CN214074655U - Adjustable peritoneal dialysis catheter tunnel needle - Google Patents
Adjustable peritoneal dialysis catheter tunnel needle Download PDFInfo
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- CN214074655U CN214074655U CN202022344548.1U CN202022344548U CN214074655U CN 214074655 U CN214074655 U CN 214074655U CN 202022344548 U CN202022344548 U CN 202022344548U CN 214074655 U CN214074655 U CN 214074655U
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- needle body
- needle
- peritoneal dialysis
- tunnel
- dialysis catheter
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Abstract
The utility model discloses an adjustable peritoneal dialysis catheter tunnel needle, which comprises a needle body, wherein the needle body is a hollow tubular body with openings at two ends, and the head part of the needle body is a smooth tip; the tail of the needle body is clamped with a rotating part, and the rotating part is connected with a screw rod extending into the needle body; the needle body is embedded with a supporting part and a spine part connected with the supporting part, a threaded hole matched with the screw rod is arranged in the supporting part, and the spine part can extend out of the head of the needle body. The utility model discloses a tunnel needle can hide spine portion when puncturing subcutaneous tissue, only just stretches out spine portion when puncturing skin top layer, can better protect subcutaneous tissue.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to peritoneal dialysis puts pipe tunnel needle with adjustable.
Background
Currently, in clinic peritoneal dialysis catheterization for chronic renal failure patients, a tunnel needle is used to guide a catheter to penetrate through subcutaneous tissues, be fixed in an arc shape and then penetrate out of the skin. The tunnel needle requires little damage to subcutaneous tissues, is convenient to operate and is not easy to bring skin bacteria to deep tissues. The existing tunnel needle body is an arc cylinder, the front part of the existing tunnel needle body is of a cone-tip structure, and the peritoneal dialysis catheter is directly sleeved on the spiral structure part at the rear end part of the cylinder and is pulled out from the tunnel through the tunnel needle clinically. CN204246570U discloses peritoneal dialysis tunnel needle of handle can be dismantled in area, including needle point, curved part needle bar, straight part needle bar and the fixed slot that once sets up, still including establishing at straight part needle bar and fixed slot outlying handle, be equipped with a plurality of archs on the surface of this handle. The needle point part of the tunnel needle is blunt, so the loss to subcutaneous tissue is small, but the resistance is large when the tunnel needle penetrates out of skin, and the loss to the skin at the tunnel entrance is large.
Disclosure of Invention
The utility model aims to solve the technical problem that an adjustable peritoneal dialysis puts a pipe tunnel needle that reduces subcutaneous tissue loss risk and does benefit to wearing out skin is provided.
The technical scheme provided by the utility model is to provide an adjustable peritoneal dialysis catheter tunnel needle, which comprises a needle body, wherein the needle body is a hollow tube with openings at two ends, and the head of the needle body is a smooth tip; the tail of the needle body is clamped with a rotating part, and the rotating part is connected with a screw rod extending into the needle body; the needle body embeds supporting part and the spine portion that links to each other with the supporting part, establishes in the supporting part and has the screw hole that suits with the screw rod, spine portion protractile needle body head.
The rotary part joint drives the screw rod rotatory in the screw hole of supporting part at the needle body afterbody, through clockwise rotation rotary part to promote the supporting part to remove to the needle body head, and then promote the spine portion on the supporting part and stretch out the needle body head. On the contrary, the rotating component is rotated anticlockwise, the supporting part is pulled to move towards the tail of the needle body, and then the spine part on the supporting part is pulled to be retracted into the needle body. When the tunnel needle is used, the rotating component is rotated anticlockwise, the sharp part is retracted into the needle body, the smooth sharp end of the tunnel needle can penetrate through subcutaneous tissues, and the subcutaneous tissues cannot be damaged; when the needle head of the tunnel reaches the skin outer surface layer, the smooth sharp end is difficult to pierce the skin outer surface layer, at the moment, the rotating component is rotated clockwise to push the sharp part to extend out of the needle body head, and the sharp part is sharp enough to pierce the skin outer surface layer quickly.
The inner wall of the tail of the needle body is provided with an annular flange, and the outer wall of the rotating component is provided with a groove matched with the annular flange. The rotating part is firmly clamped at the tail part of the needle body through the matching of the groove and the annular flange at the tail part of the needle body.
The outer diameter of the rotating part is the same as the inner diameter of the tail part of the needle body. Therefore, the resistance of the tunnel needle in the puncture process can be reduced, the damage of the tunnel to subcutaneous tissues can be reduced, and the tunnel needle is favorable for penetrating out of the skin.
The outer diameter of the supporting part is adapted to the inner diameter of the needle body. The external diameter and the needle body internal diameter of supporting part suit, and the supporting part is more stable at the removal in-process to play the effect of stabilizing spine portion, the tunnel needle puncture in-process is difficult for rocking, and the puncture effect is better, and is little to the skin damage.
The terminal surface that rotary part kept away from the screw rod is equipped with the arch, and this bellied lateral wall is equipped with the screw thread. The raised thread side wall can be used for connecting a dialysis implanted tube, and can increase the friction force with the peritoneal dialysis catheter, thereby avoiding the falling off of the peritoneal dialysis catheter in the puncture process.
The utility model discloses a tunnel needle can hide spine portion when the puncture subcutaneous tissue, only just stretches out spine portion when the puncture skin, can better protect subcutaneous tissue and do benefit to and wear out skin, alleviates patient's misery.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
the reference numbers in the figures are: 1. a needle body; 2. a rotating member; 3. a screw; 4. a support portion; 5. a spike portion; 6. a threaded hole; 7. an annular flange; 8. a groove; 9. and (4) protruding.
Detailed Description
The following examples are further illustrative of the present invention with reference to the accompanying drawings, but are not intended to limit the present invention.
As shown in fig. 1, an adjustable peritoneal dialysis catheter tunnel needle comprises a needle body 1, wherein the needle body 1 is a hollow tube with two open ends, and the head of the needle body is a smooth tip; the tail part of the needle body 1 is clamped with a rotating part 2, and the rotating part 2 is connected with a screw rod 3 extending into the needle body 1; the needle body 1 is embedded with a support part 4 and a spine part 5 connected with the support part 4, a threaded hole 6 matched with the screw rod 3 is arranged in the support part 4, and the spine part 5 can extend out of the head part of the needle body 4.
The rotary part 2 joint is at 1 afterbody of needle body, through clockwise rotation rotary part 2, drives screw rod 3 rotatory in the screw hole 6 of supporting part 4 to promote supporting part 4 and remove to 1 head of needle body, and then promote spine portion 5 on the supporting part 4 and stretch out 1 head of needle body. Conversely, the rotating component 2 is rotated counterclockwise, the supporting part 4 is pulled to move towards the tail of the needle body 1, and the spine part 5 on the supporting part 4 is pulled to retract into the needle body 1. When the tunnel needle is used, the rotating component 2 is rotated anticlockwise, the spine part 5 is retracted into the needle body 1, and the needle head of the tunnel needle can sufficiently penetrate through subcutaneous tissues and cannot damage the subcutaneous tissues; when the needle head of the tunnel reaches the skin outer surface layer, the smooth tip is difficult to puncture the skin outer surface layer, the rotating component 2 is rotated clockwise at the moment, the sharp point part 5 is pushed to extend out of the head part of the needle body 1, and the sharp point part 5 is sharp enough to puncture the skin outer surface layer quickly.
The inner wall of the tail part of the needle body 1 is provided with an annular flange 7, and the outer wall of the rotating part 2 is provided with a groove 8 matched with the annular flange 7. The rotating part 2 is firmly clamped at the tail part of the needle body 1 through the matching of the groove 8 and the annular flange 7 at the tail part of the needle body 1.
The outer diameter of the rotating part 2 is the same as the inner diameter of the tail part of the needle body 1. Therefore, the resistance of the tunnel needle in the puncture process can be reduced, and the damage of the tunnel to subcutaneous tissues can also be reduced.
The outer diameter of the support part 4 is adapted to the inner diameter of the needle body 1. The external diameter of supporting part 4 suits with 4 internal diameters of needle body, and supporting part 4 is more stable at the removal in-process to play the effect of stabilizing spine portion 5, the tunnel needle puncture in-process is difficult for rocking, and the puncture effect is better, and is little to the skin damage.
The end face, far away from the screw rod, of the rotating part 2 is provided with a protrusion 9, and the side wall of the protrusion 9 is provided with threads. The thread-shaped side wall of the protrusion 9 can be used for connecting the peritoneal dialysis catheter, and can increase the friction force with the peritoneal dialysis catheter, thereby avoiding the falling off of the peritoneal dialysis catheter in the puncture process.
Claims (5)
1. Adjustable peritoneal dialysis catheter tunnel needle, which comprises a needle body and is characterized in that: the needle body is a hollow tube with two open ends, and the head of the needle body is a smooth tip; the tail of the needle body is clamped with a rotating part, and the rotating part is connected with a screw rod extending into the needle body;
the needle body is embedded with a supporting part and a spine part connected with the supporting part, a threaded hole matched with the screw rod is arranged in the supporting part, and the spine part can extend out of the head of the needle body.
2. The adjustable peritoneal dialysis catheter tunnel needle of claim 1, wherein: the inner wall of the tail of the needle body is provided with an annular flange, and the outer wall of the rotating component is provided with a groove matched with the annular flange.
3. The adjustable peritoneal dialysis catheter tunnel needle of claim 1, wherein: the outer diameter of the rotating part is the same as the inner diameter of the tail part of the needle body.
4. The adjustable peritoneal dialysis catheter tunnel needle of claim 1, wherein: the outer diameter of the supporting part is adapted to the inner diameter of the needle body.
5. The adjustable peritoneal dialysis catheter tunnel needle of claim 1, wherein: the terminal surface that rotary part kept away from the screw rod is equipped with the arch, and this bellied lateral wall is equipped with the screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022344548.1U CN214074655U (en) | 2020-10-20 | 2020-10-20 | Adjustable peritoneal dialysis catheter tunnel needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022344548.1U CN214074655U (en) | 2020-10-20 | 2020-10-20 | Adjustable peritoneal dialysis catheter tunnel needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214074655U true CN214074655U (en) | 2021-08-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022344548.1U Active CN214074655U (en) | 2020-10-20 | 2020-10-20 | Adjustable peritoneal dialysis catheter tunnel needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214074655U (en) |
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2020
- 2020-10-20 CN CN202022344548.1U patent/CN214074655U/en active Active
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