CN2406672Y - Venous transfusion device against backflow - Google Patents
Venous transfusion device against backflow Download PDFInfo
- Publication number
- CN2406672Y CN2406672Y CN 00203100 CN00203100U CN2406672Y CN 2406672 Y CN2406672 Y CN 2406672Y CN 00203100 CN00203100 CN 00203100 CN 00203100 U CN00203100 U CN 00203100U CN 2406672 Y CN2406672 Y CN 2406672Y
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- CN
- China
- Prior art keywords
- transfusion
- valve block
- backflow
- tube
- protecting pipe
- 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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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a venous transfusion device capable of preventing backflow, which comprises a transfusion tube and a needle head, wherein the transfusion tube which is close to the needle head is connected with a liquid flow direction control device composed of a valve sheet and a sheath tube, and the valve sheet is arranged in the sheath tube. The utility model solves the problem that the prior art can not prevent blood backflow, and has the advantages of avoidance of blood loss, convenience of doctors and patients, simple structure and low cost.
Description
This utility model relates to a kind of intravenous transfusion device, specifically a kind of anti-backflow intravenous transfusion device.
Existing intravenous transfusion device comprises tube for transfusion and syringe needle, by the pressure reduction work of liquid.When liquid is about to be totally lost, intravenous pressure will be higher than tube for transfusion pressure, if do not extract syringe needle this moment, the venous patient inner blood can blow back into tube for transfusion.Clinically, the blood loss that is caused by refluence can reach several milliliters even tens milliliters, unless patient has used anticoagulant because of special requirement, the blood regular meeting of these refluences solidifies in tube for transfusion, can not fail back vein again and use.Blood loss causes patient discontented or uneasy.
The intravenous transfusion device that blood can not flow backwards after the purpose of this utility model was to provide a kind of medicinal liquid to be totally lost.
For achieving the above object, intravenous transfusion device of the present utility model comprises tube for transfusion and syringe needle, is connected with the flow direction control device that is made of valve block and protecting pipe on the tube for transfusion of syringe needle closing on, and said valve block is installed in the protecting pipe.
Said valve block is tubaeform, and the position, intermediate portion has otch.
Said valve block is a cylinder, and this cylinder longitudinally is provided with several guide grooves, and the liquid feeding end of this guide groove is shallow, and liquid outlet is dark; The inlet diameter of said protecting pipe is less than the liquid outlet diameter.
Because technique scheme is connected with the flow direction control device that is made of valve block and protecting pipe closing on the tube for transfusion of syringe needle, the folding of valve is by the hydraulic pressure difference decision of its both sides, therefore only allow the liquid folk prescription to flowing, can effectively prevent backflow of blood, have the blood loss avoided, make things convenient for doctors and patients' beneficial effect, and simple in structure, cost is low.
Below in conjunction with the drawings and specific embodiments this utility model is described in further detail.
Fig. 1 is the structural representation of this utility model anti-backflow intravenous transfusion device;
Fig. 2 is a kind of flow direction control device of this utility model anti-backflow intravenous transfusion device sketch map;
Fig. 3 is that Fig. 2 is along A-A line cutaway view;
Fig. 4 is the another kind of flow direction control device of a this utility model sketch map;
Fig. 5 is the cutaway view of Fig. 4 along the B-B line.
As seen from Figure 1, this utility model anti-backflow intravenous transfusion device comprises tube for transfusion 1, and syringe needle 2 is connected with the flow direction control device that is made of valve block and protecting pipe on the tube for transfusion 1 that closes on syringe needle 2.Referring to Fig. 2 and Fig. 3, tubaeform valve block 3 is installed in the protecting pipe 4, valve block 3 is by the rubber manufacturing, and the position, intermediate portion has otch 5, and horn mouth is an inlet.During transfusion, medicinal liquid is on the tubaeform valve block 3 that tube for transfusion 1 flows in the protecting pipe 4, under action of pressure, the otch 5 at valve block 3 middle parts is forced to open, liquid is just imported the intravenous of human body at an easy rate, and after medicinal liquid was totally lost, the pressure in the human vein was higher than the pressure in the tube for transfusion, the otch 5 at tubaeform valve block 3 middle parts is forced to closure, thereby prevents that backflow of blood is in tube for transfusion.
By Fig. 4 and Fig. 5 as seen, the another kind of flow direction control device of this utility model also is made of valve block and protecting pipe.Valve block is a cylinder 6, this cylinder 6 vertically be provided with four guide grooves 7, guide groove 7 also can be 2,3 or more.The liquid feeding end of this guide groove 7 is shallow, and liquid outlet is dark, and the inlet diameter of protecting pipe 4 is less than the liquid outlet diameter.Cylinder 6 is similar to piston, is installed in the protecting pipe 4.During transfusion, under action of pressure, cylinder 6 is pulled to the liquid outlet of protecting pipe 4, because cylinder 6 longitudinally is provided with guide groove 7, an end of guide groove 7 is shallow, and the other end is dark, and the liquid outlet diameter of protecting pipe 4 is big, and therefore, medicinal liquid can flow into the intravenous of human body smoothly along guide groove 7.After medicinal liquid was totally lost, because intravenous pressure is higher than the pressure in the tube for transfusion, cylinder 7 was pulled to the inlet of protecting pipe 4 and with the inlet sealing, therefore, can effectively prevents backflow of blood.
Claims (3)
1, a kind of anti-backflow intravenous transfusion device comprises tube for transfusion and syringe needle, it is characterized in that: be connected with the flow direction control device that valve block and protecting pipe (4) constitute on the tube for transfusion that closes on syringe needle (2) (1), said valve block is installed in the protecting pipe (4).
2, anti-backflow intravenous transfusion device according to claim 1 is characterized in that: said valve block is tubaeform, and the middle part of this tubaeform valve block (3) has otch (5).
3, anti-backflow intravenous transfusion device according to claim 1 is characterized in that: said valve block is cylinder (6), and cylinder (6) longitudinally is provided with several guide grooves (7), and the liquid feeding end of this guide groove (7) is shallow, and liquid outlet is dark; The inlet diameter of said protecting pipe (4) is less than the liquid outlet diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00203100 CN2406672Y (en) | 2000-01-31 | 2000-01-31 | Venous transfusion device against backflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00203100 CN2406672Y (en) | 2000-01-31 | 2000-01-31 | Venous transfusion device against backflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2406672Y true CN2406672Y (en) | 2000-11-22 |
Family
ID=33571862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00203100 Expired - Fee Related CN2406672Y (en) | 2000-01-31 | 2000-01-31 | Venous transfusion device against backflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2406672Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714272A (en) * | 2018-06-26 | 2018-10-30 | 华中科技大学同济医学院附属协和医院 | The special injection-tube of alveolar surfactant |
-
2000
- 2000-01-31 CN CN 00203100 patent/CN2406672Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714272A (en) * | 2018-06-26 | 2018-10-30 | 华中科技大学同济医学院附属协和医院 | The special injection-tube of alveolar surfactant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |