Avaliação do desempenho metrológico de incubadoras neonatais em hospital público de grande porte e alta complexidade utilizando sistema de coleta automatizado

Abstract

This work aim to develop a national technology system, for the automated verification of the performance of neonatal incubators, with wireless transmission, to collect temperature and humidity data. The system was evaluated by performing tests in four neonatal incubators from the same manufacturer and two different models when submitted to different control temperatures (32 °C and 36 °C), based on the requirements of ABNT NBR IEC 60601-2-19 standard. The proposed system acquires the data through a microcontroller and sends the data to the computer via Bluetooth. The system consists of four modules: sensors, acquisition, communication and software. The prototype developed measures, inside the incubator, the air temperature in five different points and the relative humidity of the air in a single point, through five HTU21D sensors. The metrological parameters measurement error, repeatability, measurement uncertainty and maximum error were evaluated for all neonatal incubators. The proposed system for monitoring and acquiring air temperature and relative humidity data in neonatal incubators has proved to be an innovative, portable, inexpensive and easy to use solution. The measurement error in most of the incubators was negative, indicating that the neonatal incubator was always smaller than the selected value. The expanded uncertainty was similar at all incubator temperatures representing 1% of the mean. . It was found that the all analyzed incubators presented parameter overshoot values outside the range established by NBR IEC 60601-2-19 standard.