CN110812598A - Capacitance type infusion allowance calculation and alarm method with temperature self-calibration function - Google Patents
Capacitance type infusion allowance calculation and alarm method with temperature self-calibration function Download PDFInfo
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- CN110812598A CN110812598A CN201911140635.0A CN201911140635A CN110812598A CN 110812598 A CN110812598 A CN 110812598A CN 201911140635 A CN201911140635 A CN 201911140635A CN 110812598 A CN110812598 A CN 110812598A
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- infusion
- capacitance
- capacitance value
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- 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
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
Abstract
The invention discloses a capacitance type infusion allowance calculating and alarming method with a temperature self-calibration function, which comprises the following steps: in a constant temperature environment with a set temperature, the processor detects a reference capacitance value of an infusion tube or an infusion bag during quantitative infusion and a capacitance value after liquid infusion is finished; in an actual use environment, the processor firstly detects the maximum capacitance value when the infusion amount is maximum, then detects the reference capacitance value when quantitative infusion is performed, and then calculates the corresponding maximum capacitance value in a set temperature environment; after the infusion apparatus is used for a period of time, the processor detects a real-time capacitance value during actual infusion and converts the real-time capacitance value into a corresponding real-time capacitance value in a set temperature environment; the processor compares the real-time capacitance value with the capacitance value after the liquid is completely infused, and then alarms or calculates the residual liquid ratio. The real-time capacitance value of the infusion tube or the infusion bag under different temperature environments can be accurately detected, the temperature self-calibration function is realized, the alarm can be accurately given, and the real-time residual liquid volume proportion in the infusion tube or the infusion bag can be calculated.
Description
Technical Field
The invention relates to an infusion alarm method, in particular to a capacitance type infusion allowance calculation and alarm method with a temperature self-calibration function.
Background
Infusion is a common means for disease treatment, and usually needs to monitor whether the liquid in the infusion tube is completely infused in the process of infusion, but the work is mainly completed manually at present, and the work is not suitable for being completed due to physical fatigue of patients and the like, so that medical staff or family members of the patients need to closely monitor, the workload of the medical staff or the family members of the patients is increased, and the patients can make mistakes by careless manual work, thereby causing serious influence on the physical health of the patients.
In order to solve the disadvantages of manual monitoring, some transfusion alarms are available in the existing market for automatically sending out alarm signals when transfusion is about to be completed, but all the alarms have the defects that:
1. infusion alarm based on photoelectric sensor: the alarm is most used and mature at present, but the light reflection principle is needed, so that the alarm is not good for transparent liquid detection, and the specific residual liquid amount cannot be measured.
2. Infusion alarm based on heat dissipation principle: the infusion tube is locally heated for a certain time, the time required for measuring the temperature of the part to be reduced to the specified temperature is shortened, the shorter the temperature reduction time is, the more the liquid allowance is, the more the liquid amount can be effectively and quantitatively measured, but the precision is limited, the measurement of the amount of the liquid which is remained after the end is very inaccurate, and in addition, the heating consumes energy and generally utilizes electric energy, so the infusion tube cannot be used for portable equipment.
3. Infusion alarm based on electric capacity detects: the capacitance of the infusion tube is detected to judge whether the liquid exists or not, the method has less energy consumption and simple hardware circuit, and therefore, the method can be effectively made into precise and highly integrated portable equipment; however, the conventional capacitive infusion alarm has the following problems:
(1) because the capacitance changes in a nonlinear rule along with the temperature change at different temperatures and changes greatly, each infusion alarm device needs to independently set an alarm baseline value, and the baseline alarm value needs to be updated after the temperature changes, so that general workers cannot operate the infusion alarm device, the operation is troublesome and inaccurate, and the practicability of the infusion alarm device is poor;
(2) the existing integrated capacitor detection chip and the single chip microcomputer are generally adopted for processing, and the circuit is relatively complex, large in size and high in power consumption.
(3) Only can judge whether liquid exists or not, cannot know the specific residual liquid amount, and is not beneficial to managers to know the transfusion condition in real time.
For example, the invention patent application with the application number of '201910445600.1' discloses a capacitive infusion alarm and a control method, which are applied to the technical field of medical equipment, the alarm comprises a shell provided with a preset space for accommodating an infusion tube, and a resistor, a capacitor, a power supply and a controller which are arranged in the shell, wherein the power supply is connected with a first capacitor plate of the capacitor through the resistor, a second capacitor plate of the capacitor is grounded, an insulating dielectric medium of the capacitor comprises the infusion tube, a designated pin of the controller is connected with a common end of the resistor and the first capacitor plate, after the controller obtains a starting instruction, controlling the capacitor to repeatedly carry out charging/discharging processes, acquiring the charging time required by each time of voltage rising from zero value to a preset voltage threshold, and sending an alarm signal and stopping the charge/discharge control of the capacitor after the obtained charging time is less than a preset time threshold. The invention can remind the patient or the accompanying person when the liquid medicine is completely infused; however, the problem of probable false alarm caused by temperature cannot be automatically eliminated, so that the precision is different when the device is used in different temperature environments, the residual liquid amount cannot be detected, and the device is not beneficial to intelligent management.
Disclosure of Invention
The invention aims to solve the problems and provide a capacitance type infusion residual quantity calculating and alarming method with a temperature self-calibration function.
The invention realizes the purpose through the following technical scheme:
a capacitance type transfusion allowance calculation and alarm method with a temperature self-calibration function is realized by a capacitance type transfusion alarm device in the prior art, the capacitance type transfusion alarm device comprises a capacitance detection device, a processor and an alarm device, and the capacitance type transfusion allowance calculation and alarm method with the temperature self-calibration function comprises the following steps:
step 1, in a constant temperature environment with a set temperature, a processor detects a reference capacitance value C0 of an infusion tube or an infusion bag during quantitative infusion and a capacitance value CL of the infusion tube or the infusion bag after liquid infusion is finished through a capacitance detection device, and stores the capacitance values;
step 2, in an actual use environment, the processor firstly detects the infusion tube or the infusion tube with the maximum infusion amount through the capacitance detection deviceMaximum capacitance C of infusion bagmax' then, a reference capacitance value C1 of the infusion tube or the infusion bag during quantitative infusion is detected by a capacitance detection device, and then C is detectedmax' conversion to the corresponding maximum capacitance C in the set temperature environmentmax，Cmax＝Cmax’×C0/C1；
Step 3, after the infusion bag is used for a period of time t, the processor detects the real-time capacitance value C of the infusion tube or the infusion bag in the actual infusion process through the capacitance detection devicex', then Cx' conversion to corresponding real-time capacitance C in set temperature environmentx，Cx＝Cx’×C0/C1；
Step 4, processor comparison CxIf the residual liquid quantity is less than CL, an alarm device alarms, and if not, the residual liquid quantity proportion N, N-C in the infusion tube or the infusion bag at the moment is calculatedx/CmaxX is 100%; and when N is close to 0, reducing the detection interval time, namely reducing the value of t, and repeating the step 3 and the step 4.
Preferably, the set temperature is 25 ℃ in order to achieve a constant temperature effect.
Preferably, t in the step 3 is 3 to 5 seconds, and t after the reduction in the step 4 is 0.5 seconds, for the purpose of both accurate monitoring and power consumption reduction.
The invention has the beneficial effects that:
the capacitance values of the infusion tube or the infusion bag corresponding to the set temperature in different actual use temperature environments are obtained through the processor in a comparison calculation mode, which is equivalent to re-determining the baseline value, so that the purpose of accurately detecting the real-time capacitance values in different temperature environments is achieved, the temperature self-calibration function is realized, the real-time residual liquid amount proportion in the infusion tube or the infusion bag can be calculated while accurate alarm is realized, the detection frequency is accelerated when the proportion is close to 0, accurate monitoring is further realized, and the energy consumption is reduced; through the communication device, the processor can transmit the residual liquid amount proportion information monitored in real time to the manager in real time, and the modern management of full automation and intellectualization is facilitated.
Detailed Description
The invention is further illustrated by the following examples:
example (b):
a capacitance type transfusion allowance calculation and alarm method with a temperature self-calibration function is realized by a capacitance type transfusion alarm device in the prior art, the capacitance type transfusion alarm device comprises a capacitance detection device, a processor and an alarm device, and the capacitance type transfusion allowance calculation and alarm method with the temperature self-calibration function comprises the following steps:
step 1, in a constant temperature environment of 25 ℃, a processor detects a reference capacitance value C0 of an infusion tube or an infusion bag during quantitative infusion and a capacitance value CL of the infusion tube or the infusion bag after liquid infusion is finished through a capacitance detection device and stores the capacitance values; the steps are generally finished before the product leaves a factory, and the following steps are finished in actual use;
step 2, in an actual use environment, the processor firstly detects the maximum capacitance value C of the infusion tube or the infusion bag when the infusion amount is maximum through the capacitance detection devicemax' then, a reference capacitance value C1 of the infusion tube or the infusion bag during quantitative infusion is detected by a capacitance detection device, and then C is detectedmax' conversion to the corresponding maximum capacitance C in the set temperature environmentmax，Cmax＝Cmax'. times.C 0/C1; in the detection process, because the detection process is in microsecond level and can detect tens of thousands of times per second, sufficient time is provided for filtering the detection signal so as to improve the precision, and the detection signal can be specifically used by matching one or more of arithmetic mean filtering, weighted mean filtering, sliding mean filtering, median filtering, anti-pulse interference mean filtering, amplitude limiting filtering, Kalman filtering and first-order lag filtering;
step 3, after the infusion bag is used for a period of time t, the t is 3-5 seconds, and the processor detects the real-time capacitance value C of the infusion tube or the infusion bag during actual infusion through the capacitance detection devicex', then Cx' conversion to corresponding real-time capacitance C in set temperature environmentx，Cx＝Cx’×C0/C1；
Step 4, processor comparison CxIf the residual liquid quantity is less than CL, an alarm device alarms, and if not, the residual liquid quantity proportion N, N-C in the infusion tube or the infusion bag at the moment is calculatedx/CmaxX is 100%; and when N is close to 0, reducing the detection interval time, namely reducing the t value to 0.5 second, and repeating the step 3 and the step 4.
Description of the drawings: the hardware required by the invention can be realized by adopting a capacitance type transfusion alarm device in the prior art, the method is mainly realized by installing software in a processor, and meanwhile, the method is completed by matching with conventional hardware such as a capacitance detection device, an alarm device and the like; for example, the infusion alarm disclosed in the invention patent application with the application number of '201910445600.1', the controller of the infusion alarm is the processor of the infusion alarm, a single chip microcomputer is preferably adopted, and the capacitance detection device and the alarm device of the infusion alarm can be known in the public documents. The invention patent application No. 201610002279.6, also discloses an automatic alarm for infusion tubes, and also describes a device for detecting the capacitance of an infusion tube.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Claims (3)
1. A capacitance type infusion allowance calculation and alarm method with a temperature self-calibration function is realized by a capacitance type infusion alarm device in the prior art, the capacitance type infusion alarm device comprises a capacitance detection device, a processor and an alarm device, and is characterized in that: the capacitance type infusion allowance calculating and alarming method with the temperature self-calibration function comprises the following steps:
step 1, in a constant temperature environment with a set temperature, a processor detects a reference capacitance value C0 of an infusion tube or an infusion bag during quantitative infusion and a capacitance value CL of the infusion tube or the infusion bag after liquid infusion is finished through a capacitance detection device, and stores the capacitance values;
step 2, in an actual use environment, the processor firstly detects the infusion tube when the infusion amount is maximum through the capacitance detection deviceOr maximum capacitance value C of the infusion bagmax' then, a reference capacitance value C1 of the infusion tube or the infusion bag during quantitative infusion is detected by a capacitance detection device, and then C is detectedmax' conversion to the corresponding maximum capacitance C in the set temperature environmentmax，Cmax＝Cmax’×C0/C1；
Step 3, after the infusion bag is used for a period of time t, the processor detects the real-time capacitance value C of the infusion tube or the infusion bag in the actual infusion process through the capacitance detection devicex', then Cx' conversion to corresponding real-time capacitance C in set temperature environmentx，Cx＝Cx’×C0/C1；
Step 4, processor comparison CxIf the residual liquid quantity is less than CL, an alarm device alarms, and if not, the residual liquid quantity proportion N, N-C in the infusion tube or the infusion bag at the moment is calculatedx/CmaxX is 100%; and when N is close to 0, reducing the detection interval time, namely reducing the value of t, and repeating the step 3 and the step 4.
2. The capacitance type infusion residual quantity calculating and alarming method with the temperature self-calibration function according to claim 1, characterized in that: the set temperature was 25 ℃.
3. The capacitance type infusion residual quantity calculating and alarming method with the temperature self-calibration function according to claim 1 or 2, characterized in that: and t in the step 3 is 3-5 seconds, and t after the reduction in the step 4 is 0.5 seconds.
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| CN201911140635.0A CN110812598A (en) | 2019-11-20 | 2019-11-20 | Capacitance type infusion allowance calculation and alarm method with temperature self-calibration function |
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| CN201911140635.0A CN110812598A (en) | 2019-11-20 | 2019-11-20 | Capacitance type infusion allowance calculation and alarm method with temperature self-calibration function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115837105A (en) * | 2023-02-27 | 2023-03-24 | 华序科技开发(深圳)有限公司 | Infusion prompting method and system for intelligent ward |
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Application publication date: 20200221 |