Adjusting the %MinVol in ASV mode
What are the recommendations for the initial %MinVol settings in Adaptive Support Ventilation (ASV®)?
A logical starting point is setting a %MinVol value that will result in the same minute volume as a previous mode, if applicable.
- For example, the %MinVol could be set as follows:
- Normal patient: 100%
- Chronic hypercapnia patient: 100%
- ARDS patient: 120%
Add 20% if the body temperature exceeds 38.5°C (101.3°F) and 5% per 500 m (1640 ft) above sea level.
If dead space is altered by an artificial airway configuration, such as the use of a heat and moisture exchanging filter (HMEF) or nonstandard tubing, modify the Patient height setting accordingly to take into account the added or removed dead space.
|Normal arterial bloodgas||None||--|
|High PaCO2||Increase %MinVol||Pay attention to inspiratory pressures|
|Low PaCO2||Decrease %MinVol||Pay attention to mean airway pressure and oxygenation status|
|High respiratory drive||Consider increasing %MinVol||Consider sedation, analgesia or other treatments|
|Low Oxygen saturation||None||Consider increasing PEEP and/or Oxygen|
For more information on adjustment of %MinVol in ASV mode, see your Hamilton Medical ventilator’s Operator’s Manual.
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