CN220632127U - Outer knife tube of biopsy sampling needle and biopsy sampling needle - Google Patents
Outer knife tube of biopsy sampling needle and biopsy sampling needle Download PDFInfo
- Publication number
- CN220632127U CN220632127U CN202322063626.4U CN202322063626U CN220632127U CN 220632127 U CN220632127 U CN 220632127U CN 202322063626 U CN202322063626 U CN 202322063626U CN 220632127 U CN220632127 U CN 220632127U
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- China
- Prior art keywords
- cutter tube
- outer cutter
- tube
- cutting edge
- sampling needle
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- 238000005070 sampling Methods 0.000 title claims abstract description 77
- 238000001574 biopsy Methods 0.000 title claims abstract description 40
- 238000010030 laminating Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 210000003195 fascia Anatomy 0.000 abstract description 5
- 210000001519 tissue Anatomy 0.000 description 36
- 206010052428 Wound Diseases 0.000 description 20
- 208000027418 Wounds and injury Diseases 0.000 description 20
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 208000002847 Surgical Wound Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 210000005075 mammary gland Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Abstract
The utility model provides an outer cutter tube of a biopsy sampling needle and the biopsy sampling needle, which belong to the technical field of medical instruments, wherein the outer cutter tube is provided with a head part and a tail part, a sampling groove extending along the length direction of the outer cutter tube is arranged on the outer cutter tube and close to the head part, a continuous cutting edge extending along the length direction of the outer cutter tube is arranged on the edge of the sampling groove extending along the length direction of the outer cutter tube, the cutting edge faces into the sampling groove, the cutting edge comprises a horizontal part and an inclined part protruding out of the horizontal part, and the inclined part is positioned in front of and/or behind the horizontal part in the length direction of the outer cutter tube. According to the utility model, when the inner cutter tube moves in the outer cutter tube along the length direction of the outer cutter tube, the inclined part can cut tissues wound on the inner cutter tube in the moving direction of the inner cutter tube, so that the cutting effect of the cutting edge on the tissues wound on the inner cutter tube is increased, and the overload of the inner cutter tube and the risk of fascia pulling are reduced.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to an outer cutter tube of a biopsy sampling needle and the biopsy sampling needle.
Background
The biopsy needle is widely used in operations such as minimally invasive puncture in mammary gland surgery, and has the advantages of small surgical wound, good healing, small residual knife scar, small damage, quick recovery and the like. When the biopsy needle cuts tissue, the inner knife tube can rotate around the central shaft of the outer knife tube while axially advancing along the outer knife tube. The inner cutter tube rotates in the advancing process, so that the cutting effect of the cutting edge at the front end of the inner cutter tube can be increased, and the cutting efficiency of the biopsy to focus tissues is improved. Currently, there are cases where tissue is entangled on an inner cutter tube when performing rotary biopsy procedures. With the accumulation of wound tissue, the resistance of the inner knife tube in the biopsy needle to rotary cutting increases, resulting in overload of the handle. Meanwhile, if tissues are wound on the inner cutter tube, fascia pulling may be caused when the biopsy needle is taken out, so that the biopsy needle is difficult to take out, and additional damage may be caused to a patient, so that the recovery time of the patient is prolonged.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide an outer tube of a biopsy sampling needle and a biopsy sampling needle, which are used for solving the problems that in the prior art, focal tissue is easy to wind on an inner tube of a biopsy needle.
To achieve the above and other related objects, the present utility model provides an outer cutter tube of a biopsy sampling needle, the outer cutter tube having a head portion and a tail portion, a sampling groove extending in a length direction of the outer cutter tube being provided on the outer cutter tube near the head portion, a continuous cutting edge extending in the length direction of the outer cutter tube being provided on an edge extending in the length direction of the outer cutter tube, the cutting edge facing into the sampling groove, the cutting edge including a horizontal portion and an inclined portion having an inclination angle with respect to the horizontal portion, the inclined portion being located in front of and/or behind the horizontal portion in the length direction of the outer cutter tube.
Optionally, the sampling groove is provided with two cutting edges, and the two cutting edges are oppositely arranged at two sides of the sampling groove respectively.
Optionally, the inclined part extends to the center of the sampling groove along the circumferential direction of the outer cutter tube, so that the opening of the sampling groove corresponding to the inclined part is gradually reduced towards the end part of the sampling groove.
Optionally, the inclined portion and the horizontal portion form a smooth transition therebetween.
Optionally, a puncture head is arranged on the head of the outer cutter tube, and the puncture head faces to the front of the outer cutter tube.
The utility model also provides a biopsy sampling needle which comprises the outer cutter tube and an inner cutter tube sleeved in the outer cutter tube.
Optionally, the blade of outer sword pipe stretches into the sampling groove, just the blade with the surface laminating of inner sword pipe.
Optionally, a cutting edge is arranged on one end of the inner cutter tube corresponding to the head of the outer cutter tube.
Optionally, the cutting edge is annular and disposed about the inner cutter shaft axis.
Optionally, an accommodating groove for accommodating the cutting edge is arranged in the head end of the outer cutter tube.
Optionally, an air hole is formed in the pipe wall of the inner cutter pipe, and the air hole is arranged close to the head end of the outer cutter pipe corresponding to the sampling groove.
As described above, the outer knife tube of the biopsy sampling needle and the biopsy sampling needle have the following beneficial effects: because the edge of the sampling groove is provided with the cutting edge, when the inner cutter tube rotates in the outer cutter tube, the cutting edge can cut tissues wound on the inner cutter tube. The blade includes horizontal part and outstanding in the tilting part of horizontal part, and tilting part department sampling slot narrows, therefore when the interior sword pipe passes through tilting part along the axial motion of outer sword pipe in outer sword pipe, the tilting part cuts the tissue of winding on interior sword pipe in the direction of movement of interior sword pipe, increases the cutting effect of blade to the tissue of winding on interior sword pipe, reduces interior sword pipe overload and fascia and pulls the risk.
The inclined part can be positioned at the front part and/or the rear part of the cutting edge, when the inclined part is positioned at the front part of the cutting edge, the inclined part is beneficial to cutting off tissues wound on the inner cutter tube when the inner cutter tube advances, and when the inclined part is positioned at the rear part of the cutting edge, the inclined part is beneficial to cutting off tissues wound on the inner cutter tube when the inner cutter tube retreats.
Drawings
FIG. 1 is a schematic cross-sectional view of a biopsy needle according to an embodiment of the present utility model.
Fig. 2 is a schematic perspective view of an outer cutter tube according to an embodiment of the present utility model.
Fig. 3 is a schematic side view of the outer cutter tube of fig. 2.
Fig. 4 is a schematic top view of the outer cutter tube of fig. 2.
Fig. 5 is a schematic perspective view of an outer cutter tube according to an embodiment of the present utility model.
Fig. 6 is a schematic side view of the outer cutter tube of fig. 5.
Fig. 7 is a schematic top view of the outer cutter tube of fig. 5.
Fig. 8 is a schematic perspective view of an outer cutter tube according to an embodiment of the present utility model.
Fig. 9 is a schematic side view of the outer cutter tube of fig. 8.
Fig. 10 is a schematic top view of the outer cutter tube of fig. 8.
Reference numerals illustrate: the device comprises an outer cutter tube 1, an inner cutter tube 2, a sampling groove 3, a puncture head 4, an air hole 5, a cutting edge 6, a containing groove 7, an inclined part 8 and a horizontal part 9.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
Referring to fig. 1 to 10, the present embodiment provides an outer cutter tube 1 of a biopsy sampling needle, the outer cutter tube 1 has a head and a tail, a sampling groove 3 is disposed on the outer cutter tube 1 near the head, and the sampling groove 3 extends along the length direction of the outer cutter tube 1. The sampling groove 3 has a continuous cutting edge arranged on the edge extending along the length direction of the outer cutter tube 1, and the cutting edge extends towards the inside of the sampling groove 3 and along the length direction of the outer cutter tube 1. The cutting edge comprises a horizontal portion 9 and an inclined portion 8 having an inclination angle with respect to the horizontal portion 9. The inclined portion 8 is located in front of and/or behind the horizontal portion in the length direction of the outer cutter tube 1.
Since the edge of the sampling slot 3 is provided with a cutting edge, when the inner cutter tube 2 rotates in the outer cutter tube 1, the cutting edge can cut tissues wound on the inner cutter tube 2. Since the inclined portion 8 protrudes from the horizontal portion 9, the sampling groove 3 is narrowed at the inclined portion 8, so that when the inner cutter tube 2 moves axially through the inclined portion 8 in the outer cutter tube 1, the inclined portion 8 can cut the tissue wound on the inner cutter tube 2 in the moving direction of the inner cutter tube 2, the cutting effect of the cutting edge on the tissue wound on the inner cutter tube 2 is increased, and the overload of the driving device of the inner cutter tube 2 and the risk of fascia pulling are reduced.
Specifically, in this embodiment, the inclined portion 8 is inclined from the horizontal portion 9 toward the end portion of the sampling groove 3, which is close to the inclined portion 8, as shown in fig. 2 to 4, and when the inclined portion 8 is located at the front portion of the cutting edge, the inclined portion 8 is an inclined edge with a high front and a low rear, which is beneficial to cutting the tissue wound on the inner cutter tube 2 when the inner cutter tube 2 advances. As shown in fig. 5 to 7, when the inclined portion 8 is located at the rear of the cutting edge, the inclined portion 8 is an inclined edge with a low front and a high rear, which is advantageous in cutting the tissue wound around the inner cutter tube 2 when the inner cutter tube 2 is retreated. As shown in fig. 8-10, in some embodiments, the horizontal portion 9 is located in the middle of the cutting edge and the inclined portion 8 may be located in both the front and rear of the cutting edge. When the inner cutter tube 2 advances or retreats, the inclined part 8 can cut tissues wound on the inner cutter tube 2, so that the cutting efficiency is high.
As shown in fig. 2 to 10, in the present embodiment, the sampling groove 3 has two cutting edges, which are oppositely disposed on both sides of the sampling groove 3, respectively. The two cutting edges can cut the tissues wound on the inner cutter tube 2 at the same time, so that the cutting effect is improved.
Specifically, in the present embodiment, the inclined portion 8 extends in the circumferential direction of the outer cutter tube 1 toward the center of the sampling groove 3, so that the opening of the sampling groove 3 corresponding to the inclined portion 8 is gradually reduced toward the end of the sampling groove 3. After the opening of the sampling groove 3 is reduced, the inclined portion 8 can cut the tissue wound around the inner tube 2 in the axial direction of the inner tube 2 when the inner tube 2 advances or retreats. Meanwhile, the inclined cutting part 8 does not interfere the axial movement of the inner cutter tube 2, and is beneficial to the smooth proceeding of tissue sampling.
In this embodiment, the smooth transition between the inclined portion 8 and the horizontal portion 9 can reduce the abrupt degree of the resistance of the inner cutter tube 2 when the inclined portion 8 cuts the tissue wound on the inner cutter tube 2, so that the resistance change of the inner cutter tube 2 is more gentle, and the overload probability of the power device of the inner cutter tube 2 is reduced.
Specifically, in this embodiment, the head of the outer cutter tube 1 is provided with the piercing head 4, and the piercing head 4 faces the front of the outer cutter tube 1. The puncture head 4 can facilitate the puncture of the biopsy sampling needle.
The embodiment also provides a biopsy sampling needle, which comprises the outer cutter tube 1 and the inner cutter tube 2, wherein the inner cutter tube 2 is sleeved in the outer cutter tube 1.
Specifically, in this embodiment, the inner cutter tube 2 is provided with a cutting blade 6 at an end corresponding to the head of the outer cutter tube 1 for cutting focal tissue. In this embodiment, the cutting edge 6 is annular and is disposed about the axis of the inner cutter tube 2.
In this embodiment, a receiving groove 7 for receiving the cutting edge 6 is provided in the head end of the outer cutter tube 1. When the inner cutter tube 2 moves to the head of the outer cutter tube 1 to the limit position, the cutting edge 6 is accommodated in the accommodating groove 7, so that the cutting edge 6 is prevented from colliding with the head of the outer cutter tube 1, and sharpness of the cutting edge 6 is maintained.
In this embodiment, the pipe wall of the inner cutter pipe 2 is further provided with an air hole 5, and the air hole 5 is disposed near the head end of the outer cutter pipe 1 corresponding to the sampling slot 3. When negative pressure is pumped in the inner cutter tube 2, the air hole 5 can be used for air intake, so that air flow is generated in the inner cutter tube 2, and the tissue sample in the inner cutter tube 2 is pushed to move.
When the biopsy sampling needle is in actual use, the outer cutter tube 1 stretches into focus tissues, the sampling groove 3 aligns with the focus tissues and pumps negative pressure, and under the action of the negative pressure, the focus tissues enter the sampling groove 3. The inner cutter tube 2 moves towards the head of the outer cutter tube 1 in the outer cutter tube 1, and when the inner cutter tube 2 passes through the sampling groove 3, the cutting edge 6 cuts focus tissues to obtain tissue samples. The tissue sample moves in the inner cutter tube 2 under the action of negative pressure until entering the collecting cavity, and the sampling is completed.
In this embodiment, the cutting edge of the outer cutter tube 1 extends into the sampling groove 3, and the cutting edge is attached to the outer surface of the inner cutter tube 2. When the inner cutter tube 2 rotates, the cutting edge can also cut the tissues wound on the inner cutter tube 2, so that the cutting efficiency of the tissues wound on the inner cutter tube 2 is improved.
In summary, according to the outer cutter tube 1 of the biopsy sampling needle and the biopsy sampling needle of the present embodiment, since the edge of the sampling groove 3 is provided with the cutting edge, the cutting edge comprises the horizontal portion 9 and the inclined portion 8 protruding from the horizontal portion 9, and the sampling groove 3 is narrowed at the inclined portion 8, when the inner cutter tube 2 passes through the inclined portion 8 along the axial direction of the outer cutter tube 1 in the outer cutter tube 1, the inclined portion 8 cuts the tissue wound on the inner cutter tube 2 in the moving direction of the inner cutter tube 2, and simultaneously cuts the tissue in the circumferential direction of the inner cutter tube 2, so that the cutting effect of the cutting edge on the tissue wound on the inner cutter tube 2 is increased, and the overload and fascia pulling risk of the inner cutter tube 2 is reduced. The inclined portion 8 may be located at the front and/or rear of the cutting edge, which is advantageous for cutting off tissue wound around the inner cutter tube 2 when the inner cutter tube 2 is closed, when the inclined portion 8 is located at the front of the cutting edge, and for cutting off tissue wound around the inner cutter tube 2 when the inner cutter tube 2 is retracted, when the inclined portion 8 is located at the rear of the cutting edge.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (11)
1. An outer knife tube of a biopsy sampling needle, which is characterized in that: the outer cutter tube is provided with a head part and a tail part, a sampling groove extending along the length direction of the outer cutter tube is formed in the outer cutter tube and close to the head part, a cutting edge extending along the length direction of the outer cutter tube and continuous is formed in the edge extending along the length direction of the outer cutter tube, the cutting edge faces into the sampling groove, the cutting edge comprises a horizontal part and an inclined part with an inclined angle relative to the horizontal part, and the inclined part is positioned in front of and/or behind the horizontal part in the length direction of the outer cutter tube.
2. The outer knife tube of a biopsy sampling needle according to claim 1, wherein: the sampling groove is provided with two cutting edges, and the two cutting edges are oppositely arranged at two sides of the sampling groove respectively.
3. The outer knife tube of a biopsy sampling needle according to claim 2, wherein: the inclined part extends to the center of the sampling groove along the circumferential direction of the outer cutter tube, so that the opening of the sampling groove corresponding to the inclined part is gradually reduced towards the end part of the sampling groove.
4. The outer knife tube of a biopsy sampling needle according to claim 1, wherein: and the inclined part and the horizontal part are smooth.
5. The outer knife tube of a biopsy sampling needle according to claim 1, wherein: the head of the outer cutter tube is provided with a puncture head, and the puncture head faces to the front of the outer cutter tube.
6. A biopsy sampling needle, characterized by: comprising an outer cutter tube according to any one of claims 1 to 5 and an inner cutter tube sleeved in the outer cutter tube.
7. The biopsy sampling needle of claim 6, wherein: the blade of outer sword pipe stretches into the sampling groove, just the blade with the laminating of the surface of interior sword pipe.
8. The biopsy sampling needle of claim 6, wherein: and a cutting edge is arranged at one end of the inner cutter tube, which corresponds to the head part of the outer cutter tube.
9. The biopsy sampling needle of claim 8, wherein: the cutting edge is annular and is arranged around the axis of the inner cutter tube.
10. The biopsy sampling needle of claim 8, wherein: an accommodating groove for accommodating the cutting edge is formed in the head end of the outer cutter tube.
11. The biopsy sampling needle of claim 6, wherein: and air holes are formed in the pipe wall of the inner cutter pipe, and the air holes are arranged close to the head end of the outer cutter pipe corresponding to the sampling grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322063626.4U CN220632127U (en) | 2023-07-31 | 2023-07-31 | Outer knife tube of biopsy sampling needle and biopsy sampling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322063626.4U CN220632127U (en) | 2023-07-31 | 2023-07-31 | Outer knife tube of biopsy sampling needle and biopsy sampling needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220632127U true CN220632127U (en) | 2024-03-22 |
Family
ID=90262641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322063626.4U Active CN220632127U (en) | 2023-07-31 | 2023-07-31 | Outer knife tube of biopsy sampling needle and biopsy sampling needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220632127U (en) |
-
2023
- 2023-07-31 CN CN202322063626.4U patent/CN220632127U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |