CN218960794U - Circular tube cutting biopsy device - Google Patents
Circular tube cutting biopsy device Download PDFInfo
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- CN218960794U CN218960794U CN202222797553.7U CN202222797553U CN218960794U CN 218960794 U CN218960794 U CN 218960794U CN 202222797553 U CN202222797553 U CN 202222797553U CN 218960794 U CN218960794 U CN 218960794U
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Abstract
The utility model provides a biopsy device is cut off to pipe, includes from interior needle core, interior needle tubing and the outer needle tubing that outside cover was established in proper order, be equipped with the guiding hole on the pipe wall of interior needle tubing, the outer needle tubing fixedly connected with adaptation guiding hole's the cutting blade, the terminal surface that outer needle tubing corresponds cutting blade one end is smooth inclined plane, the inclined plane corresponds cutting blade one side and keeps away from cutting blade one side outwards to protrude and fixed connection cutting blade's both sides limit relatively, the outer fringe on inclined plane and the outer needle tubing both sides outer fringe of cutting blade relatively are the first oblique cutting edge face of chamfer outside. The end face of the outer needle tube corresponding to one end of the cutting blade is of a smooth inclined surface structure, when the outer needle tube axially moves to intercept soft tissues, the outer needle tube is smoother and is not easy to prop against muscle tissues or blood vessel walls, and the outer needle tube smoothly enters the soft tissues along with the incision needle tube, so that damage to the soft tissues caused by movement of the outer needle tube is effectively reduced, and pain of patients is reduced.
Description
Technical Field
The utility model relates to the field of biopsy devices, in particular to a circular tube cutting biopsy device.
Background
Biopsy (biopsy) is abbreviated as "biopsy", also known as surgical pathology, abbreviated as "external examination"; refers to a technique for taking out pathological tissues from a patient body, such as incision, forceps or puncture, and performing pathological examination according to the requirements of diagnosis and treatment.
Disposable biopsy devices are now commonly used in the industry to obtain biopsy tissue from soft tissue such as liver, kidney, prostate, breast, spleen, lymph nodes, or various soft tissue tumors. The existing biopsy device comprises a needle core, an inner needle tube and an outer needle tube which are sequentially sleeved from inside to outside, wherein one end of the outer needle tube is provided with a first cutting blade, after the inner needle tube and the outer needle tube penetrate into tissue to be detected, the tissue to be detected enters the inner needle tube, then the outer needle tube advances along the axial direction of the inner needle tube, the end part of the first cutting blade can enter the inner needle tube from a first guide hole and cut off the tissue to be detected, then the needle core, the inner needle tube and the outer needle tube are all retracted, and the part of the tissue to be detected is reserved in the inner needle tube for biopsy.
However, the end face of the outer needle tube, which corresponds to the first cutting blade, adopts a horizontal mode, and in the process that the outer needle tube moves relative to the inner needle tube in the axial direction, the end face of the outer needle tube can cause certain damage to soft tissues. The prior art discloses a circular tube cutting biopsy device with the application number of 201720589466.9, wherein a cutting blade is a blunt surface, and the cutting biopsy device is basically in a top-breaking mode, so that the cutting efficiency is improved, the technical problems cannot be solved, an empty gun is easily caused, and biopsy tissues cannot be effectively cut.
Disclosure of Invention
In order to solve the problems, the utility model provides a circular tube cutting biopsy device:
the utility model provides a biopsy device is cut off to pipe, includes from interior needle core, interior needle tubing and the outer needle tubing that outside cover was established in proper order, be equipped with the guiding hole on the pipe wall of interior needle tubing, the outer needle tubing fixedly connected with adaptation guiding hole's the cutting blade, the terminal surface that outer needle tubing corresponds cutting blade one end is smooth inclined plane, the inclined plane corresponds cutting blade one side and keeps away from cutting blade one side outwards to protrude and fixed connection cutting blade's both sides limit relatively, the outer fringe on inclined plane and the outer needle tubing both sides outer fringe of cutting blade relatively are the first oblique cutting edge face of chamfer outside.
Preferably, the inclined surface is an inclined cambered surface or an inclined tangent plane. The bevel of the product can be of an arc-shaped bevel structure or of a bevel straight line, and the bevel is similar to the needle head of the existing medical needle.
Preferably, the outer edge contour line of the inclined surface is tangential to the root outer edge contour line of the cutting blade. The technical characteristics have two functions: firstly, the inclined plane is tangent to the cutting blade, so that the joint of the inclined plane and the cutting blade is smoother, and the smooth insertion of the biopsy needle is facilitated; second, original cutting blade is 90 connection with the terminal surface of outer needle tubing, in the in-process of taking biopsy tissue moreover, need be through the guiding hole to cutting blade entering in the needle tubing internal top fracture corresponding tissue, consequently, need ensure cutting blade has certain flexibility, consequently, the in-process that slides in outer needle tubing axial leads to the fact cutting blade to fracture from the junction relatively outer needle tubing fracture easily, and fracture department then causes the further damage to soft tissue easily, easily cause the medical malpractice, the outer fringe on inclined plane of this application and the tangent connection stability between cutting blade and the outer needle tubing that increases of cutting blade outer fringe, can effectively avoid cutting blade fracture from the junction relatively outer needle tubing fracture, outwards crooked slope when avoiding cutting blade at outer needle tubing axial displacement.
Preferably, the outer end of the cutting blade is provided with an arc-shaped cutter cutting end, and the outer edge of the arc-shaped cutter cutting end is provided with a sharp arc-shaped cutter section.
Preferably, the arcuate cutting surface is a second beveled edge surface with a chamfer at the outside. The second inclined cutting edge surface with the chamfer angle outside enables the arc-shaped knife cutting end to be closely attached to the inner needle tube, so that the problem that meat tissue enters a gap between the arc-shaped knife cutting end and the inner needle tube to cause damage to soft tissue or the outward bending of the cutting blade is avoided.
Preferably, the arc-shaped knife cutting end is made of medical stainless steel, the inner tube wall of the inner needle tube is provided with a corresponding guide hole or an arc-shaped magnetic area corresponding to one side of the guide hole, which is close to the outer end of the inner needle tube, and when the cutting blade passes through the guide hole to cut off soft tissues, the arc-shaped knife cutting end at the outer end of the cutting blade and the arc-shaped magnetic area form magnetic attraction adaptation. The arrangement of the arc-shaped magnetic area improves the cutting efficiency of the cutting blade, so that the cutting blade is finally adapted to contact with the arc-shaped magnetic area, perfect cutting of soft tissues is formed, and the existence of residual interruption is avoided.
The beneficial effects are that: the end face of the outer needle tube corresponding to one end of the cutting blade is of a smooth inclined surface structure, when the outer needle tube axially moves to intercept soft tissues, the outer needle tube is smoother and is not easy to prop against muscle tissues or blood vessel walls, and the outer needle tube smoothly enters the soft tissues along with the incision needle tube, so that damage to the soft tissues caused by movement of the outer needle tube is effectively reduced, and pain of patients is reduced. In addition, the protruding areas of the inclined planes of the outer needle tubes are connected with the two side edges of the cutting blade, so that the connection stability of the outer needle tubes and the cutting blade is effectively improved, and the cutting blade is prevented from being broken relative to the outer needle tubes.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1.
Fig. 2 is a schematic cross-sectional view of example 1.
Fig. 3 is a structural view of the outer needle tube of example 1.
Fig. 4 is a side view of the outer needle tube of example 1.
Fig. 5 is an enlarged schematic view of a in fig. 4.
Fig. 6 is a schematic front view of example 1.
Fig. 7 is a partial sectional view of example 2.
Fig. 8 is a schematic side view of example 2.
Reference numerals: 1. a needle core; 2. an inner needle tube; 3. an outer needle tube; 4. a guide hole; 5. a cutting blade; 6. a first beveled edge face; 7. an inclined cambered surface; 8. chamfering; 9. cutting the end by an arc-shaped knife; 10. a second beveled edge face; 11. an arc-shaped magnetic region; 12. soft tissue.
Detailed Description
The utility model will be further described with reference to fig. 1-8 and examples 1-2.
Example 1: the utility model provides a pipe cuts off biopsy device, includes from interior needle core 1, interior needle tubing 2 and the outer needle tubing 3 that outside cover was established in proper order, be equipped with guiding hole 4 on the pipe wall of interior needle tubing 2, outer needle tubing 3 fixedly connected with adaptation guiding hole 4's cutting blade 5.
As shown in fig. 4, the end surface of the outer needle tube 3 corresponding to one end of the cutting blade 5 is a smooth inclined cambered surface 7, one side of the inclined cambered surface 7 corresponding to the cutting blade 5 relatively far away from the cutting blade 5 protrudes outwards and is fixedly connected with two side edges of the cutting blade 5, and the outer edge of the inclined cambered surface 7 and the outer edge of the outer needle tube 3 relatively to the two side edges of the cutting blade 5 are both first inclined blade surfaces 6 with chamfer angles at the outer. In which the conventional cutoff blade 5 is actually installed with a small bent at the end thereof so that the cutoff blade 5 is guided into the guide hole 4, which is a conventional art, and thus, not described in detail herein.
As shown in fig. 6, the outer edge contour of the inclined cambered surface 7 is tangent to the root outer edge contour of the cutoff blade 5. The technical characteristics have two functions: firstly, the inclined cambered surface 7 is tangent to the cutting blade 5, so that the joint of the inclined cambered surface 7 and the cutting blade 5 is smoother, and the smooth insertion of the biopsy needle is facilitated; secondly, original cutting blade 5 is 90 connection with the terminal surface of outer needle tubing 3, and in the in-process of taking biopsy tissue, need get into the interior corresponding tissue of top fracture in needle tubing 2 through guiding hole 4 to cutting blade 5, therefore it has certain flexibility to need to ensure cutting blade 5, consequently, the in-process that outer needle tubing 3 axially slides easily causes cutting blade 5 to fracture from the junction with outer needle tubing 3 fracture, and fracture department then easily causes the further damage to soft tissue 12, easily cause the medical malpractice, the outer fringe of the slope cambered surface 7 of this application is tangent with the outer fringe of cutting blade 5 increases the connection stability between cutting blade 5 and the outer needle tubing 3, can effectively avoid cutting blade 5 to fracture from the junction with outer needle tubing 3 fracture relatively, avoid cutting blade 5 outwards crooked slope when outer needle tubing 3 axial displacement.
As shown in fig. 5, the outer end of the cutting blade 5 is provided with an arc-shaped cutter cutting end 9, and the outer edge of the arc-shaped cutter cutting end 9 is provided with a sharp arc-shaped cutter section. The arcuate cutting surface is a second beveled edge surface 10 with a chamfer at the outside. The second beveled edge surface 10 with the chamfer angle outside enables the arc-shaped knife cutting end 9 to be tightly attached to the inner needle tube 2, so that meat tissue is prevented from entering a gap between the arc-shaped knife cutting end 9 and the inner needle tube 2, and damage to soft tissue 12 or outward bending of the cutting blade 5 is avoided. Compared with the existing pinch-off mode, the cutting mode is higher in efficiency.
Example 2: the utility model provides a pipe cuts off biopsy device, includes from interior needle core 1, interior needle tubing 2 and the outer needle tubing 3 that outside cover was established in proper order, be equipped with guiding hole 4 on the pipe wall of interior needle tubing 2, outer needle tubing 3 fixedly connected with adaptation guiding hole 4's cutting blade 5. As shown in fig. 8, the end surface of the outer needle tube 3 corresponding to one end of the cutting blade 5 is a smooth chamfer surface 8, and one side of the chamfer surface 8 corresponding to the cutting blade 5 is relatively far away from the cutting blade 5 and protrudes outwards and is fixedly connected with two side edges of the cutting blade 5. As shown in fig. 7, the outer edge of the chamfer surface 8 and the outer edges of the two sides of the outer needle tube 3 opposite to the cutting blade 5 are both first chamfer edges 6 with chamfer angles.
The outer edge contour line of the chamfer surface 8 is tangent to the root outer edge contour line of the cutting blade 5. The technical characteristics have two functions: firstly, the bevel 8 is tangent to the cutting blade 5, so that the joint of the bevel 8 and the cutting blade 5 is smoother, and the smooth insertion of the biopsy needle is facilitated; secondly, original cutting blade 5 is 90 connection with the terminal surface of outer needle tubing 3, and in the in-process of taking biopsy tissue, need get into the interior corresponding tissue of top fracture in needle tubing 2 through guiding hole 4 to cutting blade 5, therefore it has certain flexibility to need to ensure cutting blade 5, consequently, the in-process that outer needle tubing 3 axially slides easily causes cutting blade 5 to fracture from the junction with outer needle tubing 3 fracture, and fracture department then easily causes the further damage to soft tissue 12, easily cause the medical malpractice, the tangential stability of connection between cutting blade 5 and outer needle tubing 3 of increase cutting blade 5 of outer fringe of chamfer 8 and cutting blade 5 of this application, can effectively avoid cutting blade 5 fracture from the junction with outer needle tubing 3 fracture relatively, outwards crooked slope when outer needle tubing 3 axial displacement is avoided cutting blade 5.
The outer end of the cutting blade 5 is provided with an arc-shaped cutter cutting end 9, the outer edge of the arc-shaped cutter cutting end 9 is provided with a sharp arc-shaped cutter cutting surface, and the arc-shaped cutter cutting surface is a second inclined cutting surface 10 with a chamfer outside. The second beveled edge surface 10 with the chamfer angle outside enables the arc-shaped knife cutting end 9 to be tightly attached to the inner needle tube 2, so that meat tissue is prevented from entering a gap between the arc-shaped knife cutting end 9 and the inner needle tube 2, and damage to soft tissue 12 or outward bending of the cutting blade 5 is avoided.
As shown in fig. 7, the arc-shaped cutting end 9 is made of medical stainless steel, the inner tube wall of the inner needle tube 2 is provided with a corresponding guide hole 4 or an arc-shaped magnetic area 11 corresponding to one side of the guide hole 4 near the outer end of the inner needle tube 2, and when the cutting blade 5 passes through the guide hole 4 to cut off the soft tissue 12, the arc-shaped cutting end 9 at the outer end of the cutting blade 5 and the arc-shaped magnetic area 11 form magnetic attraction adaptation. The arrangement of the arc-shaped magnetic area 11 improves the cutting efficiency of the cutting blade 5, so that the cutting blade 5 is finally adapted to contact the arc-shaped magnetic area 11, thereby forming perfect cutting of the soft tissue 12 and avoiding the existence of residual interruption.
Operation principle: one end of the outer needle tube 3 is provided with a cutting blade 5, when the inner needle tube 2 and the outer needle tube 3 penetrate into the soft tissue 12 to be detected, the soft tissue 12 to be detected enters the inner needle tube 2, then the outer needle tube 3 advances along the axial direction of the inner needle tube 2, the arc-shaped cutting end 9 of the cutting blade 5 can enter the magnetic attraction adaptive arc-shaped magnetic area 11 in the inner needle tube 2 from the guide hole 4 and cut off the soft tissue 12 to be detected, then the inner needle tube 2 and the outer needle tube 3 in the needle core 1 are all retracted, and the part of the tissue to be detected is left in the inner needle tube 2 for biopsy.
It is apparent that the above examples of the present utility model are merely illustrative of the present utility model and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary or impossible to exemplify all embodiments herein. And obvious changes and modifications which come within the spirit of the utility model are desired to be protected.
Claims (6)
1. The utility model provides a biopsy device is cut off to pipe, includes from interior needle core (1), interior needle tubing (2) and outer needle tubing (3) that outside cover was established in proper order, be equipped with guiding hole (4) on the pipe wall of interior needle tubing (2), outer needle tubing (3) fixedly connected with cutting off blade (5) of adaptation guiding hole (4), its characterized in that: the end face of one end of the outer needle tube (3) corresponding to the cutting blade (5) is a smooth inclined surface, one side of the inclined surface corresponding to the cutting blade (5) relatively far away from the cutting blade (5) protrudes outwards and is fixedly connected with two side edges of the cutting blade (5), and the outer edge of the inclined surface and the outer edge of the two sides of the outer needle tube (3) corresponding to the cutting blade (5) are both first inclined edge surfaces (6) with chamfer angles outside.
2. The tubular cutting biopsy device of claim 1, wherein: the inclined plane is an inclined cambered surface (7) or an inclined tangent plane (8).
3. The tubular cutting biopsy device of claim 1, wherein: the outer edge contour line of the inclined plane is tangent to the root outer edge contour line of the cutting blade (5).
4. The tubular cutting biopsy device of claim 1, wherein: the outer end of the cutting blade (5) is provided with an arc-shaped cutter cutting end (9), and the outer edge of the arc-shaped cutter cutting end (9) is provided with a sharp arc-shaped cutter section.
5. The tubular cutting biopsy device of claim 4, wherein: the arc-shaped cutting surface is a second inclined cutting surface (10) with a chamfer angle outside.
6. The tubular cutting biopsy device of claim 4, wherein: the arc-shaped knife cutting end (9) is made of medical stainless steel, the inner tube wall of the inner needle tube (2) is provided with a corresponding guide hole (4) or an arc-shaped magnetic area (11) corresponding to one side of the guide hole (4) close to the outer end of the inner needle tube (2), and when the cutting blade (5) penetrates through the guide hole (4) to cut off soft tissues (12), the arc-shaped knife cutting end (9) at the outer end of the cutting blade (5) and the arc-shaped magnetic area (11) form magnetic attraction adaptation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222797553.7U CN218960794U (en) | 2022-10-24 | 2022-10-24 | Circular tube cutting biopsy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222797553.7U CN218960794U (en) | 2022-10-24 | 2022-10-24 | Circular tube cutting biopsy device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218960794U true CN218960794U (en) | 2023-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222797553.7U Active CN218960794U (en) | 2022-10-24 | 2022-10-24 | Circular tube cutting biopsy device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218960794U (en) |
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2022
- 2022-10-24 CN CN202222797553.7U patent/CN218960794U/en active Active
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