Auteur: Simon Franz
Last change: 02.10.2020(Originally published: 19.02.18) SW updated
Incorrect positioning of the CO2 mainstream sensor may affect the quality of the signal. When using INTELLiVENT®-ASV®, an unreliable signal may in turn affect the automated adjustments, as these are dependent on the quality index of the signal from the sensor.
If a PetCO2 signal is unavailable or of poor quality for more than 30 seconds, the Ventilation adjustment OFF alarm will be generated. The %MinVol control becomes a solid red circle that is frozen and automatic adjustment of the %MinVol stops. In this case, a constant minute ventilation equal to the last valid automatic %MinVol setting will be applied.
The poor quality of the signal is indicated by gray, red and orange bars on the display (see Figure 1). Once a reliable PetCO2 signal is available again, the %MinVol control becomes a blue rotating circle and the bars turn green. The alarm is reset and automated ventilation management resumes.
Therefore, correct placement and positioning of the sensor is very important.
Place the sensor/airway adapter assembly at the proximal end of the airway circuit as shown in Figure 2.
Relevant devices with INTELLiVENT-ASV (