ABSTRACT
In order to solve the problems of quality control and traceability of medical test lung for meeting the calibration conditions of JJF 1234-2018 Calibration Specification for Ventilators, the calibration device and method are researched for compliance and airway resistance of medical test lung in this paper. A calibration device for medical test lung is designed using constant volume active piston technology to simulate human breathing. Through comparison experiment, the deviation between this device and the similar foreign device can be found. The deviation is lower than 0.4% for lung compliance and lower than 0.7% for airway resistance. The calibration of lung compliance and airway resistance can be completed by this device. This device has a clear and complete traceability path to ensure quality control from the source. The calibration of ventilator is improved. This paper provides a reference for related metrology departments and medical institutions to study on quality inspection of respiratory medical instruments.
Subject(s)
Humans , Calibration , Ventilators, Mechanical , Respiration , Quality Control , LungABSTRACT
Objective To determine the relationship between the theory and actual displacement of the urine flow rate meter calibration device gear pump, and to construct a model between actual and theory displacement, in order to obtain actual displacement via theory displacement. Methods The weight of the standard water flow in each flow rate was measured by B2000S digital scales,and the scatter plot between the theory displacement and actual displacement was drawn to find the best fitted curve;then the MATLAB Curve Fitting Tool was used to obtain the best quasi relational equation. Results The error between the fitted displacement and the actual displacement of the gear bump was 1.494% in maximum and-0.010% in minimum, far less than 5% of the requirements for urinary flow meter measurement. Conclusion Based on regression analysis, the relationship between the theoretical displacement and actual displacement of the flow rate meter calibration device is established,the fitting error is small,and the method is simple and easy to achieve.
ABSTRACT
Objective:The platelet thermostatic storage box is widely used in hospital, laboratory, and blood station. It is very necessary to develop a calibration device to ensure the accuracy of the technical parameters.Methods: Using Infrared emitter, digital temperature sensor, ARM microcontroller etc to form a calibration device, the parameters of temperature, amplitude and frequency are processed. Data is transferred by Bluetooth communication, final; the test report is printed out for clinical.Results: The calibration device is developed, it can detect the important performance parameters of preservation box, it can ensure the safety of patient's blood transfusion. Conclusion: This calibration device is simple operation, strong practicability, stable performance; it can detect the technical parameters of platelet thermostatic storage box through experiment to ensure the safety and quality.