CN205107699U - Prevent blood taking needle against current - Google Patents
Prevent blood taking needle against current Download PDFInfo
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- CN205107699U CN205107699U CN201520920940.2U CN201520920940U CN205107699U CN 205107699 U CN205107699 U CN 205107699U CN 201520920940 U CN201520920940 U CN 201520920940U CN 205107699 U CN205107699 U CN 205107699U
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- valve body
- needle
- reverse
- prevent
- current
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Abstract
The utility model relates to a prevent blood taking needle against current, include vein pjncture needle, hose, bottle plug pjncture needle and prevent structure against the current, prevent that the structure setting is between vein pjncture needle and bottle plug pjncture needle against the current, prevent that the structure includes the backpressure valve body and prevents contrary diaphragm against the current, the backpressure valve body has a valve pocket, and backpressure valve body both ends are connected respectively and are equipped with the influent stream pipe and go out the flow tube, it is equipped with the conical duct portion component disk seat to valve pocket inside extension towards the one end of the backpressure valve body to go out the flow tube, one end that influent stream pipe is close to the backpressure valve body is equipped with the intercommunication and mouthful is linked together with the valve pocket, disk seat tip and intercommunication mouthful relative the setting, interval between disk seat tip and the intercommunication mouth slightly is greater than prevents contrary diaphragm thickness, prevent that contrary diaphragm setting is between disk seat tip and intercommunication mouth. When appearing against the current, prevent contrary diaphragm and hug closely with the valve body that the passageway seals to it prevents against the current to realize the blood sampling. Owing to prevent having the joint -cutting on the contrary diaphragm, consequently can stop leakage phenomenon, safe and reliable more completely.
Description
Technical field
This utility model relates to a kind of medical apparatus, is specifically related to a kind of counterflow-preventing blood taking needle.
Background technology
Can use multiple pin class in medical institutions, blood taking needle is exactly that one wherein commonly uses needle set.Disposable lancet and single use human vein blood sample evacuated collection container support the use.Disposable lancet mainly comprises venipuncture needle, bottle cork needle, and venipuncture needle is connected with bottle cork needle by flexible pipe.Bottle cork needle penetrates human vein blood sample evacuated collection container, and collection container is communicated with blood taking needle.Current blood taking needle divides and softly connects formula and firmly connect formula: the soft link connecing formula blood taking needle comprises one section of transparent connecting hose, is convenient to observe blood back.In actual blood collection procedure, when also not extracting venipuncture needle after having gathered blood, blood is all likely from bottle cork needle backflow, and pollute blood of human body, damage human body, therefore, present disposable lancet is provided with backflow preventing structure.If notification number is a kind of disclosed in CN204336933U backflow preventing structure of blood taking needle, feature is: be made up of feed liquor seat, anti-reverse flow and tapping seat, anti-reverse flow is positioned in the middle of feed liquor seat and tapping seat, feed liquor seat and tapping seat adopt and to bond or ultrasonic bonding combines, anti-reverse flow is elastic sheet, sealed internal chamber is provided with for blood circulation in the centre of feed liquor seat and tapping seat, tapered protrusion sheet is fixed with at the right-hand member of fluid ring jacket, anti-reverse flow being propped up is fitted in feed liquor inner chamber, is provided with joint-cutting (slackening groove) in the middle of anti-reverse flow.The backflow preventing structure of this structure can play very large counterflow-preventing effect to blood, but can not reach complete counterflow-preventing effect, likely also there is the possibility of seepage, still there is the risk of infection.
Summary of the invention
The purpose of this utility model is to provide a kind of safe and reliable counterflow-preventing blood taking needle to overcome prior art deficiency.
For achieving the above object, this utility model provides following technical scheme: a kind of counterflow-preventing blood taking needle, comprise venipuncture needle, flexible pipe, bottle cork needle and backflow preventing structure, venipuncture needle is connected with bottle cork needle UNICOM, described backflow preventing structure is arranged between venipuncture needle and bottle cork needle, it is characterized in that: described backflow preventing structure comprises anti-reverse valve body and anti-reverse diaphragm, described anti-reverse valve body has a valve pocket, anti-reverse valve body two ends are connected with influent stream pipe and outflow tube respectively, described outflow tube is provided with towards one end of anti-reverse valve body the conical pipe portion formation valve seat extended to valve pocket inside, described valve seat wall is provided with breach and forms guiding gutter, described influent stream pipe is provided with connected entrance near one end of anti-reverse valve body and is connected with valve pocket, described valve seat end and connected entrance are oppositely arranged, spacing between described valve seat end and connected entrance is slightly larger than anti-reverse diaphragm thickness, described anti-reverse diaphragm arrangement is between valve seat end and connected entrance.
This utility model blood taking needle is when taking a blood sample, blood enters valve for preventing reverse-flow from the influent stream pipe flow of valve for preventing reverse-flow side, anti-reverse diaphragm moves to valve seat, blood flows into from the gap between counterflow-preventing valve body and anti-reverse diaphragm, and flows to blood taking needle bottle stopper end puncture needle from outflow tube outflow valve for preventing reverse-flow through guiding gutter; When occurring adverse current occurs, the liquid of bottle stopper end flows to valve for preventing reverse-flow, then in counterflow-preventing valve body, liquid can apply pressure to anti-reverse diaphragm, anti-reverse diaphragm is made to be close on connected entrance, sealing liquid is through the reverse outflow of influent stream pipe, and it is larger that bottle stopper end applies pressure, and anti-reverse diaphragm and valve body paste tighter, passage is more closed, thus realizes blood sampling counterflow-preventing.Due to anti-reverse diaphragm not having joint-cutting, therefore Seepage can be stopped completely, more safe and reliable.
Below in conjunction with the drawings and specific embodiments, this utility model is further described.
Accompanying drawing explanation
Fig. 1 is this utility model specific embodiment 1 structure sectional view;
Fig. 2 is this utility model specific embodiment 2 structure sectional view.
Detailed description of the invention
Embodiment 1: as shown in Figure 1, counterflow-preventing blood taking needle comprises venipuncture needle 1, flexible pipe 2, bottle cork needle 3 and backflow preventing structure 4.Described bottle cork needle 3 comprises bottle stopper puncture needle tubing 301 and bottle stopper puncture needle stand 302, bottle stopper puncture needle tubing 301 is fixedly installed on one end of bottle stopper puncture needle stand 302, venipuncture needle 1 is by being connected with bottle cork needle 3, described backflow preventing structure 4 is arranged between venipuncture needle 1 and bottle cork needle 3, described backflow preventing structure 4 comprises anti-reverse valve body 401 and anti-reverse diaphragm 402, described anti-reverse valve body 401 has a valve pocket, anti-reverse valve body 401 two ends are connected with influent stream pipe 403 and outflow tube 404 respectively, described outflow tube 404 is provided with towards one end of anti-reverse valve body 401 the conical pipe portion formation valve seat 405 extended to valve pocket inside, described valve seat wall is provided with breach and forms guiding gutter 406, described influent stream pipe 403 is provided with connected entrance near one end of anti-reverse valve body 401 and is connected with valve pocket, described valve seat 405 end and connected entrance are oppositely arranged, spacing between described valve seat 405 end and connected entrance is slightly larger than anti-reverse diaphragm 402 thickness, described anti-reverse diaphragm 402 is arranged between valve seat 405 end and connected entrance, the influent stream pipe 403 at anti-reverse valve body 401 two ends is connected with venipuncture needle 1 and bottle cork needle 3 respectively by flexible pipe 2 with outflow tube 404.Wherein, described anti-reverse valve body 401 and anti-reverse diaphragm 402 are preferably circle, and the centrage of influent stream pipe 403, outflow tube 404 and anti-reverse valve body 401 overlaps.
Embodiment 2:
As shown in Figure 2, when the flexible pipe 2 long enough of side, outflow tube 404 and the described bottle cork needle 3 of anti-reverse valve body 401 opposite side can be taked directly to be connected inserting the mode be tightly connected.Specifically the endoporus of described outflow tube 404 is conically arranged, and the other end profile of described bottle stopper puncture needle stand 302 is also conically arranged, and matches to form with the endoporus of tapering and outflow tube 404 and to be describedly tightly connected to inserting.
Claims (4)
1. a counterflow-preventing blood taking needle, comprise venipuncture needle, flexible pipe, bottle cork needle and backflow preventing structure, venipuncture needle is connected with bottle cork needle UNICOM, described backflow preventing structure is arranged between venipuncture needle and bottle cork needle, it is characterized in that: described backflow preventing structure comprises anti-reverse valve body and anti-reverse diaphragm, described anti-reverse valve body has a valve pocket, anti-reverse valve body two ends are connected with influent stream pipe and outflow tube respectively, described outflow tube is provided with towards one end of anti-reverse valve body the conical pipe portion formation valve seat extended to valve pocket inside, described valve seat wall is provided with breach and forms guiding gutter, described influent stream pipe is provided with connected entrance near one end of anti-reverse valve body and is connected with valve pocket, described valve seat end and connected entrance are oppositely arranged, spacing between described valve seat end and connected entrance is slightly larger than anti-reverse diaphragm thickness, described anti-reverse diaphragm arrangement is between valve seat end and connected entrance.
2. counterflow-preventing blood taking needle according to claim 1, is characterized in that: described anti-reverse valve body and anti-reverse diaphragm are circle, and the centrage of influent stream pipe, outflow tube and anti-reverse valve body overlaps.
3. counterflow-preventing blood taking needle according to claim 1, it is characterized in that: described bottle cork needle comprises bottle stopper puncture needle tubing and bottle stopper puncture needle stand, bottle stopper puncture needle tubing is fixedly installed on one end of bottle stopper puncture needle stand, and the other end of described bottle stopper puncture needle stand and outflow tube are tightly connected to inserting.
4. counterflow-preventing blood taking needle according to claim 3, it is characterized in that: the endoporus of described outflow tube is conically arranged, the other end profile of described bottle stopper puncture needle stand is also conically arranged, and matches to form with the hole taper of tapering and outflow tube and to be describedly tightly connected to inserting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520920940.2U CN205107699U (en) | 2015-11-18 | 2015-11-18 | Prevent blood taking needle against current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520920940.2U CN205107699U (en) | 2015-11-18 | 2015-11-18 | Prevent blood taking needle against current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205107699U true CN205107699U (en) | 2016-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520920940.2U Active CN205107699U (en) | 2015-11-18 | 2015-11-18 | Prevent blood taking needle against current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205107699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582075A (en) * | 2017-10-28 | 2018-01-16 | 刘贞宽 | Disposable pen type anti-reverse flow pattern vein blood taking needle safely |
-
2015
- 2015-11-18 CN CN201520920940.2U patent/CN205107699U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582075A (en) * | 2017-10-28 | 2018-01-16 | 刘贞宽 | Disposable pen type anti-reverse flow pattern vein blood taking needle safely |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |