Adjusting the %MinVol in ASV mode

Author: Clinical Experts Group, Hamilton Medical, Reviewer: N/A

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.

ASV clinical workflow


Condition %MinVol change Remarks
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.

ASV, MinVol, PaCO2, PetCO2, blood gas, acid base, adjustment, spontaneous, breathing rate, active, passive

Date of Printing: 12.08.2020
The content of this Knowledge Base is intended for informational purposes only. Hamilton Medical AG provides no warranty with respect to the information contained in this Knowledge Base and reliance on any part of this information is solely at your own risk. For detailed instructions on operating your Hamilton Medical device, please refer to the official Hamilton Medical Operator’s Manual for the respective device.