Medical air system is widely used in hospitals. Parameters such as terminal pressure, terminal pressure drop, terminal flow, water content, and particle concentration can directly decide the quality of medical air system. At present, there is no relevant calibration specification,or method for medical air system in China. This article presents a novel calibration method for medical air system by determining corresponding environmental conditions, calibration standards, location of standards and calculation equations. The calibration results show that the calibration method is scientific and practical for metrological performance evaluation of medical air system.
Infant phototherapy incubator is widely used in medical institutions to reduce the concentration of bilirubin in the body of infant while maintaining the body temperature of the infant. This article presents a novel design of calibration procedure to measure the instruments’ metrological parameters such as "error of total irradiance for bilirubin after pre-ageing", "relative local distribution of total irradiance for bilirubin after pre-ageing", "uniformity of incubator temperature", "accuracy of skin temperature sensor", "relative humidity indication error" and "accuracy of oxygen sensor" in order to ensure the accuracy and reliability of infant phototherapy incubator. The experimental results show that the calibration procedure presented in this article can ensure the metrological traceability of infant phototherapy incubators in daily use.
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