In order to determine the pathology of the tumor, a puncture biopsy is required during the operation. At present, the most commonly used biopsy instrument on the market consists of a needle core part and a needle tube part. The needle tube part is mainly inserted into the vertebral body, and the bone tissue in the vertebral body is rotated or suctioned to enter the needle tube to achieve the extraction of the diseased tissue. However, in clinical feedback, it is difficult to retain bone tissue in the needle tube during withdrawal during operation with existing instruments, and there is a high probability that sufficient bone tissue cannot be obtained for pathological examination.

[0003] In order to solve the above problems, a biopsy instrument that can ensure that more bone tissue can be obtained is urgently needed. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a vertebral bone tissue biopsy instrument to solve the problems raised in the above background. The present invention is easy to use and operate, can ensure that more bone tissue is retained in the outer tube of the biopsy instrument, and has high reliability.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a new type of vertebral bone tissue biopsy instrument, including a cutting assembly, an adjustment assembly and an outer tube assembly which are sequentially arranged from the inside to the outside, the cutting assembly including a cutting piece and a handle, the proximal end of the cutting piece is fixedly connected to the handle, the adjustment assembly includes an adjustment tube and an adjustment handle, the proximal end of the adjustment tube is fixedly connected to the adjustment tube handle, and the adjustment tube slides axially along the cutting piece by operating the adjustment tube handle to realize the recovery and release of the distal end of the cutting piece, the outer tube assembly includes an outer tube and an outer tube handle, the proximal end of the outer tube is fixedly connected to the outer tube handle, and the outer tube moves axially relative to the adjustment tube and the cutting piece by operating the outer tube handle.

[0006] Furthermore, the cutting element may be made of one wire or multiple wires or a tube.

[0007] Furthermore, the cutting element is made of shape memory alloy or elastic metal alloy.

[0008] Furthermore, the distal end portion of the cutting member is divided into an L-shaped structure, a T-shaped structure or a plurality of L-shaped structures.

[0009] Furthermore, the distal end portion of the outer tube is serrated.

[0010] Compared with the prior art, the advantages and improvements of the present invention are as follows:

[0011] The vertebral bone tissue biopsy instrument of the present invention is simple to operate and easy to use. During use, after the instrument is inserted into the puncture channel, the adjustment tube handle is operated to release the cutting piece, and then the outer tube handle is operated to move the outer tube to be flush with the cutting piece, and then the instrument is rotated to separate the bone tissue in the outer tube from the vertebral body, so as to obtain enough bone tissue for pathological examination. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the distal cross-sectional structure of the present invention;

[0014] Figure 3 A schematic diagram of the structure of a new type of cutting piece used in this invention;

[0015] Figure 4 This is a schematic diagram of the distal end structure of the outer tube of the present invention;

[0016] Figure 5 It is a schematic diagram of the structure of the present invention entering the initial state of the vertebral body;

[0017] Figure 6 This is a schematic diagram of the structure of the regulating tube after withdrawal of the present invention;

[0018] Figure 7 It is a schematic diagram of the structure after the outer tube of the present invention completely enters the vertebral body.

[0019] The numbers in the accompanying drawings are as follows: 1 is the cutting assembly, 11 is the cutting piece, 111 is the distal end of the cutting piece, 12 is the handle, 2 is the adjusting assembly, 21 is the adjusting tube, 22 is the adjusting handle, 3 is the outer tube assembly, 31 is the outer tube, 32 is the outer tube handle, and 311 is the distal end of the outer tube. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the accompanying drawings and examples.

[0021] The proximal end mentioned in the present invention refers to the end close to the surgical operator, and the distal end refers to the end far away from the surgical operator.

[0022] Example

[0023] like Figure 1-2As shown, a novel vertebral bone tissue biopsy instrument includes a cutting assembly 1, an adjusting assembly 2 and an outer tube assembly 3 which are sequentially arranged from the inside to the outside, the cutting assembly 1 includes a cutting piece 11 and a handle 12, the proximal end of the cutting piece 11 is fixedly connected to the handle 12, the adjusting assembly 2 includes an adjusting tube 21 and an adjusting handle 22, the proximal end of the adjusting tube 21 is fixedly connected to the adjusting tube handle 22, by operating the adjusting tube handle 22, the adjusting tube 21 can slide axially along the cutting piece 11 to realize the recovery and release of the distal end 111 of the cutting piece, the outer tube assembly 3 includes an outer tube 31 and an outer tube handle 32, the proximal end of the outer tube 31 is fixedly connected to the outer tube handle 32, by operating the outer tube handle 32, the outer tube 31 can move axially relative to the adjusting tube 21 and the cutting piece 11.

[0024] like Figure 3 As shown, the cutting member 11 can be made of one wire or multiple wires or tubes, and the cutting member 11 is made of shape memory alloy or elastic metal alloy. The distal end portion 111 of the cutting member is an L-shaped structure, a T-shaped structure or multiple L-shaped structures.

[0025] like Figure 4 As shown, the outer tube distal end portion 311 is serrated.

[0026] The specific surgical procedure is as follows: first, the puncture channel is established with the assistance of the C-arm, and then a new type of vertebral bone tissue biopsy instrument of the present invention is placed into the puncture needle tube (such as Figure 5 As shown), the adjusting tube handle 22 is operated to withdraw the adjusting tube 21, and the distal end portion 111 of the cutting member is completely released (as shown in FIG. Figure 6 Then, the outer tube handle 32 is operated so that the end surface of the outer tube 31 slides to the distal end portion 111 of the cutting member (as shown in FIG. Figure 7 The outer tube is flush with the vertebral body (as shown), and then the entire set of instruments is rotated to separate the bone tissue inside the outer tube from the vertebral body. The vertebral bone tissue biopsy instrument is then withdrawn to complete the biopsy operation.

Claims

1. A novel vertebral bone tissue biopsy instrument, characterized in that: The invention comprises a cutting assembly, an adjusting assembly and an outer tube assembly which are sequentially sleeved from the inside to the outside, wherein the cutting assembly comprises a cutting piece and a handle, wherein the proximal end of the cutting piece is fixedly connected to the handle, wherein the adjusting assembly comprises an adjusting tube and an adjusting handle, wherein the proximal end of the adjusting tube is fixedly connected to the adjusting tube handle, and the adjusting tube slides axially along the cutting piece by operating the adjusting tube handle to realize the recovery and release of the distal end of the cutting piece, and the outer tube assembly comprises an outer tube and an outer tube handle, wherein the proximal end of the outer tube is fixedly connected to the outer tube handle, and the outer tube moves axially relative to the adjusting tube and the cutting piece by operating the outer tube handle; Wherein, the cutting element is made of shape memory alloy or elastic metal alloy; Wherein, the distal end portion of the cutting member is divided into an L-shaped structure, a T-shaped structure or a plurality of L-shaped structures.

2. A novel vertebral bone tissue biopsy instrument according to claim 1, characterized in that: The cutting element is made of one wire or multiple wires or a tube.

3. A novel vertebral bone tissue biopsy instrument according to claim 1, characterized in that: The distal end of the outer tube is divided into a sawtooth shape.

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