CN108837236A - The pre-filled flushing syringe of anti-blood back - Google Patents
The pre-filled flushing syringe of anti-blood back Download PDFInfo
- Publication number
- CN108837236A CN108837236A CN201810445402.0A CN201810445402A CN108837236A CN 108837236 A CN108837236 A CN 108837236A CN 201810445402 A CN201810445402 A CN 201810445402A CN 108837236 A CN108837236 A CN 108837236A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- piston
- baffle
- rear end
- 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.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
Abstract
The present invention provides a kind of pre-filled flushing syringe of anti-blood back, including sleeve, push rod and piston, the barrel forward end is equipped with sleeve taper section, the middle part of sleeve taper section is equipped with the conehead of connecting conduit, there is hollow channel in the middle part of conehead, the outside of conehead is equipped with helmet, and piston is connected with push rod front end, is sleeved in sleeve；Piston and sleeve lining form the chamber of filling liquid；Top land is the tapered structure matched with sleeve taper section, the rear end end vertical of push rod is equipped with circle handle, circle handle lower end is equipped with the baffle parallel with circle handle, the diameter of baffle is greater than the internal diameter of sleeve, it is connected between circle handle and baffle by upper braced wing, after injection, top land is in contact with sleeve taper section inner sidewall, and baffle is in contact with sleeve rear end.The beneficial effects of the invention are as follows baffles, and push rod continuation can be stopped to push piston forward, prevents piston from deforming, thus anti-return blood.
Description
Technical field
The invention belongs to medical instruments fields, are related to a kind of syringe more particularly to a kind of pre-filled washing pipe note of anti-blood back
Emitter.
Background technique
Formula flushing syringe is rushed in advance to be suitable in the gap that different pharmaceutical is treated, for rinsing, closing ductus venosus.Tradition
The pre- formula flushing syringe that rushes advanced exhaust is needed before use, it is living at the end of using rushing formula flushing syringe in advance and rinsing
Plug top is squeezed to the conehead inner wall of sleeve, and top land is bonded completely with conehead inner wall or most of fitting, suffered by piston
Power makes top land deform the hollow channel for going deep into sleeve conehead.When removing external force, when piston head recoverable force, hollow channel
It is interior to generate negative pressure to which blood return phenomenon occur, harm is generated to patient.
Application number：201310114667.X discloses a kind of pre-filled flushing syringe of anti-blood back type, including sleeve, pushes away
Bar, piston, the hub distal end have the conehead of connecting conduit, and the hollow channel for having liquid to flow out in conehead, upper cartridge is in
Empty passway two sides form sleeve taper section；Piston is connect with push rod, is sleeved in sleeve；Piston and sleeve lining form filling liquid
The chamber of body；The top land is tapered structure, and the salable hollow channel of top land, top land contacts with sleeve taper section
The angle in portion is 0-5 °.Blood back can be effectively prevented in the pre- formula flushing syringe that rushes of the structure, enhances safety in utilization.
Summary of the invention
The object of the present invention is to provide a kind of structures, and anti-blood back simple, that anti-blood back effect is good, production cost is low is pre-filled
Flushing syringe.
The technical scheme is that：The pre-filled flushing syringe of anti-blood back, including sleeve, push rod and piston, the set
Cylinder front end is equipped with sleeve taper section, and the middle part of sleeve taper section is equipped with the conehead of connecting conduit, has hollow channel, conehead in the middle part of conehead
Outside be equipped with helmet, piston is connected with push rod front end, is sleeved in sleeve；Piston and sleeve lining form filling liquid
Chamber；Top land is the tapered structure matched with sleeve taper section, and the rear end end vertical of push rod is equipped with circle handle, circle handle lower end
Equipped with the baffle parallel with circle handle, the diameter of baffle is greater than the internal diameter of sleeve, passes through upper braced wing phase between circle handle and baffle
Connection, after injection, top land is in contact with sleeve taper section inner sidewall, and baffle is in contact with sleeve rear end.
After injection, baffle is in contact with sleeve rear end, push rod can be prevented to move forward, to prevent piston
Deformation occurs enters in the hollow channel in the middle part of conehead, to prevent that negative pressure can be generated when piston recoverable force in hollow channel
To which blood return phenomenon occur.
To be connected by lower braced wing between piston and baffle, lower braced wing upper end diameter is greater than lower braced wing lower end
Diameter is equipped with bevel edge between upper braced wing upper end and upper braced wing lower end, the inner sidewall of sleeve rear end is equipped with to match with bevel edge
The snap ring of conjunction, after injection, snap ring is in contact with bevel edge rear end.
Bevel edge is matched with snap ring, can also prevent piston from entering inside hollow channel.
The rear end of sleeve is vertically equipped with jacket bottom, and inner circle and the sleeve rear end of jacket bottom are vertically connected, jacket bottom
Outer rim be greater than baffle diameter.
The section of the upper braced wing and lower braced wing is respectively cross.
The section of braced wing may be other centered on axis, and circumference radiates uniformly distributed other shapes.
The front end of push rod, which is equipped with, has externally threaded bolt, and the rear end of piston is equipped with the internal screw thread matched with bolt, spiral shell
It is threadedly coupled between bolt and piston.
The invention has the advantages and positive effects that：At the end of medical fluid injection, baffle and jacket bottom flat face
Touching, lower braced wing bevel edge are in contact with sleeve lining snap ring, and piston is prevented to be pushed further into, and prevent top land from entering hollow logical
Road, the case where generating interaction force so as to avoid piston crown and sleeve conehead, make liquid pumpback and cause blood back generation.
In addition, the anti-blood back mode does not require sleeve tapering angle, be conducive to be vented.
Detailed description of the invention
Fig. 1 is the pre-filled flushing syringe structural schematic diagram of anti-blood back of the invention
Fig. 2 is that the pre-filled flushing syringe of anti-blood back of the invention uses front cross sectional view
Fig. 3 is that the pre-filled flushing syringe of anti-blood back of the invention uses rear cross-sectional view
In figure：
1, helmet 2, sleeve 3, piston 4, push rod
5, push rod screw thread 6, circle handle 7, baffle 8, upper braced wing
9, lower braced wing 10, bevel edge 11, snap ring 12, jacket bottom
Specific embodiment
As shown in Figure 1 and Figure 2, the pre-filled flushing syringe of anti-blood back of the present invention, including sleeve 2, push rod 4 and piston 3, set
2 front ends of cylinder are equipped with sleeve 2 and bore section, and the middle part that sleeve 2 bores section is equipped with the conehead of connecting conduit, has hollow channel in the middle part of conehead,
The outside of conehead is equipped with helmet 1, and piston 3 is connected with 4 front end of push rod, is sleeved in sleeve 2；Piston 3 and 2 inner wall of sleeve are formed
The chamber of filling liquid；To bore the tapered structure that section matches with sleeve 2 at the top of piston 3, the rear end end vertical of push rod 4 is equipped with
Circle handle 6, circle 6 lower end of handle are equipped with the baffle 7 parallel with circle handle 6, and the diameter of baffle 7 is greater than the internal diameter of sleeve 2, circle handle 6 and gear
It is connected between piece 7 by upper braced wing 8, as shown in figure 3, section inner sidewall phase is bored with sleeve 2 in 3 top of piston after injection
Contact, baffle 7 are in contact with 2 rear end of sleeve.
After injection, baffle 7 is in contact with 2 rear end of sleeve, and push rod 4 can be prevented to move forward, to prevent
Deformation occurs enters in the hollow channel in the middle part of conehead for piston 3, to prevent to produce in hollow channel when 3 recoverable force of piston
Raw negative pressure is to occur blood return phenomenon.
As shown in figure 3, lower 9 upper end diameter of braced wing is greater than to be connected by lower braced wing 9 between piston 3 and baffle 7
The diameter of lower 9 lower end of braced wing, is equipped with bevel edge 10 between 9 lower end of upper 9 upper end of braced wing and upper braced wing, 2 rear end of sleeve it is interior
Side wall is equipped with the snap ring 11 matched with bevel edge 10, and after injection, snap ring 11 is in contact with 10 rear end of bevel edge.
Bevel edge 10 is matched with snap ring 11, also can prevent piston 3 from entering inside hollow channel.
The rear end of sleeve 2 is vertically equipped with jacket bottom 12, and inner circle and 2 rear end of sleeve of jacket bottom 12 are vertically connected, outside
The outer rim for covering bottom 12 is greater than the diameter of baffle 7.
The section of the upper braced wing 8 and lower braced wing 9 is respectively cross.
The section of upper braced wing 8 and lower braced wing 9 may be other centered on axis, and circumference radiates uniformly distributed other
Shape.
The front end of push rod 4, which is equipped with, has externally threaded bolt, and the rear end of piston 3 is equipped with the internal screw thread matched with bolt,
It is threadedly coupled between bolt and piston 3.
One embodiment of the present invention has been described in detail above, but the content is only preferable implementation of the invention
Example, should not be considered as limiting the scope of the invention.It is all according to all the changes and improvements made by the present patent application range
Deng should still be within the scope of the patent of the present invention.
Claims (5)
1. the pre-filled flushing syringe of anti-blood back, including sleeve, push rod and piston, the barrel forward end is equipped with sleeve taper section, set
The middle part of cylinder cone section is equipped with the conehead of connecting conduit, has hollow channel in the middle part of conehead, and the outside of conehead is equipped with helmet, piston with
Push rod front end is connected, and is sleeved in sleeve；Piston and sleeve lining form the chamber of filling liquid；Top land is and sleeve
The tapered structure that cone section matches, it is characterised in that：The rear end end vertical of push rod is equipped with circle handle, and circle handle lower end is equipped with and circle handle
Parallel baffle, the diameter of baffle are greater than the internal diameter of sleeve, are connected between circle handle and baffle by upper braced wing, have been injected
Bi Hou, top land are in contact with sleeve taper section inner sidewall, and baffle is in contact with sleeve rear end.
2. the pre-filled flushing syringe of anti-blood back according to claim 1, it is characterised in that：It is logical between piston and baffle
It crosses down braced wing to be connected, lower braced wing upper end diameter is greater than the diameter of lower braced wing lower end, upper braced wing upper end and upper support
Bevel edge is equipped between wing lower end, the inner sidewall of sleeve rear end is equipped with the snap ring matched with bevel edge, after injection, snap ring with
Bevel edge rear end is in contact.
3. the pre-filled flushing syringe of anti-blood back according to claim 1 or 2, it is characterised in that：The rear end of sleeve is vertical
Equipped with jacket bottom, inner circle and the sleeve rear end of jacket bottom are vertically connected, and the outer rim of jacket bottom is greater than the diameter of baffle.
4. the pre-filled flushing syringe of anti-blood back according to claim 3, it is characterised in that：The upper braced wing and lower branch
The section for supportting the wing is respectively cross.
5. the pre-filled flushing syringe of anti-blood back according to claim 4, it is characterised in that：The front end of push rod is equipped with and has
Externally threaded bolt, the rear end of piston are equipped with the internal screw thread matched with bolt, are threadedly coupled between bolt and piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810445402.0A CN108837236A (en) | 2018-05-10 | 2018-05-10 | The pre-filled flushing syringe of anti-blood back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810445402.0A CN108837236A (en) | 2018-05-10 | 2018-05-10 | The pre-filled flushing syringe of anti-blood back |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108837236A true CN108837236A (en) | 2018-11-20 |
Family
ID=64212962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810445402.0A Pending CN108837236A (en) | 2018-05-10 | 2018-05-10 | The pre-filled flushing syringe of anti-blood back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108837236A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114632222A (en) * | 2022-03-11 | 2022-06-17 | 李开雄 | Injector with bidirectional scales and setting method thereof |
| CN116350875A (en) * | 2023-02-01 | 2023-06-30 | 南京竹海生物科技有限公司 | Hose quick-connection annular-connection boosting type pre-filled catheter flusher |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170035A (en) * | 2013-04-03 | 2013-06-26 | 山东威高集团医用高分子制品股份有限公司 | Blood-return-preventing pre-filling pipe-washing syringe |
| CN203493977U (en) * | 2013-08-12 | 2014-03-26 | 山东新华安得医疗用品有限公司 | Injector for flushing catheter |
| US20140221923A1 (en) * | 2011-10-20 | 2014-08-07 | Baodong Bai | Self-destructing syringe with high level of safety and convenient assembly |
| CN204158798U (en) * | 2014-12-30 | 2015-02-18 | 江西丰临医用器械有限公司 | A kind of pre-filled catheter flusher of improvement |
| CN205055043U (en) * | 2015-09-02 | 2016-03-02 | 山东新华安得医疗用品有限公司 | Prevent back blood preliminary filling formula pipe flusher |
| CN209221192U (en) * | 2018-05-10 | 2019-08-09 | 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 |
-
2018
- 2018-05-10 CN CN201810445402.0A patent/CN108837236A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140221923A1 (en) * | 2011-10-20 | 2014-08-07 | Baodong Bai | Self-destructing syringe with high level of safety and convenient assembly |
| CN103170035A (en) * | 2013-04-03 | 2013-06-26 | 山东威高集团医用高分子制品股份有限公司 | Blood-return-preventing pre-filling pipe-washing syringe |
| CN203493977U (en) * | 2013-08-12 | 2014-03-26 | 山东新华安得医疗用品有限公司 | Injector for flushing catheter |
| CN204158798U (en) * | 2014-12-30 | 2015-02-18 | 江西丰临医用器械有限公司 | A kind of pre-filled catheter flusher of improvement |
| CN205055043U (en) * | 2015-09-02 | 2016-03-02 | 山东新华安得医疗用品有限公司 | Prevent back blood preliminary filling formula pipe flusher |
| CN209221192U (en) * | 2018-05-10 | 2019-08-09 | 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114632222A (en) * | 2022-03-11 | 2022-06-17 | 李开雄 | Injector with bidirectional scales and setting method thereof |
| CN116350875A (en) * | 2023-02-01 | 2023-06-30 | 南京竹海生物科技有限公司 | Hose quick-connection annular-connection boosting type pre-filled catheter flusher |
| CN116350875B (en) * | 2023-02-01 | 2023-11-14 | 南京竹海生物科技有限公司 | Hose quick-connection annular-connection boosting type pre-filled catheter flusher |
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