CN202665545U - Negative pressure injector - Google Patents
Negative pressure injector Download PDFInfo
- Publication number
- CN202665545U CN202665545U CN 201220347291 CN201220347291U CN202665545U CN 202665545 U CN202665545 U CN 202665545U CN 201220347291 CN201220347291 CN 201220347291 CN 201220347291 U CN201220347291 U CN 201220347291U CN 202665545 U CN202665545 U CN 202665545U
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- CN
- China
- Prior art keywords
- syringe
- negative pressure
- push rod
- piston push
- release arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A negative pressure injector comprises a needle cylinder and a piston push rod, wherein a needle adaptor tube is arranged at the low end of the needle cylinder and the piston push rod is movably arranged in the needle cylinder, and a holding mechanism which is used for enabling the piston push rod to be in a negative pressure position is arranged between the piston push rod and the needle cylinder. When the piston push rod is in the negative pressure position, the lower section of the needle cylinder forms a closed negative pressure cavity, a decompression branch pipe communicated with the negative pressure cavity is arranged on the side wall outside the needle cylinder, a separating film which enables blood to be blocked and air to go through is arranged in the decompression branch pipe, and a closed cover which can be opened is arranged at the decompression branch pipe. The negative pressure injector has the advantages that the structure is simple, penetration of veins or arteries is convenient, and simultaneous judgement of artery blood vessels and venous blood vessels can be achieved.
Description
Technical field
This utility model relates to a kind of vacuum injector.
Background technology
In daily medical work, when the patient is carried out dark vein or arterypuncture, generally adopt common syringe, the piston push rod that often need pull syringe makes syringe produce negative pressure, and this can cause needle and syringe head position movement, and poor stability is inconvenient to operate; When hypovolemia patient row deep vein puncture, adopts common syringe, often blood vessel is inhaled flat because reaching high negative pressure, and can't judge correctly whether needle position is positioned at vein blood vessel.The patent No. is 200420052734.6 vacuum injector, by the negative pressure spring piston push rod is drawn blood automatically, and is easy to operate, but syringe syringe inside in piercing process is not communicated with atmosphere, therefore can't judge accurately that blood vessel is vein or tremulous pulse.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of simple in structure, easy to operate and can judge the vacuum injector of vascular group.
The purpose of this utility model realizes by following technical solution:
A kind of vacuum injector, comprise that the lower surface is provided with the syringe needle syringe of taking over and the piston push rod that is movably set in the syringe, it is characterized in that: be provided with between piston push rod and the syringe be used to making piston push rod be in the maintaining body of negative pressure position, when piston push rod is in the negative pressure position, the syringe hypomere forms the negative pressure cavity of sealing, the syringe lateral wall is provided with the pressure release arm that is communicated with negative pressure cavity, be provided with the Obstruct membrane that can keep off the blood ventilation in the pressure release arm, be provided with openable closing cap on the pressure release arm.
Further, described maintaining body comprises and is formed at syringe top and the breach that extends along the syringe length direction, is arranged at the dop that can slide and may be stuck in edge on the syringe along the breach of syringe on the piston push rod.
Further, described seal cover is connected with syringe by rubber strip.
Further, described syringe lower surface is provided with the nipple joint of taking over around syringe needle, and the nipple joint inwall is provided with female thread.
Further, described pressure release arm is arranged on the lateral wall of syringe lower end, and with the syringe internal communication.
The utlity model has following beneficial effect:
Carrying out negative pressure when drawing blood, seal cover props up the seal of tube with pressure release, can make piston push rod be in the negative pressure position by maintaining body, and the blood of bootable tremulous pulse or vein flows in the syringe under the atmospheric pressure effect like this; Maintaining body is comprised of breach and dop, only needs the rotary-piston push rod can make dop be stuck in edge on the syringe during operation, makes piston push rod remain on the negative pressure position, and is simple in structure, easy to operate; The pressure release arm is arranged on the lateral wall of syringe lower end, can regulate by the pressure release arm like this negative pressure intensity of negative pressure cavity.To be connected with puncture needle with the syringe of sealing pressure release arm before the puncture, elder generation's extracting liquid or air make piston push rod place the certain position of syringe, after puncture needle penetrates cortex, the pulling piston push rod makes it to be in the negative pressure position, can regulate negative pressure intensity by the amount of extracting liquid or air like this.Patient for hypovolemia, can extract more liquid or air makes piston push rod be in the higher position of syringe, then spur piston push rod and make it to be in the negative pressure position, the negative pressure that produces like this is less, can not cause blood vessel shrivelled and can't judge correctly whether needle position is positioned at vein blood vessel.When deep vein puncture, behind the syringe blood back, the seal cover that can open the pressure release arm makes that syringe is inner to communicate with atmosphere, and makes the pressure release arm up, like this by observing the speed and highly just can judge that the blood vessel of puncture is tremulous pulse or vein gushed out at pressure release arm inner blood.
Description of drawings
Below in conjunction with accompanying drawing this utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
The specific embodiment
With reference to shown in Figure 1, a kind of vacuum injector, comprise that the lower surface is provided with syringe needle and takes over 13 syringe 1 and the piston push rod 2 that is movably set in the syringe 1, be provided with between piston push rod 2 and the syringe 1 be used to making piston push rod 2 be in the maintaining body of negative pressure position, when piston push rod 2 is in the negative pressure position, syringe 1 hypomere forms the negative pressure cavity of sealing, lateral wall, syringe 1 lower end is provided with the pressure release arm 12 that is communicated with negative pressure cavity, be provided with the Obstruct membrane that can keep off the blood ventilation in the pressure release arm 12, this Obstruct membrane is medical device gear blood air ventilation membrane commonly used, here no longer describe in detail, be provided with openable closing cap 121 on the pressure release arm 12, maintaining body comprises the breach 11 that is formed at syringe 1 top and extends along syringe 1 length direction, be arranged at the dop 21 that can slide and may be stuck in edge on the syringe 1 along the breach 11 of syringe 1 on the piston push rod 2, seal cover 121 is connected with syringe 1 by rubber strip 122, and syringe 1 lower surface is provided with around syringe needle and takes over 13 for the nipple joint 14 that docks with armarium.
By seal cover 121 pressure release arm 12 is sealed before the puncture, syringe is connected with puncture needle, elder generation's extracting liquid or air make piston push rod 2 place the certain position of syringe, after puncture needle penetrates cortex, piston push rod 2 pulled out and rotate make dop 21 be stuck in edge on the syringe 1, make piston push rod 2 be in the negative pressure position, at this moment syringe 1 hypomere forms negative pressure cavity, can regulate negative pressure intensity by the amount of extracting liquid or air like this.Patient for hypovolemia, can extract more liquid or air make piston push rod 2 be in the higher position of syringe (in case of necessity can be at the corresponding scale of syringe 1 mark hypovolemia, the distance of pulling out with control piston push rod 2), then spurring piston push rod 2 makes syringe be in negative pressure state, the negative pressure that produces like this is less, can not cause blood vessel shrivelled and can't judge correctly whether needle position is positioned at vein blood vessel.When judging vascular group, behind the syringe blood back, can open the seal cover 121 of pressure release arm 12, syringe inside is communicated with atmosphere, and make pressure release arm 12 up, just can judge that by observing at gush out speed and the height of pressure release arm inner blood the blood vessel of puncture is tremulous pulse or vein like this.When blood slowly flows into syringe 1 and pressure release arm 12, and the blood flow height in the pressure release arm 12 is lower, and then blood vessel is vein; When blood is gushed in a large number into syringe 1 and pressure release arm 12, and the blood flow height in the pressure release arm 12 is higher, and then blood vessel is tremulous pulse.
The above, it only is preferred embodiment of the present utility model, therefore can not limit the scope that this utility model is implemented with this, the equivalence of namely doing according to this utility model claim and description changes and modifies, and all should still belong in the scope that this utility model patent contains.
Claims (5)
1. vacuum injector, comprise that the lower surface is provided with the syringe needle syringe of taking over and the piston push rod that is movably set in the syringe, it is characterized in that: be provided with between piston push rod and the syringe be used to making piston push rod be in the maintaining body of negative pressure position, when piston push rod is in the negative pressure position, the syringe hypomere forms the negative pressure cavity of sealing, the syringe lateral wall is provided with the pressure release arm that is communicated with negative pressure cavity, be provided with the Obstruct membrane that can keep off the blood ventilation in the pressure release arm, be provided with openable closing cap on the pressure release arm.
2. a kind of vacuum injector according to claim 1 is characterized in that: described maintaining body comprises and is formed at syringe top and the breach that extends along the syringe length direction, is arranged at the dop that can slide and may be stuck in edge on the syringe along the breach of syringe on the piston push rod.
3. a kind of vacuum injector according to claim 1 and 2, it is characterized in that: described seal cover is connected with syringe by rubber strip.
4. a kind of vacuum injector according to claim 1 and 2 is characterized in that: described syringe lower surface is provided with the nipple joint of taking over around syringe needle, and the nipple joint inwall is provided with female thread.
5. a kind of vacuum injector according to claim 1 and 2, it is characterized in that: described pressure release arm is arranged on the lateral wall of syringe lower end, and with the syringe internal communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347291 CN202665545U (en) | 2012-07-18 | 2012-07-18 | Negative pressure injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220347291 CN202665545U (en) | 2012-07-18 | 2012-07-18 | Negative pressure injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202665545U true CN202665545U (en) | 2013-01-16 |
Family
ID=47486489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220347291 Expired - Fee Related CN202665545U (en) | 2012-07-18 | 2012-07-18 | Negative pressure injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202665545U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108888852A (en) * | 2018-08-07 | 2018-11-27 | 北京医院 | It is a kind of for pulling out the auxiliary syringe of urinary catheter |
| CN114984335A (en) * | 2022-04-11 | 2022-09-02 | 中国人民解放军空军军医大学 | Double-needle suction injection device for assisting vascular malformation rehabilitation |
-
2012
- 2012-07-18 CN CN 201220347291 patent/CN202665545U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108888852A (en) * | 2018-08-07 | 2018-11-27 | 北京医院 | It is a kind of for pulling out the auxiliary syringe of urinary catheter |
| CN108888852B (en) * | 2018-08-07 | 2023-07-18 | 北京医院 | Auxiliary injector for removing urinary catheter |
| CN114984335A (en) * | 2022-04-11 | 2022-09-02 | 中国人民解放军空军军医大学 | Double-needle suction injection device for assisting vascular malformation rehabilitation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |