CN214017629U - Centrum bone biopsy device - Google Patents
Centrum bone biopsy device Download PDFInfo
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- CN214017629U CN214017629U CN202021921527.5U CN202021921527U CN214017629U CN 214017629 U CN214017629 U CN 214017629U CN 202021921527 U CN202021921527 U CN 202021921527U CN 214017629 U CN214017629 U CN 214017629U
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Abstract
The utility model relates to a centrum bone biopsy device, which comprises a sampling tube for accommodating a bone tissue sample and an outer sleeve for guiding the sampling tube; the sampling end edge opening of the sampling tube is in a sawtooth shape, and a threaded section is arranged in the area, close to the sampling end, of the inner wall of the sampling tube; the top end of the outer sleeve is provided with an outer diameter reducing part for penetrating into the pedicle cavity. The beneficial effects of the utility model are that when letting the bone tissue be convenient for more draw, promoted the sample success rate.
Description
Technical Field
The utility model relates to an orthopedic surgical instrument, in particular to a device for carrying out tissue biopsy on vertebral bone.
Background
Compression fracture of the thoracolumbar spine is a common disease in clinic. The imaging is manifested by a fracture of the trabecular bone and a loss of vertebral body height. Compression fractures of the thoracolumbar spine are commonly found in two categories: non-pathological vertebral fractures and pathological vertebral fractures. Non-pathological vertebral body fractures are caused by external violence, which leads to fracture of trabeculae and reduction of vertebral body height, and the condition is often seen in patients with severe osteoporosis. Another type of vertebral body fracture is pathological fracture, which is caused by strength damage due to primary or metastatic tumor of vertebral body, which attacks and destroys the trabecular bone and cortical bone structure of vertebral body. Clinically, in the treatment of compression fracture of thoracolumbar vertebrae, it is necessary to first determine whether the fracture is caused pathologically or non-pathologically. The histopathological examination of bones by centrum bone tissue biopsy is the most important means for determining the fracture properties.
Currently, there are two main types of biopsy operations for vertebral bone tissue in clinical use: open surgery bone tissue biopsy and minimally invasive surgery bone tissue biopsy. The former has been rarely used due to the large trauma and high complications. At present, the most widely used method in clinic is bone tissue biopsy in percutaneous minimally invasive surgery. Percutaneous aspiration of vertebral bone tissue biopsy requires the use of special biopsy devices. Bone tissue samples were taken by screwing a biopsy sampling tube into the cancellous bone of the vertebral body. The sampling tube used clinically is cylindrical, and the inside wall is smooth. When the sampling needle tube is pulled out, because the bone tissue sample in the sampling tube is connected with the spongy bone of the vertebral body, the friction force between the bone tissue sample and the sampling tube is too small, and the bone tissue sample often slides off, so that the sampling failure is caused. Thus, there are the following drawbacks:
1. when the sampling tube is pulled out, the bone tissue sample is easy to slide, which results in failure of sampling.
2. Along with the increase of the screwing depth of the sampling tube into the vertebral body, the resistance of the bone tissue sample is gradually increased, so that the bone tissue sample is compressed, the difficulty of the bone tissue entering the sampling tube is increased, and the material taking amount is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's is not enough, solves the bone tissue sample difficult problem of taking a sample, guarantees the sample quality of bone tissue sample simultaneously.
In order to achieve the purpose of the utility model, the utility model provides a centrum bone biopsy device, which comprises a sampling tube for accommodating a bone tissue sample and an outer sleeve for guiding the sampling tube; the sampling end edge opening of the sampling tube is in a sawtooth shape, and a threaded section is arranged in the area, close to the sampling end, of the inner wall of the sampling tube; the top end of the outer sleeve is provided with an outer diameter reducing part for penetrating into the pedicle cavity.
The inner wall of the sampling tube may be provided with a smooth surface over a substantial area to facilitate movement of the sample therethrough.
Preferably, the outer sleeve and the body of sampling tube establish the scale respectively along the axial.
The outer sleeve can be set to transparent material to more conveniently contrast the position relation between outer sleeve and the sampling tube.
Preferably, the area of the sampling tube close to the sampling end is provided with an inner diameter reducing part.
The inner diameter reducing portion referred to herein may be one in which the outer diameter is reduced simultaneously with the inner diameter, or one in which only the inner diameter is reduced.
Preferably, the threaded section is located in the reduced inner diameter portion.
Preferably, the inner diameter reducing part and the inner wall of the sampling pipe are in smooth transition; the sampling tube also comprises a flexible lath which is used for penetrating the sampling tube and blocking the inner diameter reducing part.
The round transition here means that the inner angle part of the step generated at the diameter reduction part is in a circular arc shape. When the flexible batten is used, the flexible batten penetrates through the tail opening of the sampling tube and moves by being attached to the inner wall of the sampling tube, so that the flexible batten is guided to the inner diameter reducing part of the plugging by the arc of the inner angle.
Preferably, the inner diameter reducing part and the inner wall of the sampling pipe are in smooth transition; and a flexible needle for penetrating the sampling tube and penetrating the sample in the reduced inner diameter portion.
The flexible needle tail part pointed by the flexible needle can be fixed with the sampling tube in various forms, and after the flexible needle extends into and is fixed, the flexible needle head realizes the purpose of relatively fixing the sample by penetrating the sample.
The term "flexible" in the terms "flexible strip" and "flexible needle" means that it maintains a stable configuration during insertion and is deformed to turn to extend in the direction of the guided direction when passing through the inner corner portion, and the specific material may be metal, rubber, plastic sheet, etc. in a conventional manner known in the art.
Preferably, the tail end of the outer sleeve is provided with a holding block protruding towards the outer sleeve.
Preferably, the tail end of the sampling tube is provided with a holding block protruding towards the outside of the tube.
By arranging the serrated edge opening, the sampling tube can realize abrasive cutting and sampling in the vertebral body. The outer diameter reducing part is slightly smaller than the outer diameter of the outer sleeve, so that the outer sleeve can be conveniently placed into a vertebral body through a vertebral pedicle cavity. The rotating thread on the inner side surface of the sampling end can guide the bone tissue sample into the tube cavity and increase the friction force of the bone tissue sample when the sampling tube is pulled out.
Through the setting of scale, can judge the degree of depth that sampling tube, outer tube got into the centrum, avoid the degree of depth too dark too shallow sampling failure problem that causes.
Through the internal diameter reducing, when the sampling tube is pulled out, the step formed by reducing can be used for preventing the bone tissue sample from being pulled out.
Through the arrangement of the flexible lath or the flexible needle, the bone tissue sliding off when the sampling tube is pulled out can be reduced.
Through setting up and controlling the piece, make things convenient for rotation in the art, angle regulation and placing, also make things convenient for simultaneously cooperation screw thread and cockscomb structure bead to operate.
The beneficial effects of the utility model are that when letting the bone tissue be convenient for more draw, promoted the sample success rate.
Drawings
FIG. 1 is a schematic view of a sampling tube coupled with a flexible needle in a biopsy device for vertebral bone according to the present invention;
FIG. 2 is a schematic view of the outer sleeve of the biopsy device for vertebral bone according to the present invention;
FIG. 3 is a schematic view of the biopsy device set of the present invention;
wherein:
1-sampling tube 11-sampling end bead 12-threaded section
13-inner diameter reducing part 2-outer sleeve 21-outer diameter reducing part
3-scale 4-holding block 5-flexible needle
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
A centrum bone biopsy device according to fig. 1 to 3 comprises a sampling tube 1 for receiving a bone tissue sample and an outer sleeve 2 for guiding the sampling tube 1; the sampling end edge opening 11 of the sampling tube 1 is in a sawtooth shape, a threaded section 12 is arranged in the area, close to the sampling end, of the inner wall of the sampling tube 1, and other areas of the inner wall of the sampling tube 1 are smooth surfaces; the top end of the outer sleeve 2 is provided with an outer diameter reducing part 21 for penetrating into the cavity of the pedicle of vertebral arch.
The area of the sampling tube 1 close to the sampling end is provided with an inner diameter reducing part 13. The threaded section 12 is located in the inner diameter reduction 13. The inner diameter reducing part 13 and the inner wall of the sampling tube 1 are in smooth transition. Similarly, the tail end of the sampling tube 1 is provided with a holding block 4 protruding towards the outside of the tube.
Also included is a flexible needle 5 for penetrating the sampling tube 1 and penetrating the sample in the reduced inner diameter portion 13. (the figures do not show a specific example of a flexible strip for passing through the sampling tube 1 and blocking the reduced internal diameter portion 13, but the person skilled in the art will understand the form of construction by way of description)
From another perspective, the vertebral bone biopsy device of this embodiment includes an outer cannula 2 and a sampling tube 1. The outer tube 2 is provided with a holding piece 4, a scale 3, and an outer diameter reducing portion 21. The sampling tube 1 is provided with a holding block 4, a scale 3, a sampling end bead 11, a threaded section 12 and a flexible needle 5 (which can be replaced by a flexible plate).
The handle block 4 of the outer sleeve 2 is convenient for rotationally placing the outer sleeve 2 in the operation; the tube body is provided with scales 3 which guide the depth of the outer sleeve 2 entering the vertebral body; the external diameter reducing part 21 at the top end has a slightly smaller external diameter relative to the external diameter of the tube body, so that the outer sleeve 2 can be conveniently placed into the vertebral body through the pedicle cavity. The inner of the outer sleeve 2 is a tube cavity for placing the sampling tube 1.
The handle block 4 of the sampling tube 1 is convenient for rotationally placing the sampling tube 1 in the operation; the lumen of the sampling tube 1 can accommodate a bone tissue sample; the body of the sampling tube is provided with scales 3, so that the depth of the sampling tube 1 entering the vertebral body can be conveniently judged. The serrated mouth of the sampling end bead 11 helps the sampling tube 1 to sample in the vertebral body. The 13 internal diameters of internal diameter undergauge portion of this sample end are less than its body internal diameter to reduce the lumen and to the sampling resistance of bone tissue sample, can also increase the stopping to the bone tissue sample when extracting sampling tube 1. The inside of the inner diameter reducing part 13 is provided with a rotary thread section 12 on the inner side surface of the sampling end, which can guide a bone tissue sample into a tube cavity and increase the friction force of the bone tissue sample when the sampling tube 1 is pulled out. The appearance of the flexible needle 5 is needle-like, before the sampling tube 1 is pulled out, the tail part of the flexible needle 5 is pressed downwards, the needle head of the flexible needle 5 pierces the bone tissue sample, and the bone tissue sliding is reduced when the sampling tube 1 is pulled out.
The working process of the embodiment is as follows:
step 1: the pedicle of the vertebral arch of the target vertebral body is well positioned, the outer sleeve 2 is held by a hand to hold the holding block 4 and rotate, the head end of the outer sleeve 2 is ensured to enter the vertebral body through the pedicle of the vertebral arch, the scale 3 on the pipe body is observed, and when the head end of the outer sleeve 2 exceeds the rear wall of the vertebral body, the outer sleeve holding block 1 stops rotating.
Step 2: the sampling tube 1 is placed in the cavity of the outer sleeve 2, the scale 3 of the tube body of the sampling tube 1 is observed, and when the edge port 11 of the sampling end exceeds the head end of the outer sleeve 2 by about 1-1.5cm, the holding block 4 of the sampling tube 1 is rotated. Then, the flexible needle 5 is pushed down, and the sampling tube 1 is pulled out by the holding block 4, so that the bone tissue specimen is left in the sampling tube 1.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, and that various changes and modifications may be made, which are within the scope of the appended claims.
Claims (8)
1. A centrum bone biopsy device is characterized by comprising a sampling tube for accommodating a bone tissue sample and an outer sleeve for guiding the sampling tube; the sampling end edge opening of the sampling tube is in a sawtooth shape, and a threaded section is arranged in the area, close to the sampling end, of the inner wall of the sampling tube; the top end of the outer sleeve is provided with an outer diameter reducing part for penetrating into the pedicle cavity.
2. The apparatus of claim 1, wherein the outer cannula and the sampling tube are axially graduated.
3. The apparatus of claim 1, wherein the sampling tube has a reduced inner diameter portion in a region adjacent the sampling end.
4. The vertebral bone biopsy device of claim 3, wherein the threaded segment is located in the reduced inner diameter portion.
5. The vertebral bone biopsy device of claim 3, wherein the reduced inner diameter portion is rounded off to the inner wall of the sampling tube; the sampling tube also comprises a flexible lath which is used for penetrating the sampling tube and blocking the inner diameter reducing part.
6. The vertebral bone biopsy device of claim 3, wherein the reduced inner diameter portion is rounded off to the inner wall of the sampling tube; and a flexible needle for penetrating the sampling tube and penetrating the sample in the reduced inner diameter portion.
7. The apparatus of claim 1, wherein the cannula has a holding block protruding from the end of the cannula toward the cannula.
8. The apparatus as claimed in claim 1, wherein the sampling tube has a holding block protruding from the end thereof toward the outside of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021921527.5U CN214017629U (en) | 2020-09-04 | 2020-09-04 | Centrum bone biopsy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021921527.5U CN214017629U (en) | 2020-09-04 | 2020-09-04 | Centrum bone biopsy device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214017629U true CN214017629U (en) | 2021-08-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021921527.5U Active CN214017629U (en) | 2020-09-04 | 2020-09-04 | Centrum bone biopsy device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214017629U (en) |
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2020
- 2020-09-04 CN CN202021921527.5U patent/CN214017629U/en active Active
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