Laboratorní úloha pro měření termodiluce v předmětu Snímače a senzory.

Abstract

A research review of invasive and non-invasive cardiac output measurement methods was conducted, with a focus on indicator-based techniques. Based on this review, a laboratory task was developed using the thermodilution method for cardiac output measurement, applying a Swan-Ganz catheter connected via a Wheatstone bridge to an ESP32 microcontroller. The thermodilution curves were evaluated in real time on the ESP32 for the purposes of the task. The catheter thermistor values were presented to the user in two ways – on an OLED display and on a web server hosted at the ESP32 module’s IP address, which also ensured data recording, including the thermodilution curve. The functionality and accuracy of the assembled measurement device were verified using a test setup with a pulsatile pump. The obtained cardiac output values were compared with measurements from the pulsatile pump and Vernier temperature probes. The exercise meets the scope of the assignment. The result is a functional laboratory task for the course Sensors and Transducers in Biomedicine, which can be incorporated into laboratory tuition.