CN215078970U - Sampling needle structure - Google Patents
Sampling needle structure Download PDFInfo
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- CN215078970U CN215078970U CN202023188474.3U CN202023188474U CN215078970U CN 215078970 U CN215078970 U CN 215078970U CN 202023188474 U CN202023188474 U CN 202023188474U CN 215078970 U CN215078970 U CN 215078970U
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- needle tube
- needle
- well
- interior
- tube
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Abstract
The utility model discloses a sampling needle structure, including outer needle tube subassembly, well needle tube subassembly and interior needle tube subassembly, outer needle tube subassembly includes outer needle tube, well needle tube subassembly includes well needle tube, interior needle tube subassembly includes interior needle tube, open the side of outer needle tube has outer needle tube notch, well needle tube cartridge is in outer needle tube, well needle tube is located also open well needle tube notch under the outer needle tube notch, well needle tube notch has at least one side to be provided with the cutting sword, interior needle tube is solid needle body, interior needle tube cartridge is intraductal in well needle, interior needle tube core can be in free motion on well needle tube length direction, well needle tube can be rotatory under the drive of driving medium. The utility model discloses lie in using "three pipe" structures for the difference of current sampling needle structure, the backward motion of interior nook closing member produces the negative pressure, will treat that the sample tissue inhales well needle intraductally, and the cutting is accomplished in the rotation of well needle pipe, and whole sampling process takes place intraductally in well needle like this, and no exposed relative linear motion of nook closing member needle tubing has reduced the possibility of bleeding in having avoided the patient even, has reduced the operation risk and has handled the degree of difficulty.
Description
Technical Field
The utility model relates to the field of medical equipment, specifically be a sampling needle structure.
Background
The disposable medical biopsy needle used in the hospital at present has several types, namely a groove type biopsy needle, a tube type biopsy needle and a suction type biopsy needle. The groove type sampling tissue is in a half-pipe half-cylinder strip shape, so that the sampling quantity is relatively small, and the shape is not complete enough. The tubular sampling tissue is full tubular cylinder shape, the sampling amount is relatively large, but internal bleeding can be caused when the puncture cutting is carried out. The suction type is only suitable for taking pus-like tissue. The above three biopsy needles may cause internal bleeding of a patient during sampling due to the relative linear motion of the needle core and the exposed needle tube at the head during puncturing, thereby increasing the risk of operation and the difficulty of handling.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sampling needle structure to solve the technical problem who proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model discloses a sampling needle structure, including outer needle tube subassembly, well needle tube subassembly and interior needle tube subassembly, outer needle tube subassembly includes outer needle tube, well needle tube subassembly includes well needle tube, interior needle tube subassembly includes interior needle tube, open the side of outer needle tube has outer needle tube notch, well needle tube cartridge is in outer needle tube, well needle tube is located also open well needle tube notch under the outer needle tube notch, well needle tube notch has at least one side to be provided with the cutting sword, interior needle tube is solid needle body, interior needle tube cartridge is intraductal in well needle, interior needle tube core can be in free motion on well needle tube length direction, well needle tube can be rotatory under the drive of driving medium.
Description of the sampling procedure: when the inner needle core moves rapidly towards one end far away from the head of the middle needle tube, negative pressure is generated in the middle needle tube and is transmitted to the notch of the needle tube, the biopsy tissue is sucked into the middle needle tube at the moment, the middle needle tube is driven by the transmission assembly to complete a circle of rotation and cutting actions, the sampling is completed at the moment, and the needle head can be pulled out from the body.
The utility model discloses further improve: the outer needle tube assembly further comprises an outer needle tube fixing piece, the tail end of the outer needle tube is fixedly arranged in the outer needle tube fixing piece, the middle needle tube assembly further comprises a middle needle tube fixing piece, the tail end of the middle needle tube is fixedly arranged in the middle needle tube fixing piece, a circular groove is formed in the tail end of the middle needle tube fixing piece, a sealing ring can be arranged in the circular groove, so that negative pressure is not weakened when a fit clearance between the inner needle core and the middle needle tube is conducted to the notch, the inner needle core assembly further comprises a push rod, and the tail end of the inner needle core is fixedly connected with the push rod.
The utility model discloses further improve: the cutting angle of the cutting edge is not less than 45 degrees.
The utility model discloses further improve: the head of the inner needle core can be a bevel surface, a straight surface, a triangular surface and the like.
Instructions for use: the push rod slides backwards quickly, the generated negative pressure passes through the fit clearance between the middle needle tube and the inner needle core, the negative pressure is transmitted to the notch of the needle tube, and obvious suction force can be generated to suck the biopsy tissue into the middle needle tube; and (5) rotationally cutting the middle needle tube to finish sampling.
The utility model discloses lie in using "three pipe" structures for the difference of current sampling needle structure, the backward motion of interior nook closing member produces the negative pressure, will treat that the sample tissue inhales well needle intraductally, and the cutting is accomplished in the rotation of well needle pipe, and whole sampling process takes place intraductally in well needle like this, and no exposed relative linear motion of nook closing member needle tubing has reduced the possibility of bleeding in having avoided the patient even, has reduced the operation risk and has handled the degree of difficulty.
Drawings
Fig. 1 is a schematic structural view of a sampling needle according to the present invention;
FIG. 2 is a schematic cross-sectional view of the outer needle assembly;
FIG. 3 is a schematic view of a needle cannula assembly;
FIG. 4 is a schematic view of the structure A-A of FIG. 3;
FIG. 5 is a schematic view of the structure B-B in FIG. 3;
FIG. 6 is a schematic structural view of an inner needle hub assembly;
FIG. 7 is a schematic view of the initial state of the outer needle tube, the middle needle tube and the inner needle core;
FIG. 8 is a schematic cross-sectional view of FIG. 7;
FIG. 9 is a schematic view of the structure of the outer needle cannula with the middle needle cannula aligned;
FIG. 10 is a schematic cross-sectional view of FIG. 9;
FIG. 11 is a schematic view of the structure of the middle needle tube cutting the tissue to be sampled;
fig. 12 is a schematic sectional view of fig. 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Please refer to fig. 1-12, the utility model discloses a sampling needle structure, including outer needle tube subassembly, well needle tube subassembly and interior needle assembly, outer needle tube subassembly includes outer needle tube 1, well needle tube subassembly includes well needle tube 2, interior needle assembly includes interior needle core 3, open the side of outer needle tube 1 has outer needle tube notch 11, well needle tube 2 cartridge is in outer needle tube 1, well needle tube 2 is located also open well needle tube notch 21 under outer needle tube notch 11, well needle tube notch 21 has at least one side to be provided with cutting edge 22, interior needle core 3 is solid needle body, 3 cartridges of interior needle core are in well needle tube 2, interior needle core 3 can be in the free motion of well needle tube 2 length direction, well needle tube 2 can be rotatory under the drive of driving medium (not shown in the figure).
Description of the sampling procedure: when the inner needle core 3 moves rapidly towards one end far away from the head of the middle needle tube 2, negative pressure is generated in the middle needle tube 2 and is transmitted to the notch of the middle needle tube, the biopsy tissue is sucked into the middle needle tube 2 at the moment, the middle needle tube 2 is driven by the transmission assembly to complete a circle of rotation and cutting actions, the sampling is completed at the moment, and the needle head can be pulled out from the body.
The utility model discloses further improve: the outer needle tube assembly further comprises an outer needle tube fixing piece 4, the tail end of the outer needle tube 1 is fixedly arranged in the outer needle tube fixing piece 4, the middle needle tube assembly further comprises a middle needle tube fixing piece 5, the tail end of the middle needle tube 2 is fixedly arranged in the middle needle tube fixing piece 5, a circular groove 51 is formed in the tail end of the middle needle tube fixing piece 5, a sealing ring can be arranged in the circular groove 51, so that negative pressure is not weakened when the fit clearance between the inner needle core 3 and the middle needle tube 2 is conducted to a notch, the inner needle core assembly further comprises a push rod 6, and the tail end of the inner needle core 3 is fixedly connected with the push rod 6.
The utility model discloses further improve: the cutting angle of the cutting edge 22 is not less than 45 °.
Instructions for use: the push rod 6 slides backwards quickly, the generated negative pressure passes through the matching gap between the middle needle tube 2 and the inner needle core 3, the negative pressure is transmitted to the notch of the middle needle tube, and obvious suction can be generated to suck the biopsy tissue into the middle needle tube 2; and (5) performing rotary cutting on the middle needle tube 2 to finish sampling.
The utility model discloses further improve: the head of the inner needle core 3 can be a bevel surface, a straight surface, a triangular surface and the like.
The utility model discloses lie in using "three pipe" structures for the difference of current sampling needle structure, the backward motion of interior nook closing member 3 produces the negative pressure, will treat sample tissue and inhale in needle tubing 2, the cutting is accomplished in the rotation of needle tubing 2, whole sampling process takes place in needle tubing 2 like this, does not have the relative linear motion that the needle tubing exposes, has reduced the possibility of having avoided bleeding in the patient even, has reduced the operation risk and has handled the degree of difficulty.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. A sampling needle structure which is characterized in that: including outer needle tube subassembly, well needle tube subassembly and interior needle tube subassembly, outer needle tube subassembly includes outer needle tube, well needle tube subassembly includes well needle tube, interior needle tube subassembly includes interior needle tube, open the side of outer needle tube has outer needle tube notch, well needle tube cartridge is in outer needle tube, well needle tube is located also open well needle tube notch under the outer needle tube notch, well needle tube notch has at least one side to be provided with the cutting sword, interior needle tube is solid needle body, interior needle tube cartridge is intraductal in well needle, interior needle tube can be in the free motion of well needle tube length direction, well needle tube can be rotatory under the drive of driving medium.
2. A sampling needle structure according to claim 1, wherein: the outer needle tube assembly further comprises an outer needle tube fixing piece, the tail end of the outer needle tube is fixedly arranged in the outer needle tube fixing piece, the middle needle tube assembly further comprises a middle needle tube fixing piece, the tail end of the middle needle tube is fixedly arranged in the middle needle tube fixing piece, a circular groove is formed in the tail end of the middle needle tube fixing piece, a sealing ring can be arranged in the circular groove, the inner needle tube assembly further comprises a push rod, and the tail end of the inner needle core is fixedly connected with the push rod.
3. A sampling needle structure according to claim 1, wherein: the cutting angle of the cutting edge is not less than 45 degrees.
4. A sampling needle structure according to claim 1, wherein: the head of the inner needle core is an inclined plane, a straight plane or a triangular plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023188474.3U CN215078970U (en) | 2020-12-26 | 2020-12-26 | Sampling needle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023188474.3U CN215078970U (en) | 2020-12-26 | 2020-12-26 | Sampling needle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215078970U true CN215078970U (en) | 2021-12-10 |
Family
ID=79308308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023188474.3U Active CN215078970U (en) | 2020-12-26 | 2020-12-26 | Sampling needle structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215078970U (en) |
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2020
- 2020-12-26 CN CN202023188474.3U patent/CN215078970U/en active Active
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