CN209154745U - A kind of negative-pressure type venous detaining needle - Google Patents
A kind of negative-pressure type venous detaining needle Download PDFInfo
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- CN209154745U CN209154745U CN201821602023.XU CN201821602023U CN209154745U CN 209154745 U CN209154745 U CN 209154745U CN 201821602023 U CN201821602023 U CN 201821602023U CN 209154745 U CN209154745 U CN 209154745U
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- connector
- negative
- backshank
- extension tube
- negative pressure
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Abstract
The utility model relates to a kind of negative-pressure type venous detaining needles, including indwelling needle assembly, extension tube, adjust buckle and backshank device, one end of extension tube is arranged in the indwelling needle assembly, the other end of the extension tube is provided with backshank device, adjusting is fastened in extension tube, negative pressure trough is provided in the backshank device, the positive pressure connector of forked arrangement is additionally provided on backshank device, calparine cap connector and air groove, positive pressure connector, calparine cap connector and air groove are respectively arranged with one-way valve structure close to one end of extension tube, the space adjusted between buckle and three one-way valve structures constitutes negative pressure trough；And adjusting the original state being clipped in the space of calparine cap connector, positive pressure connector and air groove is negative pressure state.The negative-pressure type venous detaining needle provided in above-mentioned technical proposal, structure is simple, easy to use, can effectively solve the problem existing in the prior art for needing exhaust liquid, leakage, puncture success rate low and inconvenient for operation.
Description
Technical field
The utility model relates to the field of medical instrument technology, and in particular to a kind of negative-pressure type venous detaining needle.
Background technique
Venous detaining needle is also known as venous catheter needle, is the needle core by stainless steel, soft outer tube and plastics needle stand composition, wears
Outer tube and needle core are pierced into blood vessel together when thorn, after casing is sent into blood vessel, needle core is extracted out, only stays soft outer tube
A kind of infusion tool being infused in the blood vessel.But the venous detaining needle clinically now used does not have the disadvantage in that 1. not
Using exhaust liquid Direct perforantes, operating principle is violated, air embolism is easily led to, than relatively hazardous；2. using being worn after exhaust liquid
Thorn, that is, turn off all valves and also still remain the phenomenon of leakage；3. puncture success rate is low；4. connecting perfusion tube when operation, hold
It is inconvenient.Therefore, it needs to design a kind of new technical solution, solves problems of the prior art with comprehensive.
Utility model content
The purpose of the utility model is to provide a kind of negative-pressure type venous detaining needles, and structure is simple, easy to use, can be effective
It solves the problems, such as existing in the prior art to need exhaust liquid, leakage, puncture success rate low and inconvenient for operation.
In order to solve the above technical problems, the utility model uses following technical scheme:
A kind of negative-pressure type venous detaining needle, including indwelling needle assembly, extension tube, adjusting buckle and backshank device, the indwelling
One end of extension tube is arranged in needle assemblies, and the other end of the extension tube is provided with backshank device, and the adjusting, which is fastened on, prolongs
On long tube, it is provided with negative pressure trough in the backshank device, positive pressure connector, the calparine cap of forked arrangement are additionally provided on the backshank device
Connector and air groove, the positive pressure connector, calparine cap connector and air groove are respectively arranged with close to one end of extension tube
One-way valve structure, the space adjusted between buckle and three one-way valve structures constitute negative pressure trough.
Further scheme is that the one-way valve structural openings direction in the calparine cap connector is by calparine cap tip side
It is directed toward negative pressure trough end；One-way valve structural openings direction in the positive pressure connector is that negative pressure trough end is directed toward at positive pressure connector end；Institute
Stating the one-way valve structural openings direction in air groove is that air groove end is directed toward at negative pressure trough end.
Further scheme is that the adjusting is clipped in the space of calparine cap connector, positive pressure connector and air groove
Original state be negative pressure state.
The negative-pressure type venous detaining needle provided in above-mentioned technical proposal changes the backshank device of original venous detaining needle
Into by adding negative pressure trough, one-way valve structure and air groove in backshank device, so that the original state in backshank device is negative pressure
State directly uses after can remove outer packing when taking venous detaining needle, without exhaust, because being arranged without connecting perfusion tube
Gas, so that the hand-held simpler convenience of puncture procedure；In addition the setting of negative pressure trough also makes after puncturing successfully blood back very
Obviously, and after blood flows into negative pressure trough, the setting of one-way valve structure is so that blood rests at one-way valve structure；Most
Afterwards after positive pressure connector is connected to liquid, liquid runs down one-way valve structure is flowed into, and liquid or blood are merged with the blood of reflux, into
And carry out normal infusion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of negative-pressure type venous detaining needle described in the utility model；
Fig. 2 is the structural schematic diagram of one-way valve structure in backshank device described in the utility model.
In figure: 1, indwelling needle assembly；2, extension tube；3, buckle is adjusted；4, backshank device；41, calparine cap connector；42, positive pressure
Connector；43, air groove；44, negative pressure trough；45, one-way valve structure.
Specific embodiment
In order to which the purpose of this utility model and advantage is more clearly understood, with reference to embodiments to the utility model into
Row illustrates.It should be appreciated that following text is only used to one or more of specific embodiments of description the utility model,
Considered critical is not carried out to the protection scope that the utility model is specifically requested.
The technical solution that the utility model is taken is as shown in Figure 1 and Figure 2, a kind of negative-pressure type venous detaining needle, including remaining needle
One end of extension tube 2, the extension is arranged in component 1, extension tube 2, adjusting buckle 3 and backshank device 4, the indwelling needle assembly 1
The other end of pipe 2 is provided with backshank device 4, and the adjusting buckle 3 is fastened in extension tube 2, is provided with negative pressure in the backshank device 4
Slot 44 is additionally provided with the positive pressure connector 42, calparine cap connector 41 and air groove 43 of forked arrangement on the backshank device 4, described
Positive pressure connector 42, calparine cap connector 41 and air groove 43 are respectively arranged with one-way valve structure close to one end of extension tube 2
45, the space adjusted between buckle 3 and three one-way valve structures 45 constitutes negative pressure trough 44；It is set using principle of negative pressure
The negative-pressure type venous detaining needle of meter, can directly be punctured, solve in existing operation must exhaust liquid could puncture
Problem both ensure that the safety of puncture, and also simplify piercing step.
As shown in Fig. 2, the one-way valve structural openings direction in the calparine cap connector 41 is by 41 end of calparine cap connector
It is directed toward 44 end of negative pressure trough；One-way valve structural openings direction in the positive pressure connector 42 is that negative pressure trough is directed toward at 42 end of positive pressure connector
44 ends；One-way valve structural openings direction in the air groove 43 is that 43 end of air groove is directed toward at 44 end of negative pressure trough；In original needle
Negative pressure trough and each one-way valve structure are added on the basis of cercoids, wherein the negative pressure value in negative pressure trough -125mmHg~-
Within the scope of 450mmHg, the volume of negative pressure trough can be 15 × π × 0.22cm3+10×π×0.12cm3, utilize each one-way valve knot
The one-way flow general character of structure, guarantees the compactness of each valve, reduces the leakage of liquid.
More specifically scheme is the adjusting buckle 3 to calparine cap connector 41, positive pressure connector 42 and air groove 43
Original state in space is negative pressure state；(negative pressure value is in -125mmHg~-450mmHg model for negative pressure trough and negative pressure state
In enclosing) setting increase puncture success rate so that blood back is obvious after puncturing；Each one-way valve structure respectively with heparin
Space between cap connector 41 and positive pressure connector 42 is negative pressure state, and the blood convenient for liquid and reflux in infusion apparatus is fast
Speed fusion.
It is specifically used the following steps are included: opening after syringe needle punctures and adjusting buckle, blood is past under the action of negative pressure
The flowing of backshank device end, syringe needle and extension inner air tube are influenced to flow in air groove by one-way valve structure, in negative pressure trough
It all drains into close in air groove full of blood, air and adjusts buckle；In calparine cap connector later or positive pressure connector and infusion apparatus
When connection, liquid flows into negative pressure trough by one-way valve structure, and liquid is merged with the blood of reflux at this time, carries out normal infusion and is
It can.
In short, negative-pressure type venous detaining needle provided by the utility model, by adding negative pressure trough, unidirectional valve in backshank device
Membrane structure and air groove, so that the original state in backshank device is negative pressure state, so that the negative-pressure type vein of the utility model stays
Setting needle and being not required to exhaust liquid just can be used directly, so that hand-held puncture procedure is more convenient；The setting of negative pressure trough is so that wear
Blood back after the completion of thorn is quickly obvious, convenient for observation；After last calparine cap tip side or positive pressure connector terminate liquid, liquid with
The blood of reflux merges, and then is infused.
Note: in the specific implementation process, calparine cap can also be arranged in air groove end, it is ensured that in one-time puncture
In unsuccessful situation, negative pressure state is manufactured manually with syringe, and then carry out secondary puncture.
The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to
Above embodiment, for those skilled in the art, in knowing the utility model after contents,
Under the premise of not departing from the utility model principle, several same transformation and substitution can also be made to it, these same transformation and
Substitution also should be regarded as belonging to the protection scope of the utility model.
Claims (3)
1. a kind of negative-pressure type venous detaining needle, including indwelling needle assembly (1), extension tube (2), adjusting buckle (3) and backshank device
(4), the indwelling needle assembly (1) is arranged in one end of extension tube (2), and the other end of the extension tube (2) is provided with backshank device
(4), the adjusting buckle (3) is fastened on extension tube (2), it is characterised in that: is provided with negative pressure trough in the backshank device (4)
(44), the positive pressure connector (42), calparine cap connector (41) and air groove of forked arrangement are additionally provided on the backshank device (4)
(43), the positive pressure connector (42), calparine cap connector (41) and air groove (43) are set respectively close to the one end of extension tube (2)
It is equipped with one-way valve structure (45), the space adjusted between buckle (3) and three one-way valve structures (45) is constituted
Negative pressure trough (44).
2. negative-pressure type venous detaining needle according to claim 1, it is characterised in that: the list in the calparine cap connector (41)
It is to be held to be directed toward negative pressure trough (44) end by calparine cap connector (41) to valve structure opening direction；List in the positive pressure connector (42)
It is that negative pressure trough (44) end is directed toward at positive pressure connector (42) end to valve structure opening direction；One-way valve in the air groove (43)
Structural openings direction is that air groove (43) end is directed toward at negative pressure trough (44) end.
3. negative-pressure type venous detaining needle according to claim 1, it is characterised in that: the adjusting buckle (3) to calparine cap
Original state in the space of connector (41), positive pressure connector (42) and air groove (43) is negative pressure state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602023.XU CN209154745U (en) | 2018-09-29 | 2018-09-29 | A kind of negative-pressure type venous detaining needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602023.XU CN209154745U (en) | 2018-09-29 | 2018-09-29 | A kind of negative-pressure type venous detaining needle |
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| Publication Number | Publication Date |
|---|---|
| CN209154745U true CN209154745U (en) | 2019-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821602023.XU Active CN209154745U (en) | 2018-09-29 | 2018-09-29 | A kind of negative-pressure type venous detaining needle |
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| CN (1) | CN209154745U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113995486A (en) * | 2021-12-20 | 2022-02-01 | 张洪阳 | Arteriovenous puncture sensitivity-improving balloon indwelling needle |
| CN114470410A (en) * | 2022-01-26 | 2022-05-13 | 江苏大学附属医院 | Anti-blocking vein indwelling needle for children |
-
2018
- 2018-09-29 CN CN201821602023.XU patent/CN209154745U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113995486A (en) * | 2021-12-20 | 2022-02-01 | 张洪阳 | Arteriovenous puncture sensitivity-improving balloon indwelling needle |
| CN114470410A (en) * | 2022-01-26 | 2022-05-13 | 江苏大学附属医院 | Anti-blocking vein indwelling needle for children |
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