CN103170035B - Blood-return-preventing pre-filling pipe-washing syringe - Google Patents
Blood-return-preventing pre-filling pipe-washing syringe Download PDFInfo
- Publication number
- CN103170035B CN103170035B CN201310114667.XA CN201310114667A CN103170035B CN 103170035 B CN103170035 B CN 103170035B CN 201310114667 A CN201310114667 A CN 201310114667A CN 103170035 B CN103170035 B CN 103170035B
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- CN
- China
- Prior art keywords
- piston
- sleeve
- top land
- blood
- push rod
- 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.)
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- 238000005406 washing Methods 0.000 title abstract 4
- 239000008280 blood Substances 0.000 claims abstract description 14
- 210000004369 blood Anatomy 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 241001149930 Protura <class> Species 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 4
- 230000023555 blood coagulation Effects 0.000 description 3
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011443 conventional therapy Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229960002897 heparin Drugs 0.000 description 1
- 229920000669 heparin Polymers 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a blood-return-preventing pre-filling pipe-washing syringe. The blood-return-preventing pre-filling pipe-washing syringe comprises a sleeve, a push rod and a piston, wherein a conical head connected with a conduit is installed at the far end of the sleeve, liquid flows out of a hollow channel installed inside the conical head, and a sleeve conical portion is formed on two sides of the hollow channel opening and on the upper portion of the sleeve; the piston and the push rod are connected with each other and are sleeved inside the sleeve; a chamber filled with the liquid is formed by the piston and the inner wall of the sleeve; and the top of the piston is of a conical structure, the top of the piston can seal the hollow channel, and the angle of contacting portions between the top of the piston and the sleeve conical portion ranges from 0 degree to 5 degrees. The blood-return-preventing pre-filling pipe-washing syringe can effectively prevent blood return and enhances using safety.
Description
Technical field
The present invention relates to a kind of syringe, relate in particular to a kind of pre-filled flushing syringe of blood return prevention type using in the time of irrigating catheter.
Background technology
Venous duct is a kind of conventional therapy equipment, arranging of venous duct can conveniently be treated, for example can medicine be input in human body by venous duct, and these conduits need to rinse to keep catheter patency and complete, the fluid of irrigating catheter is housed in pre-filled flushing syringe, as pump pickle solution, heparin etc.
The formula of rushing the in advance flushing syringe using is at present in the time that rinsing step finishes, push rod pushing piston, when top land pushes to the conehead of sleeve, top land and outer casing inner wall are fitted or most of laminating completely, and the suffered power of piston makes top land distortion go deep into the hollow channel of conehead.When removing external force, when piston head distortion recovers, the liquid in locking conehead can be drawn back, and produce blood back, cause blood clot to produce, blood meeting grumeleuse seal conduit in conduit, has blood clotting and is present in conduit like this.Because conduit is imbedded in body, be also difficult to observe grumeleuse, in the time rinsing next time, blood clotting directly may be punched in body, patient is produced to harm.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, and the pre-filled flushing syringe of a kind of blood return prevention type providing, for rinsing, seal venous duct.
The present invention is achieved in that the pre-filled flushing syringe of a kind of blood return prevention type, comprise sleeve, push rod, piston, described sleeve far-end has the conehead of connecting duct, the hollow channel that conehead has liquid to flow out, and upper cartridge forms sleeve taper section in hollow channel mouth both sides; Piston is connected with push rod, is sleeved in sleeve; Piston and sleeve lining form the chamber of filling liquid; Described top land is tapered structure, the salable hollow channel of top land, and the angle of top land and sleeve taper section contact site is 0-5 °.
Between described top land and push rod, have a piston retraction chamber, top land is thin-wall construction.
The invention has the beneficial effects as follows, the angle of top land and sleeve taper section contact site is 0-5 °, in this angular range, top land is in the time of sealed hollow passage, and top land is that point type contacts with sleeve taper section, in the time that thrust is excessive, sleeve taper section contact point applies opposition to top land, prevents that top land from entering hollow channel too much, thereby has avoided when removing external force, when piston head distortion recovers, liquid pumpback and cause that the situation of blood back occurs.Top land is designed to thin-wall construction, can further be out of shape to stop top land to enter hollow channel by top land, avoids blood back.
Accompanying drawing explanation
Fig. 1 is front view of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is piston full sectional view of the present invention;
In figure, each label declaration is as follows:
1, sleeve, 2, push rod, 3, piston, 4, conehead, 5, hollow channel, 6, sleeve taper section, 7, top land, 8, piston retraction chamber, 9, piston thread, 10, push rod screw thread, 11, locking block.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
The pre-filled flushing syringe of a kind of blood return prevention type, comprises sleeve 1, push rod 2, piston 3, and described sleeve 1 far-end has the conehead 4 of connecting duct, the hollow channel 5 that conehead 4 has liquid to flow out, and sleeve 1 top forms sleeve taper section 6 in 5 mouthfuls of both sides of hollow channel; Piston 3 is connected with push rod 2, is sleeved in sleeve 1; Piston 3 and sleeve 1 inwall form the chamber of filling liquid; Described top land 7 is tapered structure, the salable hollow channel 5 of top land 7, and top land 7 is 0-5 ° with the angle of sleeve taper section 6 contact sites.Between described top land 7 and push rod 2, have a piston retraction chamber 8, top land 3 is thin-wall construction.Be processed with piston thread 9 in the inner side of piston base, piston 3 is by piston thread 9 and fastening the linking together of push rod screw thread 10.
The angle (as shown in angle a in Fig. 2) of top land 7 and sleeve taper section 6 contact portions is between 0 ~ 5 degree.This has guaranteed that top land 7 being shifted onto to sleeve 1 foremost time, both fit completely.Therefore can not produce blood back, avoid producing the risk of blood clotting.
In sum, the present invention requires the angle of top land 7 and sleeve taper section 6 contact portions between 0 ~ 5 degree, can effective anti-return blood phenomenon occur.
Claims (2)
1. the pre-filled flushing syringe of blood return prevention type, comprises sleeve, push rod, piston, and described sleeve far-end has the conehead of connecting duct, the hollow channel that has liquid to flow out in conehead, and upper cartridge forms sleeve taper section in hollow channel mouth both sides; Piston is connected with push rod, is sleeved in sleeve; Piston and sleeve lining form the chamber of filling liquid; Described top land is tapered structure, the salable hollow channel of top land, and the angle of top land and sleeve taper section contact site is 0-5 °, has a piston retraction chamber between described top land and push rod, top land is thin-wall construction.
2. the pre-filled flushing syringe of blood return prevention type according to claim 1, is characterized in that, is processed with piston thread in the inner side of piston base, and piston links together by piston thread and push rod screw threads for fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310114667.XA CN103170035B (en) | 2013-04-03 | 2013-04-03 | Blood-return-preventing pre-filling pipe-washing syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310114667.XA CN103170035B (en) | 2013-04-03 | 2013-04-03 | Blood-return-preventing pre-filling pipe-washing syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103170035A CN103170035A (en) | 2013-06-26 |
| CN103170035B true CN103170035B (en) | 2014-07-09 |
Family
ID=48630504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310114667.XA Active CN103170035B (en) | 2013-04-03 | 2013-04-03 | Blood-return-preventing pre-filling pipe-washing syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103170035B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656804A (en) * | 2014-01-08 | 2014-03-26 | 山东威高集团医用高分子制品股份有限公司 | Piston for injector |
| WO2015150646A1 (en) * | 2014-04-02 | 2015-10-08 | Aptar Stelmi Sas | Anti-reflux syringe assembly |
| CN108837236A (en) * | 2018-05-10 | 2018-11-20 | 山东威高集团医用高分子制品股份有限公司 | The pre-filled flushing syringe of anti-blood back |
| CN110025850A (en) * | 2019-05-07 | 2019-07-19 | 中国人民解放军第四军医大学 | A kind of pre-filled flushing syringe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203227095U (en) * | 2013-04-03 | 2013-10-09 | 山东威高集团医用高分子制品股份有限公司 | Blood returning prevention type pre-filling type washpipe injector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1180377A1 (en) * | 2000-08-16 | 2002-02-20 | Schering Aktiengesellschaft | Syringe with piston |
| US20050063857A1 (en) * | 2003-09-23 | 2005-03-24 | Alheidt Thomas A. | Flush syringe having anti-reflux stopper |
| CN201366150Y (en) * | 2009-03-25 | 2009-12-23 | 深圳市安特高科实业有限公司 | High-pressure syringe piston |
| CN201505341U (en) * | 2009-08-28 | 2010-06-16 | 沈立秋 | a rubber piston |
-
2013
- 2013-04-03 CN CN201310114667.XA patent/CN103170035B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203227095U (en) * | 2013-04-03 | 2013-10-09 | 山东威高集团医用高分子制品股份有限公司 | Blood returning prevention type pre-filling type washpipe injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103170035A (en) | 2013-06-26 |
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