CN207722180U - Fluid injects pressure and controls syringe - Google Patents
Fluid injects pressure and controls syringe Download PDFInfo
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- CN207722180U CN207722180U CN201720252713.6U CN201720252713U CN207722180U CN 207722180 U CN207722180 U CN 207722180U CN 201720252713 U CN201720252713 U CN 201720252713U CN 207722180 U CN207722180 U CN 207722180U
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Abstract
The utility model is related to a kind of fluid injection pressure to control syringe, be that a kind of suppressed range using the spring body for possessing certain spring ratio changes, the portable device of fluid pressure value situation of change in reaction injection device cavity or in its short distance linker body.Its critical piece includes syringe cavity, the push rod with sealing-plug, spring body, piston guide post body (guide post surface is containing pressure scale or pressure range information), helmet.Physical principle one used：P=(F1+F2)/S；Physical principle two：F1=K (L0‑L).P is that piston leads pressure suffered by cylinders contact fluid surface；F1For spring body compression reaction force；F2For the force of sliding friction (can be ignored when smaller) of piston guide post body piston portion and wall；S is piston guide post body piston cross-section.K is spring body coefficient of elasticity, L0It is grown for spring original, L is length after compression.The device can be widely applied to the related fields such as clinical treatment fluid pressure control.
Description
Technical field：
The utility model is related to medical instruments field, especially fluids to inject pressure control aspect.
Background technology：
With being constantly progressive for medical science and technology, syringe is often needed to use during medicinal practice or medical therapy
Injecting fluid substance (air, liquid, body filler etc.).It is needed in many medical department fields when injecting corresponding fluids
It controls fluid and injects pressure, or pressure is injected by fluid and judges whether medical procedure is safe and effective.
In terms of anaesthetizing airway management, for example, common band capsule trachea cannula, inflatable laryngeal mask, bronchial cannula, band capsule
Tracheostomy tube etc. is required for being inflated corresponding air flue closure sacculus with syringe, and ensures sacculus internal pressure strength
Within a certain range, cannot it is excessively high can not be too low (too low, cannot block completely, excessively high to have damage to airway walls).Mesh
Preceding clinical staff is to the control of sacculus pressure mainly by two aspects：Method one is connected after being inflated for the first time using syringe
Gas pressure intensity table detects, and checks whether to close mark, and then carrying out inflation/deflation with syringe again adjusts bladder pressure.Method second is that, it is first
The external instruction sacculus pressure for touching and being communicated with sacculus is pinched by finger after secondary inflation, then judges whether standard.Its shortcoming exists
In method one need to connect corresponding detection device, rescue time cumbersome and that adjustment waste is raced against time repeatedly.The deficiency of method two
Place is, touched with feel pinch it is nonstandard, it is random strong, in addition also need charge and discharge repeatedly to adjust, it is cumbersome to waste time.
In nerve block for treatment field, ideal drug injection position is nerve tract periphery, needle point be pierced into nerve tract or
When the injection of person's nerve tract superficial, neurotrosis can be caused, it is serious to cause the permanent functional defect of nerve.Clinical research is demonstrate,proved
Real, pressure demand is more than 15psi when injection in nerve tract；The injection pressure demand of needle point contact nerve tract superficial is the overwhelming majority
(97%) in 15psi；In neural nearly all (away from nerve tract 1mm) injection, pressure demand is less than 15psi.Research confirms rationally nerve
Peripheral injection position pressure demand is not more than 4psi.Clinical way relatively advanced at present is in the close god of excusing from death guiding injection needle
Under the premise of beam, an external pressure monitoring device, is then injected on the injector, is further judged by injecting pressure
Rational injection position.The shortcoming of this way is cumbersome, is wasted time, and cost is also higher.
In Minimally Interventional Therapy field, can generally use to balloon dilatation pressure pump at present, shape similar to large syringe,
There are one pointer pressure gauge or digital display pressure gauges for front.Its shortcoming is that production cost is relatively high.
Utility model content：
The purpose of this utility model be for existing solution there are the problem of and a kind of more convenient and quicker for designing, knot
Structure is simple, and low-cost fluid injection pressure controls syringe.
To realize that the technology that the utility model is taken is arranged：
Fluid injects pressure and controls syringe, including (main cavity front end includes one and is connected to main chamber syringe cavity
Secondary chamber), the push rod with sealing-plug；Spring body and piston guide post body (guide post surface is containing pressure scale or pressure range information) are located at
The secondary intracavitary of front end of the syringe needle；Spring body is sleeved on the guide post of piston guide post body；Trepanning helmet is fastened on syringe cavity front end
The end of secondary chamber.
Syringe main cavity front includes secondary cavity, and secondary cavity and syringe main cavity constitute linker relationship.
There are the metal for possessing certain spring ratio or nonmetallic spring body in the secondary cavity of syringe front.
There is sealing piston guide post body in the secondary cavity of syringe front, it is not outer for sealing fluid to main cavity
It overflows, and for compressing and fettering the spring body in secondary cavity.
When the piston portion of the piston guide post body in secondary cavity is by arriving to the fluid pressure of main cavity, piston is led
Slidably simultaneously compressed spring body, the guide post part of piston guide post body can be leant out cylinder by the hole on helmet in secondary cavity,
With the raising of fluid pressure in cavity, spring body suppressed range increases, and the guide post part of piston guide post body leans out helmet amplitude
Also it increases.
Main physical principle one：P=(F1+F2)/S；Physical principle two：F1=K (L0-L).P is that piston leads cylinders contact stream
Pressure suffered by dignity；F1For spring body compression reaction force；F2For piston guide post body piston portion and wall force of sliding friction (compared with
Hour is negligible)；S is piston guide post body piston cross-section.K is spring body coefficient of elasticity, L0It is grown for spring original, L is after compressing
Length.
Description of the drawings：
Fig. 1 is that fluid injects the appearance diagram that pressure controls syringe under natural conditions；
Fig. 2 is that fluid injects the cross-sectional view that pressure controls syringe under natural conditions；
Fig. 3 is that fluid injects pressure control front end of the syringe needle cut-away section structure enlargement diagram under natural conditions；
Fig. 4 is that fluid injects the appearance diagram that pressure controls syringe after internal flow pressure increases；
Fig. 5 is that fluid injects the cross-sectional view that pressure controls syringe after internal flow pressure increases；
Fig. 6 is that fluid injects pressure control front end of the syringe needle cut-away section structure amplification signal after internal flow pressure increases
Figure；
Fig. 7 is nature lower piston guide post body, spring body, helmet assembling structure and structural profile illustration；
Fig. 8 is piston guide post body after internal flow pressure increases, spring body, helmet structure and structural profile illustration；
Fig. 9 is piston guide post body guide post surface pressure scale implementation schematic diagram；
Figure 10 is syringe cavity sight and structural profile illustration in vitro.
Specific implementation mode：
It is that a kind of fluid provided by the utility model injects appearance and structure that pressure controls syringe as shown in Figure 1 and Figure 2
Schematic diagram, including syringe cavity 1, the push rod 2 with sealing-plug, (guide post surface contains pressure scale or pressure model to piston guide post body 3
Enclose information and see Fig. 9), helmet 4, spring body 5；As shown in Figure 10, syringe cavity 1 includes that a main chamber 11 and one are located at end side
Secondary chamber 12, and main chamber 11 and secondary chamber 12 pass through the hole 13 of 12 bottom of secondary chamber and constitute linker structure；Such as Fig. 3, Fig. 7, figure
Shown in 10, piston guide post body 3 is placed in the secondary chamber 12 of 1 end side of syringe cavity, and the piston 31 of piston guide post body and secondary chamber
12 cavity walls are rationally bonded, and ensure that fluid will not be excessive by secondary chamber 12 in main chamber 11 in design pressure range, and piston 31 and pair
The cavity wall force of sliding friction of chamber 12 is in scope of design；As shown in fig. 7, spring body 5 is placed on the guide post part 32 of piston guide post body
On, and by the constraint of helmet 4 and piston guide post body piston 31；As shown in fig. 7, the guide post part 32 of piston guide post body can pass through
Hole above helmet 4 is leant out；As shown in Fig. 7 Fig. 8, the 32 diameter D of guide post of piston guide post body1, the top hole diameter of helmet 4
D2, the diameter D of spring body 53, the 31 diameter D of piston of piston guide post body4, there is following relationship D1＜ D2＜ D3＜ D4；Such as Fig. 1, Figure 10
Shown, helmet 4 is anchored on the protruding parts 15 of the secondary chamber 12 of front end of the syringe needle；As shown in Fig. 2, Figure 10, the push rod 2 with sealing-plug
Be placed in the main chamber 11 of syringe cavity 1, after by external force can in main chamber 11 front and back push-and-pull move.
Mainly utilize physical principle one：P=(F1+F2)/S；Physical principle two：F1=K (L0-L).P lives for piston guide post body
Piston part position 31 contacts pressure suffered by fluid surface；F1For 5 compression reaction force of spring body；F2For piston guide post body piston portion 31 and pair
The force of sliding friction (can be ignored when smaller) of wall in chamber 12；S is the sectional area of piston guide post body piston region 31.K is spring
The coefficient of elasticity of body 5, L0It is grown for spring body original, L is length after compression.
Above-mentioned relation is embodied in：Push rod 2 with sealing-plug is pushed ahead, and fluid pressure increases in syringe cavity 1,
The piston portion 31 of piston guide post body 3 is acted on by fluid pressure, and 3 forced-slip of piston guide post body and compressed spring body 5, piston is led
The guide post part 32 of cylinder 3 is gone out by 4 top-portion apertures exploratory tunnel excavating of helmet.
In use, first pulling the push rod 2 with sealing-plug, institute is sucked by the external-connected port 14 (Figure 10) on syringe cavity
Need fluid；External-connected port 14 is bonded with other relevant apparatus or instrument the corresponding interface；Then lasting to push with sealing-plug
Push rod 2, the rising transition of the guide post part 32 of observation piston guide post body 3, and coordinate pressure information (Fig. 9 institutes on guide post 32
Show), rationally judge to apply according to clinical application field.
Claims (7)
1. a kind of new fluid injection pressure controls syringe, it is characterised in that the syringe possesses main cavity and is located at main cavity
The secondary cavity of front end, and main cavity and secondary cavity constitute linker structure；Injector push-rod, the piston of push rod front end is pushed to push
And the fluid in main cavity is compressed, the pressure of fluid is transmitted in the secondary cavity for constituting linker structure in main cavity, and is acted on
In secondary intracavitary piston body lower surface, pushes secondary intracavitary piston mobile and compress the spring body for being located at secondary intracavitary；Indicative function is led
Cylinder and the piston of secondary intracavitary are linked together and constitute piston guide post body, and spring body is sleeved on guide post body and one end is placed in secondary intracavitary and lives
The upper surface of plug, and it is positioned over secondary intracavitary, it is used in combination secondary chamber helmet with holes to be enclosed in secondary intracavitary；Secondary intracavitary piston is in secondary bottom of chamber portion
When its upper surface to tightening state under the distance between secondary chamber helmet it is long for the original of spring body；It lives when fluid pressure is more than secondary intracavitary
The suppressed range of spring body is as the pressure of fluid in cavity increases and decreases and changes after pressure needed for plug sliding, while playing instruction
The guide post of effect can be leant out or withdraw from the trepanning on helmet, include the pressure scale value either pressure of setting on guide post
Range information；Its critical piece includes syringe cavity, the push rod with sealing piston, spring body, helmet, and piston and instruction are led
Column；Main physical principle one：P=(F1+F2)/S；Main physical principle two：F1=K (L0-L)；P is secondary intracavitary piston contact stream
Pressure suffered by dignity；F1For spring body compression reaction force；F2 is the force of sliding friction of secondary intracavitary piston region and wall；S is
Secondary intracavitary piston cross-section；K is spring body coefficient of elasticity, L0It is grown for spring original, L is length after compression.
2. fluid injection pressure as described in claim 1 controls syringe, it is characterised in that wrap its syringe main cavity front
Containing secondary cavity, secondary cavity and syringe main cavity constitute linker relationship.
3. fluid injection pressure as described in claim 1 controls syringe, it is characterised in that be located at the secondary chamber of syringe front
There are the metal for possessing certain spring ratio or nonmetallic spring body in vivo.
4. fluid injection pressure as described in claim 1 controls syringe, it is characterised in that be located at the secondary chamber of syringe front
There are piston and instruction guide post in vivo, it is not excessive for sealing fluid to main cavity, and for compressing and fettering in secondary cavity
Spring body.
5. fluid injection pressure as described in claim 1 controls syringe, it is characterised in that be located at the secondary chamber of syringe front
There are one fastening helmets for the end of body, and have suitable dimension hole on helmet, and the diameter in hole is more than the guide post of instruction guide post body
Section diameter, and less than the diameter of spring body.
6. fluid injection pressure as described in claim 1 controls syringe, it is characterised in that the piston portion of piston guide post body is cut
Face diameter is more than spring body diameter.
7. fluid injection pressure as described in claim 1 controls syringe, it is characterised in that when the piston in secondary cavity
When the piston portion of guide post body is by arriving to the Fluid pressure of main cavity, piston guide post body slidably and compresses bullet in secondary cavity
Spring body, the guide post part of piston guide post body can be leant out by fastening the hole on helmet, with the raising of fluid pressure in cavity,
Spring body suppressed range increases, and the guide post part of piston guide post body leans out helmet amplitude and also increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720252713.6U CN207722180U (en) | 2017-03-16 | 2017-03-16 | Fluid injects pressure and controls syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720252713.6U CN207722180U (en) | 2017-03-16 | 2017-03-16 | Fluid injects pressure and controls syringe |
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| Publication Number | Publication Date |
|---|---|
| CN207722180U true CN207722180U (en) | 2018-08-14 |
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ID=63089429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720252713.6U Active CN207722180U (en) | 2017-03-16 | 2017-03-16 | Fluid injects pressure and controls syringe |
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| CN (1) | CN207722180U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109718409A (en) * | 2019-02-19 | 2019-05-07 | 重庆山外山血液净化技术股份有限公司 | Heparin pump polytypic syringe monitoring and control method and control system |
-
2017
- 2017-03-16 CN CN201720252713.6U patent/CN207722180U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109718409A (en) * | 2019-02-19 | 2019-05-07 | 重庆山外山血液净化技术股份有限公司 | Heparin pump polytypic syringe monitoring and control method and control system |
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