CN101644617B - Pressure detection method for injection pump - Google Patents
Pressure detection method for injection pump Download PDFInfo
- Publication number
- CN101644617B CN101644617B CN 200810117718 CN200810117718A CN101644617B CN 101644617 B CN101644617 B CN 101644617B CN 200810117718 CN200810117718 CN 200810117718 CN 200810117718 A CN200810117718 A CN 200810117718A CN 101644617 B CN101644617 B CN 101644617B
- Authority
- CN
- China
- Prior art keywords
- voltage value
- pressure
- value
- infusion pipeline
- sampling
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 34
- 239000007924 injection Substances 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000005070 sampling Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001802 infusion Methods 0.000 claims description 38
- 230000008569 process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a pressure detection method for an injection pump. The method comprises the following steps: 1, under the condition that an injector is filled with liquid and a liquid delivery pipe is opened, sampling pressure and acquiring a zero voltage value RP corresponding to a sampled pressure value; 2, connecting a water outlet end of the liquid delivery pipe to a pressure gauge, sampling a plurality of linear variable different pressures in the liquid delivery pipe, and acquiring a first voltage value P (1) to an ith voltage value P (i) corresponding to the plurality of different pressures; and 3, calculating a step length voltage value delta P by the zero voltage value RP, the first voltage value P (1) to the ith voltage value P (i) according to a predefined algorithm. Therefore, by introducing the delta P in the calculation of pressure detection, the method can acquire the voltage value RP corresponding to the zero voltage through the sampling of real-time pressure of the opened pipe, and then acquire accurate real-time pressure value of the pipe through the zero voltage so as to solve the problem that the pressure detection is inaccurate.
Description
Technical Field
The present invention relates to a pressure detection system, and more particularly, to a pressure detection method of an injection pump.
Background
Currently, on a syringe pump, there are two general methods for monitoring pressure values:
the method has the advantages that the monitored data are accurate, processing is not needed, and the current pressure value can be reflected in real time, but the method has the defects that medical personnel need to process the infusion pipeline independently when replacing the infusion pipeline, and meanwhile, the sensor device is arranged outside the machine, so that inconvenience is brought to safety protection and transportation of the machine; and
the sensor is placed in the injection tip or in the internal transmission mechanism to monitor the data in real time, which has the advantages of no interference problem and stable signal, and the defect that the monitored data is not the real data of the patient.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pressure detection method of an injection pump, which introduces delta P in the calculation of pressure detection and then obtains an accurate real-time pressure value of a pipeline through zero pressure, thereby solving the problem of inaccurate pressure detection.
In order to solve the above problems in the prior art, the present invention provides a method for detecting pressure of a syringe pump, comprising the steps of: under the conditions that the injector is filled with liquid and the infusion pipeline is opened, pressure sampling is carried out, and a zero voltage value RP corresponding to the sampled pressure value is obtained; connecting the water outlet end of the infusion pipeline to a pressure gauge, sampling a plurality of different pressures which change linearly in the infusion pipeline, and obtaining a first voltage value P (1) to an ith voltage value P (i) corresponding to the plurality of different pressures; and step three, calculating the step voltage value delta P according to a preset algorithm from the zero voltage value RP, the first voltage value P (1) to the ith voltage value P (i).
Wherein, step one still includes: putting the injector filled with liquid into an injection pump, and connecting an open infusion pipeline; under the calibration state, a motor of the injection pump starts to operate and pushes a piston in the injector to move; and sampling the pressure in the infusion pipeline under the condition that the infusion pipeline is opened, and storing a stable pressure value, wherein the voltage value corresponding to the stable pressure value is a zero voltage value RP.
The second step further comprises: putting the injector filled with liquid into an injection pump, and connecting the infusion pipeline with a pressure gauge after exhausting air in the infusion pipeline; the motor of the injection pump starts to operate in a calibration state to push the piston in the injector to move; and sampling a plurality of different pressures which linearly change in the infusion pipeline, and obtaining a first voltage value P (1) to an ith voltage value P (i) corresponding to the plurality of different pressures.
According to the method of the invention, the predetermined algorithm is:
ΔP(1)＝P(1)-PR；
ΔP(i)＝P(i)-P(i-1)；
ΔP＝(ΔP(1)+ΔP(2)+......+ΔP(N))/N
wherein,
n, N being an integer greater than or equal to 2; and P (1) to P
(i) Is a voltage sampling value with equal pressure intervals which are linearly changed.
In addition, the method further comprises: and step four, detecting the pressure in the infusion pipeline in real time in the normal injection process, and correspondingly controlling according to the step voltage value delta P and the threshold voltage value TP corresponding to the set pressure threshold value.
Wherein, step four still includes: reading the step voltage value delta P from the memory; setting a pressure threshold value, and setting a threshold voltage value TP according to the step voltage value delta P and the pressure threshold value; during normal injection, the motor of the injection pump starts to operate to push the piston in the injector to move; sampling the pressure in the infusion pipeline, and obtaining a working voltage value RealP corresponding to the sampled pressure; and comparing the difference between the working voltage value RealP and the zero voltage value RP with the threshold voltage value TP, and performing alarm processing when the difference is greater than the threshold voltage value TP.
The invention has the following beneficial effects:
therefore, by adopting the method of the invention, delta P is introduced in the calculation of pressure detection, the voltage value RP corresponding to the zero pressure can be obtained by sampling the real-time pressure of the open pipeline, and then the accurate real-time pressure value of the pipeline is obtained by the zero pressure, thereby solving the problem of inaccurate pressure detection.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method according to the present invention;
FIG. 2 is a flow chart of a real-time pressure sampling process when a pipeline is opened according to the method of the present invention;
FIG. 3 is a flow chart of a real-time pressure sampling under stressed conditions according to the method of the present invention; and
fig. 4 is a flow chart of real-time pressure detection under normal injection conditions according to the method of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Fig. 1 is a flow chart of a method according to the invention.
As shown in fig. 1, the method comprises the steps of:
s102, under the condition that the injector is filled with liquid and the infusion pipeline is opened, carrying out pressure sampling and obtaining a zero voltage value RP corresponding to a sampled pressure value;
s104, connecting the water outlet end of the infusion pipeline to a pressure gauge, sampling a plurality of different pressures which change linearly in the infusion pipeline, and obtaining a first voltage value P (1) to an ith voltage value P (i) corresponding to the plurality of different pressures; and
s106, calculating a step voltage value delta P from the zero voltage value RP, the first voltage value P (1) to the ith voltage value P (i) according to a preset algorithm.
Wherein, S102 further comprises: putting the injector filled with liquid into an injection pump, and connecting an open infusion pipeline; under the calibration state, a motor of the injection pump starts to operate and pushes a piston in the injector to move; and sampling the pressure in the infusion pipeline under the condition that the infusion pipeline is opened, and storing a stable pressure value, wherein the voltage value corresponding to the stable pressure value is a zero voltage value RP.
S104 further comprises: putting the injector filled with liquid into an injection pump, and connecting the infusion pipeline with a pressure gauge after exhausting air in the infusion pipeline; the motor of the injection pump starts to operate in a calibration state to push the piston in the injector to move; and sampling a plurality of different pressures which linearly change in the infusion pipeline, and obtaining a first voltage value P (1) to an ith voltage value P (i) corresponding to the plurality of different pressures.
According to the method of the invention, the predetermined algorithm is:
ΔP(1)＝P(1)-PR；
ΔP(i)＝P(i)-P(i-1)；
ΔP＝(ΔP(1)+ΔP(2)+......+ΔP(N))/N
wherein,
n, N being an integer greater than or equal to 2; and P (1) to P
(i) Is a voltage sampling value with equal pressure intervals which are linearly changed.
In addition, the method further comprises: in the normal injection process, the pressure in the infusion pipeline is detected in real time and correspondingly controlled according to the step voltage value delta P and the threshold voltage value TP corresponding to the set pressure threshold value.
Wherein, in the normal injection process, the method further comprises the following steps: reading the step voltage value delta P from the memory; setting a pressure threshold value, and setting a threshold voltage value TP according to the step voltage value delta P and the pressure threshold value; during normal injection, the motor of the injection pump starts to operate to push the piston in the injector to move; sampling the pressure in the infusion pipeline, and obtaining a working voltage value RealP corresponding to the sampled pressure; and comparing the difference between the working voltage value RealP and the zero voltage value RP with the threshold voltage value TP, and performing alarm processing when the difference is greater than the threshold voltage value TP.
The invention will be elucidated by means of a preferred embodiment shown in the drawings.
Fig. 2 is a flow chart of real-time pressure sampling when a pipeline is opened according to the method of the present invention.
Fig. 3 is a flow chart of a real-time pressure sampling under a pressurized condition according to the method of the present invention.
Fig. 4 is a flow chart of real-time pressure detection under normal injection conditions according to the method of the present invention.
The basic idea of the invention is to establish a real-time pressure value RP of the zero pressure in a state where the motor is running and the pipe is open, and to determine Δ P by a value between several points having a linear relationship.
The preliminary preparation work performed was: filling the syringe with liquid; the injector is connected with the infusion pipeline, a pressure gauge and an injection pump.
As shown in fig. 2, fig. 3, and fig. 4, the steps and method of the present embodiment are:
sampling a real-time pressure RP value, after the injector is placed at the correct position of the pump, starting to operate the motor, starting to sample the RP value, determining the RP value after the RP value is stable, and stopping operating the motor (the RP value is obtained by monitoring a pressure sensor);
sampling real-time pressure, determining delta P, connecting an outlet end of an infusion pipeline with a pressure gauge, starting to operate a motor, enabling liquid in the infusion pipeline to flow into the pressure gauge, adopting pressure values with several linear relations, such as 30Kpa, 60Kpa and 90Kpa, sequentially obtaining P1, P2 and P3 according to the pressure real-time sampling values, calculating delta P1-P1-RP, delta P2-P2-P1, delta P3-P3-P2, and calculating delta P (delta P1+ delta P2+ delta P3)/3); and
during normal injection, the pressure of a patient is monitored in real time and is controlled correspondingly, during injection, the purpose of monitoring the pressure in real time is to prevent the pipeline pressure from being too high, so that a danger is caused to the patient, a pressure threshold value is set for a pump before use, if the set pressure is exceeded, the pump prompts an alarm, and finally the injection is stopped, so that the current real-time pressure value is compared with the set pressure threshold value, if the pressure threshold value is set to be 30Kpa, a digital quantity corresponding to 30Kpa is compared with delta P, if the pressure threshold value is larger than delta P, the digital quantity is processed, otherwise, the digital quantity is not processed, and similarly, 60Kpa is compared with delta P2; 90Kpa, compared to Δ P × 3.
The pressure at the moment can be accurately judged whether to exceed the set value or not by the calculation method.
In summary, the method of the present invention is provided to solve the problem of inaccurate pressure detection, and the method can be applied to medical equipment including a syringe pump that affects a patient pressure system, so as to improve the pressure detection precision, thereby ensuring the accuracy and safety of the equipment during the infusion process.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method of pressure sensing for a syringe pump, the method comprising the steps of:
the method comprises the following steps that firstly, under the condition that an injector is filled with liquid and a transfusion pipeline is opened, pressure sampling is carried out, and a zero voltage value RP corresponding to a sampled pressure value is obtained;
connecting the water outlet end of the infusion pipeline to a pressure gauge, sampling a plurality of different pressures which change linearly in the infusion pipeline, and obtaining first voltage values P (1) to ith voltage values P (i) corresponding to the different pressures; and
step three, calculating a step voltage value delta P from the zero voltage value RP, the first voltage value P (1) to the ith voltage value P (i) according to a preset algorithm,
wherein, the first step further comprises:
putting the injector filled with liquid into an injection pump, and connecting an open infusion pipeline;
under the calibration state, the motor of the injection pump starts to operate and pushes the piston in the injector to move; and
sampling the pressure in the infusion pipeline under the condition that the infusion pipeline is opened, and storing a stable pressure value, wherein the voltage value corresponding to the stable pressure value is the zero voltage value RP,
the second step further comprises:
putting the injector filled with liquid into the injection pump, and connecting the infusion pipeline with the pressure gauge after exhausting air in the infusion pipeline;
the motor of the injection pump starts to operate in the calibration state to push the piston in the injector to move; and
sampling the different pressures linearly changing in the infusion pipeline, and obtaining the first voltage value P (1) to the ith voltage value P (i) corresponding to the different pressures,
the predetermined algorithm is:
ΔP(1)＝P(1)-RP；
ΔP(i)＝P(i)-P(i-1)；
ΔP＝(ΔP(1)+ΔP(2)+......+ΔP(N))/N
wherein,
n, N being an integer greater than or equal to 2; and
p (1) to P (i) are voltage sampling values of the linearly varying equal pressure interval.
2. The method of claim 1, further comprising:
and step four, detecting the pressure in the infusion pipeline in real time in the normal injection process, and correspondingly controlling according to the step voltage value delta P and the threshold voltage value TP corresponding to the set pressure threshold value.
3. The method of claim 2, wherein the fourth step further comprises:
reading the step voltage value delta P from a memory;
setting the pressure threshold value, and setting the threshold voltage value TP according to the step voltage value delta P and the pressure threshold value;
during the normal injection process, the motor of the injection pump starts to operate to push the piston in the injector to move;
sampling the pressure in the infusion pipeline, and obtaining a working voltage value RealP corresponding to the sampled pressure; and
and comparing the difference between the working voltage value RealP and the zero voltage value RP with the threshold voltage value TP, and performing alarm processing when the difference is greater than the threshold voltage value TP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810117718 CN101644617B (en) | 2008-08-04 | 2008-08-04 | Pressure detection method for injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810117718 CN101644617B (en) | 2008-08-04 | 2008-08-04 | Pressure detection method for injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101644617A CN101644617A (en) | 2010-02-10 |
| CN101644617B true CN101644617B (en) | 2012-10-10 |
Family
ID=41656597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810117718 Expired - Fee Related CN101644617B (en) | 2008-08-04 | 2008-08-04 | Pressure detection method for injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101644617B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735392B (en) * | 2012-06-28 | 2014-12-24 | 费森尤斯卡比健源（长沙）医疗科技有限公司 | Method for detecting obstruction pressure of infusion pump |
| CN104258485B (en) * | 2014-10-17 | 2016-08-24 | 中国计量科学研究院 | Infusion pump/infusion pump detector integrated correction device |
| CN113589395A (en) * | 2021-07-15 | 2021-11-02 | 桂林优利特医疗电子有限公司 | Multichannel pipeline reagent alarm detection method and device in blood analyzer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10303443B3 (en) * | 2003-01-29 | 2004-10-21 | Siemens Ag | Testing method for common-rail fuel injection system for automobile IC engine with measurement of pressure in common-rail pressure reservoir after starting and disconnection of high pressure pump |
| CN101113929A (en) * | 2007-06-29 | 2008-01-30 | 五邑大学 | Method and device for detecting injection pressure of all-electric injection molding machine |
-
2008
- 2008-08-04 CN CN 200810117718 patent/CN101644617B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10303443B3 (en) * | 2003-01-29 | 2004-10-21 | Siemens Ag | Testing method for common-rail fuel injection system for automobile IC engine with measurement of pressure in common-rail pressure reservoir after starting and disconnection of high pressure pump |
| CN101113929A (en) * | 2007-06-29 | 2008-01-30 | 五邑大学 | Method and device for detecting injection pressure of all-electric injection molding machine |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平6-109714A 1994.04.22 |
| JP特表2007-512527A 2007.05.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101644617A (en) | 2010-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7353692B2 (en) | Leakage tester | |
| JP5991971B2 (en) | Infusion pump with tube measurement technique using linear actuator and pressure sensor | |
| CN1522163A (en) | Occlusion detection method and system for ambulatory drug infusion pump | |
| US9989551B2 (en) | Real-time volume confirmation dispensing apparatus and methods | |
| CA2723978A1 (en) | A medical fluid circuit comprising a low level detector 1 | |
| CN101644617B (en) | Pressure detection method for injection pump | |
| US10480549B2 (en) | Cylinder operating condition monitoring device | |
| CN102961801A (en) | Infusion pipeline blockage alarm value setting device and method | |
| US5263367A (en) | Method and apparatus for determining delivery amounts and rates of pumps in the medicotechnical field | |
| CN107949781A (en) | Helium leakage detector | |
| CN111257125A (en) | System and method for testing isostatic pressure strength and volume modulus | |
| EP1319417A1 (en) | Method and apparatus for monitoring a fluid conduit system of a medical instrument | |
| JP2011075480A (en) | Inspection method of vacuum pump, and vacuum pressure measuring device | |
| CN210266734U (en) | Gas pipeline leakage monitoring device capable of adjusting monitoring distance | |
| CN208751962U (en) | Mobile gas cylinder internal test method water pressure test detection device | |
| CN114160224B (en) | Micro sample injector and sample injection method | |
| CN108627306A (en) | The device and method for detecting gas circuit air-tightness | |
| CA2527122A1 (en) | Apparatus and method for pumping a fluid from a storage vessel and detecting when the storage vessel is empty | |
| CN203148637U (en) | Device detecting leakage, blockage and damaged filtering membrane of transfusion system | |
| WO2006132571A1 (en) | Pressure measurements in automatic taking of specimens | |
| JP2009008620A (en) | Leakage inspection device of underground tank | |
| US11040147B2 (en) | Injector position sensing | |
| CN106092464A (en) | Leak detector measurement method | |
| CN220912555U (en) | Pressure sensor detection system | |
| CN220437689U (en) | Sealing performance detection device for sealing ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 |