CN202605427U - Remaining needle catheter component with anti-reverse-current valve - Google Patents
Remaining needle catheter component with anti-reverse-current valve Download PDFInfo
- Publication number
- CN202605427U CN202605427U CN 201220151993 CN201220151993U CN202605427U CN 202605427 U CN202605427 U CN 202605427U CN 201220151993 CN201220151993 CN 201220151993 CN 201220151993 U CN201220151993 U CN 201220151993U CN 202605427 U CN202605427 U CN 202605427U
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- valve
- cavity
- spool
- reverse
- catheter block
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Abstract
The utility model relates to a device which introduces a medium into a body, in particular to a remaining needle catheter component with an anti-reverse-current valve. The remaining needle catheter component with the anti-reverse-current valve is characterized in that a hollow cavity is arranged at the rear end portion of a catheter seat, furthermore, the anti-reverse-current valve is provided with a valve core which is made of medical soft material, the valve core is of a bowl structure, the front end of the valve core is an arc surface, a cross-shaped incision is arranged in the middle of the arc surface and forms four membranes, the rear end of the valve core is a hollow cylindrical cavity, the valve core is disposed in the hollow cavity at the rear end portion of the catheter seat, the arc surface is arranged on one side of a flexible pipe and forms a front cavity with a cavity of the catheter seat. The remaining needle catheter component with the anti-reverse-current valve has the advantages that the arc convex surface (arc surface) of the valve core has a dissipating pressure function and extrusion effect to the middle, effectively prevents blood reverse current and overflow outward, stops blood pollution, simplifies operating procedures of a remaining needle, and avoids mental pressure of a doctor and a patient under needle therapy.
Description
Technical field
This utility model relates to a kind ofly introduces intravital device with medium, particularly a kind of indwelling needle catheter assembly with valve for preventing reverse-flow.The said technical scheme of this utility model is applicable to venous transfusion and arterial infusion.
Background technology
Existing remaining needle comprises conduit tube component and piercing assembly two parts; Conduit tube component includes catheter block and flexible pipe; The leading section of catheter block connects flexible pipe, and rearward end is provided with the connecting portion of the hollow that is connected with piercing assembly, and the needle tubing in the piercing assembly passes this catheter block and gets in the flexible pipe.When the flexible pipe that will have a needle tubing with a kind of low-angle when remaining needle passes the patient skin intravasation; The medical worker is through exerting pressure with sealing blood vessels above the skin of conduit place blood vessel away from conduit tube component; Withdraw from the puncture needle tubing simultaneously, thereby reduce the blood that when withdrawing from needle tubing, passes through the outside overflow of conduit tube component as far as possible.But this mode of operation needs medical personnel's both hands to closely cooperate; Otherwise in case the blood vessel sealing is unreal, blood is easy to draw and when needle point gets into catheter block, be released in the catheter block with needle tubing; After piercing assembly separates from catheter block; Blood has caused blood contamination with overflow outside, simultaneously also to the sufferer psychology that generates a panic.
The utility model content
The purpose of this utility model is to overcome the weak point of prior art and provides a kind of blood that can intercept to outflow, the easy to operate indwelling needle catheter assembly with valve for preventing reverse-flow.
The purpose of this utility model realizes through following approach:
Indwelling needle catheter assembly with valve for preventing reverse-flow includes catheter block and the flexible pipe that is connected the catheter block front end, and its structural feature is; The rearward end of catheter block is the hollow posts chamber, also includes valve for preventing reverse-flow, and it has the spool processed by the medical flexible material; Spool is bowl-shape structure, and its front end is an arcwall face, has cross recess in the middle of this arcwall face; Form four diaphragms, the rear end is the circular cylindrical cavity of hollow, and this spool is installed in the hollow posts chamber of catheter block rearward end; Arcwall face is positioned at the side near flexible pipe, and forms a preceding cavity with the inner chamber of catheter block.
Like this, the cross recess that the needle tubing of piercing assembly can pass on this spool gets in the flexible pipe, when the completion puncture prepares to remove pin; Slight compressing perhaps need not to oppress the blood vessel hemostasis, after blood is being withdrawn from needle tubing, gets in the preceding cavity of catheter block inner spool front end, because the spool barrier effect; Blood by shutoff in the preceding cavity of catheter block; The mechanism of action of the concrete soft spool of rubber-like is following: utilize arc convex surface to have the dispersive pressure function and to middle extrusion effect, can bear more high pressure with homalographic, so four circular arc diaphragms of reflux valve receive the blood pressure effect in the conduit tube component; Just can be airtight easily; Cylindrical wall on the spool circular cylindrical cavity receives the arcwall face compressing toward outside sweep simultaneously, forces the cross recess above the spool better to fit tightly, and stops blood outwards to overflow.And when at its reverse side (circular arc concave surface) when exerting pressure (during transfusion), and when the bigger excess convexity surface pressure of concave surface pressure, after external and internal pressure was cancelled out each other, the circular arc diaphragm just received outside tension force, and diaphragm can easily be opened, and reaches the transfusion purpose.
This utility model is said, and to have an indwelling needle catheter modular construction of valve for preventing reverse-flow simple, can effectively prevent blood back flow and outwards overflow, stopped blood contamination; In operation; Need not to oppress again the operation of blood vessel, simplified operation sequence, exempted the mental pressure of doctor and patient.
This utility model can further be specially:
Valve for preventing reverse-flow also includes a valve core housing, and this valve core housing is that elastic soft material is processed, and is interior hollow, outer step ladder circular ring post shapes, and preceding annulus column sleeve body is enclosed within on the medial surface of spool circular cylindrical cavity, and back annulus column sleeve body is supported in the catheter block inner chamber.
Valve core housing is used for firmly supporting spool, makes spool rear end and catheter block inwall more closely cooperate simultaneously.
The circular cylindrical cavity of spool rear end comprises stage casing cavity and back segment cavity, and the thickness of the chamber wall of arcwall face, stage casing cavity, the chamber wall of back segment cavity increases in regular turn.
That is to say that the stage casing is the hollow circuit cylinder cavity, the chamber wall is slightly thicker than arcwall face, is the supporter of arcwall face; Back segment also is the hollow circuit cylinder cavity, and the chamber wall is thicker than the stage casing, and the boss ratio stage casing is big simultaneously, and the external diameter size can closely cooperate in order to avoid leakage with pipe inner wall just.
Be provided with protruding snap ring in the catheter block inner chamber, the circular cylindrical cavity of spool is supported on this convexity snap ring.
Like this, can further location be arranged, prevent that it from sliding in catheter block, avoid causing anti-adverse current to lose efficacy spool.
In sum; This utility model provides a kind of indwelling needle catheter assembly with valve for preventing reverse-flow, has adopted a kind of elastomeric flexible, just as bowl-shape spool, utilizes its arc convex surface (arcwall face) to have the dispersive pressure function and to middle extrusion effect; Blood back flow and outwards overflow have effectively been prevented; Stopped blood contamination, simplified the operation sequence of remaining needle, exempted doctor and patient at the mental pressure of executing the pin process.
Description of drawings
Shown in Figure 1 is the said structural representation with indwelling needle catheter assembly of valve for preventing reverse-flow of this utility model;
Fig. 2 is depicted as the enlarged diagram of A part among Fig. 1;
Shown in Figure 3 is the structural representation of said valve for preventing reverse-flow core;
Below in conjunction with embodiment this utility model is done and to be further described
The specific embodiment
Most preferred embodiment
With reference to accompanying drawing 1 and accompanying drawing 2, have the indwelling needle catheter assembly of valve for preventing reverse-flow, include catheter block 1, be connected the flexible pipe 2 and the valve for preventing reverse-flow of catheter block front end, the needle tubing in the piercing assembly 3 passes this catheter block and gets in flexible pipe; The rearward end of catheter block 1 is the hollow posts chamber, and the middle part in this hollow posts chamber has a protruding snap ring 4; Valve for preventing reverse-flow includes one by medical flexible material spool of processing 5 and the valve core housing 6 that is interior hollow, outer ladder cylindrical shape.
Wherein, the structure of spool 5 is simultaneously with reference to accompanying drawing 3, and spool 5 is bowl-shape structure; Its front end is an arcwall face 51, in the middle of arcwall face 51, does a cross recess, makes to form four diaphragms closely on the arcwall face; The rear end is the circular cylindrical cavity of hollow; Comprise stage casing cavity 52 and back segment cavity 53, the chamber wall of stage casing cavity 52 is slightly thicker than arcwall face 51, is the supporter of arcwall face; The chamber wall of back segment cavity 53 is thicker than stage casing cavity 52, and the boss ratio stage casing is big simultaneously, and the external diameter size can closely cooperate in order to avoid leakage with pipe inner wall just.
With reference to accompanying drawing 1,2 and combine accompanying drawing 3, spool 5 contains the periphery than the preceding annulus post chamber of minor diameter that is enclosed within valve core housing 6, and the annulus post chamber, larger-diameter back of valve core housing 6 is supported on protruding snap ring 4 top end faces in catheter block 1 inner chamber.The back segment cavity 53 of spool 5 just can be supported on this convexity snap ring 4 like this.The arcwall face of spool 5 is positioned at the side near flexible pipe, and forms a preceding cavity 7 with the inner chamber of catheter block.
During operation,, see that blood back cavity (a transparent or semitransparent needle stand part) is when having blood back when the remaining needle leading section correctly inserts in the blood vessel; Reduce the remaining needle angle, in needle tubing needle point indentation conduit, pinch needle stand and catheter block then simultaneously and push conduit entering patient's blood vessel forward; Directly withdraw from puncture needle tubing assembly again; And need not to stop blooding and overflow with resistant to blood through the compressing blood vessel because the valve for preventing reverse-flow barrier effect, blood by shutoff in catheter block.
The valve for preventing reverse-flow core is processed such as silica gel by the medical flexible material, and the water insoluble and any solvent of silica gel material is nonpoisonous and tasteless, and chemical property is stable, except that highly basic, Fluohydric acid., does not react with any material.Silica gel has particular performances: 1, Heat stability is good; 2, chemical property is stable; 3, higher mechanical strength etc. is arranged.
It is identical with prior art that this utility model is not stated part.
Claims (4)
1. the indwelling needle catheter assembly that has valve for preventing reverse-flow includes catheter block and the flexible pipe that is connected the catheter block front end, it is characterized in that; The rearward end of catheter block is the hollow posts chamber, also includes valve for preventing reverse-flow, and it has the spool processed by the medical flexible material; Spool is bowl-shape structure, and its front end is an arcwall face, has cross recess in the middle of this arcwall face; Form four diaphragms, the rear end is the circular cylindrical cavity of hollow, and this spool is installed in the hollow posts chamber of catheter block rearward end; Arcwall face is positioned at the side near flexible pipe, and forms a preceding cavity with the inner chamber of catheter block.
2. the indwelling needle catheter assembly with valve for preventing reverse-flow according to claim 1; It is characterized in that; Valve for preventing reverse-flow also includes a valve core housing, and this valve core housing is that elastic soft material is processed, and is interior hollow, outer step ladder circular ring post shapes; Preceding annulus column sleeve body is enclosed within on the medial surface of spool circular cylindrical cavity, and back annulus column sleeve body is supported in the catheter block inner chamber.
3. the indwelling needle catheter assembly with valve for preventing reverse-flow according to claim 1 is characterized in that the circular cylindrical cavity of spool rear end comprises stage casing cavity and back segment cavity, and the thickness of the chamber wall of arcwall face, stage casing cavity, the chamber wall of back segment cavity increases in regular turn.
4. the indwelling needle catheter assembly with valve for preventing reverse-flow according to claim 1 is characterized in that, is provided with protruding snap ring in the catheter block inner chamber, and the circular cylindrical cavity of spool is supported on this convexity snap ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220151993 CN202605427U (en) | 2012-04-12 | 2012-04-12 | Remaining needle catheter component with anti-reverse-current valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220151993 CN202605427U (en) | 2012-04-12 | 2012-04-12 | Remaining needle catheter component with anti-reverse-current valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202605427U true CN202605427U (en) | 2012-12-19 |
Family
ID=47339164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220151993 Expired - Lifetime CN202605427U (en) | 2012-04-12 | 2012-04-12 | Remaining needle catheter component with anti-reverse-current valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202605427U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505772A (en) * | 2013-09-30 | 2014-01-15 | 苏州市雅思精密模具有限公司 | Backflow prevention infusion tube |
| CN103656790A (en) * | 2013-06-21 | 2014-03-26 | 南通恒泰医疗器材有限公司 | Disposable anti-reflux casing pipe type intravenous infusion needle |
| CN106620943A (en) * | 2015-10-28 | 2017-05-10 | 贝克顿·迪金森公司 | Compliant catheter adapter and compression cap |
| WO2018133017A1 (en) * | 2017-01-20 | 2018-07-26 | 福建省百仕韦医用高分子股份有限公司 | Reusable indwelling cannula component for preventing blood backflow |
| CN110652626A (en) * | 2019-10-30 | 2020-01-07 | 北京伏尔特技术有限公司 | Novel indwelling needle catheter component |
| US10675440B2 (en) | 2016-02-18 | 2020-06-09 | Smiths Medical Asd, Inc. | Closed system catheter |
| US12048541B2 (en) | 2018-06-08 | 2024-07-30 | Smiths Medical Asd, Inc. | Blood sequestration device and method |
-
2012
- 2012-04-12 CN CN 201220151993 patent/CN202605427U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656790A (en) * | 2013-06-21 | 2014-03-26 | 南通恒泰医疗器材有限公司 | Disposable anti-reflux casing pipe type intravenous infusion needle |
| CN103656790B (en) * | 2013-06-21 | 2018-04-20 | 南通恒泰医疗器材有限公司 | A kind of disposable counterflow-preventing bushing type intravenous infusion needle |
| CN103505772A (en) * | 2013-09-30 | 2014-01-15 | 苏州市雅思精密模具有限公司 | Backflow prevention infusion tube |
| CN106620943A (en) * | 2015-10-28 | 2017-05-10 | 贝克顿·迪金森公司 | Compliant catheter adapter and compression cap |
| CN106620943B (en) * | 2015-10-28 | 2020-12-04 | 贝克顿·迪金森公司 | Compliant catheter adapter and compression crown |
| US10675440B2 (en) | 2016-02-18 | 2020-06-09 | Smiths Medical Asd, Inc. | Closed system catheter |
| WO2018133017A1 (en) * | 2017-01-20 | 2018-07-26 | 福建省百仕韦医用高分子股份有限公司 | Reusable indwelling cannula component for preventing blood backflow |
| US12048541B2 (en) | 2018-06-08 | 2024-07-30 | Smiths Medical Asd, Inc. | Blood sequestration device and method |
| CN110652626A (en) * | 2019-10-30 | 2020-01-07 | 北京伏尔特技术有限公司 | Novel indwelling needle catheter component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |