CN220370045U - Double-cavity backflow-preventing arteriovenous puncture needle - Google Patents
Double-cavity backflow-preventing arteriovenous puncture needle Download PDFInfo
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- CN220370045U CN220370045U CN202321494620.6U CN202321494620U CN220370045U CN 220370045 U CN220370045 U CN 220370045U CN 202321494620 U CN202321494620 U CN 202321494620U CN 220370045 U CN220370045 U CN 220370045U
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- 230000000151 anti-reflux effect Effects 0.000 claims description 12
- 210000004204 blood vessel Anatomy 0.000 abstract description 31
- 238000000034 method Methods 0.000 abstract description 9
- 239000008280 blood Substances 0.000 description 15
- 210000004369 blood Anatomy 0.000 description 15
- 230000017531 blood circulation Effects 0.000 description 4
- 230000001788 irregular Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model discloses a double-cavity backflow-preventing arteriovenous puncture needle, which comprises an indwelling sheath tube and a puncture needle inner core; the inner cavity of the puncture needle inner core is provided with a cylindrical pipe, one side of the cylindrical pipe is connected with the inner wall of the puncture needle inner core into a whole, and the inner cavity of the puncture needle inner core is divided into a needle core B cavity positioned at the inner side of the cylindrical pipe and a needle core A cavity positioned at the outer side of the cylindrical pipe through the cylindrical pipe; the end of the cylindrical tube head is closed with a tail end opening, a needle core B cavity opening which is communicated with the outside of the puncture needle inner core and the inside of the needle core B cavity is formed in the joint of the cylindrical tube head and the inner wall of the puncture needle inner core along the radial direction, and the needle core B cavity opening is flush with the head end position of the indwelling sheath tube when in work; the head end of the needle core A cavity is the head tip of the puncture needle core, and the tail end of the needle core A cavity is the tail end of the puncture needle core, so that the needle core A cavity is communicated from the head tip of the puncture needle core to the tail end of the puncture needle core. The method aims at finding a convenient indication standard capable of clearly judging the indwelling sheath in the blood vessel, simplifying the puncture tube placing step and reducing the tube placing difficulty.
Description
Technical Field
The utility model relates to medical auxiliary equipment, in particular to a double-cavity backflow-preventing arteriovenous puncture needle.
Background
The arteriovenous puncture technique is widely applied in clinical medical treatment, and the current arteriovenous puncture needles are single-cavity puncture needles. The single-cavity arteriovenous puncture needle lacks a convenient judgment method for judging whether the outer sheath tube is placed in a blood vessel or not during arteriovenous puncture because the outer indwelling sheath tube and the front end of the needle core are not on the same plane, and has higher requirements on puncture technology. In particular, in arterial puncture catheterization, whether it is a direct method or a penetration method, there are often problems such as "the needle core is not in (arterial) sheath" and "the needle core is not in (arterial) sheath nor in (arterial)", which may cause difficulty in clinical arteriovenous puncture.
The traditional single-cavity anti-backflow arteriovenous puncture needle is shown in figures 1, 2 and 3 and comprises an indwelling sheath tube 1 and a single-cavity puncture needle inner core 5. In operation, as shown in fig. 4, a, the head end of the needle core is positioned in a blood vessel, the head end of the indwelling sheath tube is positioned in the blood vessel, and the tube placement is successful; b. the head end of the needle core is positioned in a blood vessel, the head end of the indwelling sheath tube is not positioned in the blood vessel, and the tube placement is unsuccessful; c. the head end of the needle core is not in the blood vessel, the head end of the indwelling sheath tube is not in the blood vessel, and the tube placement is unsuccessful.
Because the front ends of the needle core and the indwelling sheath tube are not in the same plane, the 'whether the needle core is in the blood vessel' and the 'whether the indwelling sheath tube is in the blood vessel' are not necessarily connected, namely, the blood return at the tail end of the needle core cannot be used as an effective indication that the indwelling sheath tube can be placed in the blood vessel, the puncture tube placing difficulty is increased, and the success rate is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a double-cavity backflow-preventing arteriovenous puncture needle, which aims to find a convenient indication standard capable of clearly judging the indwelling sheath in a blood vessel, simplify the puncture tube placing step and reduce the tube placing difficulty.
The technical scheme of the utility model is as follows: the double-cavity backflow-preventing arteriovenous puncture needle comprises a retention sheath tube and a puncture needle inner core;
the inner cavity of the puncture needle inner core is provided with a cylindrical pipe, one side of the cylindrical pipe is connected with the inner wall of the puncture needle inner core into a whole, and the inner cavity of the puncture needle inner core is divided into a needle core B cavity positioned at the inner side of the cylindrical pipe and a needle core A cavity positioned at the outer side of the cylindrical pipe through the cylindrical pipe;
the cylindrical tube head end is closed with a tail end opening, a needle core B cavity opening which is communicated with the outside of the puncture needle inner core and the inside of the needle core B cavity is formed in the joint of the cylindrical tube head end and the inner wall of the puncture needle inner core along the radial direction, and the needle core B cavity opening is flush with the head end position of the indwelling sheath tube during operation;
the head end of the needle core A cavity is the head tip of the puncture needle core, and the tail end of the needle core A cavity is the tail end of the puncture needle core, so that the needle core A cavity is communicated from the head tip of the puncture needle core to the tail end of the puncture needle core.
In actual use, the cylindrical tube can be designed into any shape according to the requirement, and the requirement that the inner cavity of the puncture needle inner core is divided into a needle core B cavity and a needle core A cavity which are mutually independent is only met.
Further, the tail end of the cylindrical tube extends to the outside of the tail end of the puncture needle inner core and protrudes. It is convenient to observe and distinguish whether the blood flows out from the cavity B of the needle core or from the cavity A of the needle core.
Further, the length of the tail end of the cylindrical tube protruding out of the tail end of the inner core of the puncture needle is 1.0cm-1.5cm. Further, an anti-backflow valve is arranged in the indwelling sheath tube.
Further, the outer diameter of the cylindrical tube is two-fifths to three-fifths of the length of the inner diameter of the inner core of the puncture needle.
The beneficial effects of the utility model are as follows: compared with the traditional single-cavity anti-backflow arteriovenous puncture needle, the double-cavity arteriovenous puncture needle is mainly innovated in that a needle core is divided into an A cavity and a B cavity. The cavity A is an irregular cavity gap and is connected with the tip of the needle core; the cavity B is a cylindrical cavity, and the opening of the cavity B is level with the front end of the indwelling sheath. In the puncturing process, if the tail end of the cavity A overflows, the front end of the needle core enters a blood vessel; if there is blood overflow at the end of the B cavity, it means that the outer sheath enters the blood vessel. If the blood at the tail end of the cavity B flows out smoothly, the needle core can be withdrawn and placed into the outer sheath no matter whether the blood at the tail end of the cavity A overflows or not.
Is suitable for all medical scenes requiring arteriovenous puncture indwelling sheath. The double-cavity needle core design can clearly show that the outer sheath tube is placed in the blood vessel, and provides a convenient judgment standard for whether the outer sheath tube can be placed in the blood vessel smoothly.
Drawings
FIG. 1 is a schematic view of a conventional single lumen anti-reflux arteriovenous puncture needle;
FIG. 2 is a schematic view of a indwelling sheath in a conventional single lumen anti-reflux arteriovenous puncture needle;
FIG. 3 is a schematic view of the inner core of a single lumen of a conventional single lumen anti-reflux arteriovenous puncture needle;
FIG. 4 is a schematic diagram of the operation of a conventional single-lumen anti-reflux arteriovenous puncture needle;
FIG. 5 is a schematic view of a dual lumen anti-reflux arteriovenous puncture needle of the present utility model;
FIG. 6 is a schematic view showing the separation of the double-cavity anti-reflux arteriovenous puncture needle according to the present utility model;
FIG. 7 is a schematic view of the operation of the dual-lumen anti-reflux arteriovenous puncture needle of the present utility model.
In the figure: 1 is an indwelling sheath tube, 2 is a double-cavity puncture needle inner core, 3 is a cylindrical tube, 4 is an anti-backflow valve, 5 is a single-cavity puncture needle inner core, 6 is a blood vessel, 21 is a needle core A cavity, 22 is a needle core B cavity, and 23 is a needle core B cavity opening.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 5 and 6, the double-cavity anti-reflux arteriovenous puncture needle comprises an indwelling sheath tube 1 and a puncture needle inner core 2. An anti-backflow flap 4 is arranged in the indwelling sheath tube 1.
The inner cavity of the puncture needle inner core 2 is provided with a cylindrical tube 3, one side of the cylindrical tube 3 is connected with the inner wall of the puncture needle inner core 2 into a whole, and the inner cavity of the puncture needle inner core 2 is divided into a needle core B cavity 22 positioned at the inner side of the cylindrical tube 3 and a needle core A cavity 21 positioned at the outer side of the cylindrical tube 3 through the cylindrical tube 3. The outer diameter of the cylindrical tube 3 is two-fifths to three-fifths of the length of the inner diameter of the lancet core 2.
The head end of the cylindrical tube 3 is sealed with an opening at the tail end, a needle core B cavity opening 23 for communicating the outer part of the puncture needle inner core 2 with the inner part of the needle core B cavity 22 is formed in the joint of the head end of the cylindrical tube 3 and the inner wall of the puncture needle inner core 2 along the radial direction, and the needle core B cavity opening 23 is flush with the head end of the indwelling sheath tube 1 during working. The tail end of the cylindrical tube 3 extends to the outside of the tail end of the puncture needle inner core and protrudes, and the length of the tail end of the protruding puncture needle inner core is 1.0cm-1.5cm. It is convenient to observe and distinguish whether the blood flows out from the cavity B of the needle core or from the cavity A of the needle core.
The head end of the needle core A cavity 21 is the head tip of the puncture needle core, and the tail end of the needle core A cavity 21 is the tail end of the puncture needle core, so that the needle core A cavity 21 is communicated from the head tip of the puncture needle core to the tail end of the puncture needle core.
Compared with the traditional single-cavity anti-backflow arteriovenous puncture needle, the double-cavity arteriovenous puncture needle is mainly innovated in that a needle core is divided into an A cavity and a B cavity. The cavity A is an irregular cavity gap and is connected with the tip end of the needle core. The cavity B is a cylindrical cavity, and the opening of the cavity B is level with the front end of the indwelling sheath. In the puncturing process, if the tail end of the cavity A overflows, the front end of the needle core enters the blood vessel. If there is blood overflow at the end of the B cavity, it means that the indwelling sheath enters the blood vessel. If the blood at the tail end of the cavity B flows out smoothly, the needle core can be withdrawn and placed into the indwelling sheath no matter whether the blood at the tail end of the cavity A overflows or not.
As shown in fig. 7, in the puncturing process, if d, the needle core is placed into a blood vessel, the blood in the cavity A can overflow, and the blood in the cavity B can not overflow, namely, the needle core is in the blood vessel, and the outer sheath tube is not in the blood vessel, so that the tube cannot be placed. If e, the needle core is placed into a blood vessel, the blood overflow can be seen in the cavity A, and the blood overflow can be seen in the cavity B, namely, the needle core and the outer sheath tube are both positioned in the blood vessel, and the correct tube placement can be successful. If f, the needle core penetrates through the blood vessel, the cavity A has no blood overflow, and the cavity B has the blood overflow, namely, the needle core is not in the blood vessel, but the outer sheath tube is in the blood vessel, and the correct tube placement can be successful. If g, the needle core penetrates through the blood vessel, the cavity A has no blood overflow, and the cavity B has no blood overflow, i.e. the needle core and the outer sheath tube are not in the blood vessel, and the tube cannot be placed at the moment. The main purpose of the design of the double-cavity arteriovenous puncture needle is to find a simple method for judging the indwelling sheath tube in the blood vessel, namely, the blood flow overflow seen at the tail end of the cavity B of the needle core is used as a judging standard for the entry of the outer sheath tube into the blood vessel. The overflow of blood flow at the tail end of the cavity B can also be used as a precondition and proper time for further withdrawing the needle core to be placed into the indwelling sheath.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (5)
1. Double-cavity anti-backflow arteriovenous puncture needle is characterized in that: comprises an indwelling sheath tube (1) and a puncture needle inner core (2);
the inner cavity of the puncture needle inner core (2) is provided with a cylindrical tube (3), one side of the cylindrical tube (3) is connected with the inner wall of the puncture needle inner core (2) into a whole, and the inner cavity of the puncture needle inner core (2) is divided into a needle core B cavity (22) positioned at the inner side of the cylindrical tube (3) and a needle core A cavity (21) positioned at the outer side of the cylindrical tube (3) through the cylindrical tube (3);
the head end of the cylindrical tube (3) is sealed, the tail end of the cylindrical tube (3) is opened, a needle core B cavity opening (23) for communicating the outer part of the puncture needle inner core (2) with the inner part of the needle core B cavity (22) is formed in the joint of the head end of the cylindrical tube (3) and the inner wall of the puncture needle inner core (2) along the radial direction, and the needle core B cavity opening (23) is flush with the head end position of the indwelling sheath tube (1) during working;
the head end of the needle core A cavity (21) is the head tip of the puncture needle core, and the tail end of the needle core A cavity (21) is the tail end of the puncture needle core, so that the needle core A cavity (21) is communicated from the head tip of the puncture needle core to the tail end of the puncture needle core.
2. The dual-lumen anti-reflux arteriovenous puncture needle according to claim 1, wherein: the tail end of the cylindrical tube (3) extends to the outside of the tail end of the puncture needle inner core and protrudes.
3. The dual-lumen anti-reflux arteriovenous puncture needle according to claim 2, wherein: the length of the tail end of the cylindrical tube (3) protruding out of the tail end of the inner core of the puncture needle is 1.0cm-1.5cm.
4. The dual-lumen anti-reflux arteriovenous puncture needle according to claim 1, wherein: an anti-backflow valve (4) is arranged in the indwelling sheath tube (1).
5. The dual-lumen anti-reflux arteriovenous puncture needle according to claim 1, wherein: the outer diameter of the cylindrical tube (3) is two-fifths to three-fifths of the length of the inner diameter of the puncture needle inner core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321494620.6U CN220370045U (en) | 2023-06-13 | 2023-06-13 | Double-cavity backflow-preventing arteriovenous puncture needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321494620.6U CN220370045U (en) | 2023-06-13 | 2023-06-13 | Double-cavity backflow-preventing arteriovenous puncture needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220370045U true CN220370045U (en) | 2024-01-23 |
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ID=89569442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321494620.6U Active CN220370045U (en) | 2023-06-13 | 2023-06-13 | Double-cavity backflow-preventing arteriovenous puncture needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220370045U (en) |
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2023
- 2023-06-13 CN CN202321494620.6U patent/CN220370045U/en active Active
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