Adjusting the %MinVol in ASV mode

Author: Aleh Satsishur, Simon Franz, Reviewer: Ralph Teuber, Matthias Näf, Thomas Sperling, Kaouther Saihi, Bernhard Schmitt

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: 27.11.2021
The content of this Knowledge Base is intended for use by Hamilton Medical distribution partners for informational purposes only, and should not be copied, distributed or published in any way. While the information contained herein is believed to be accurate, it does not represent an official recommendation from Hamilton Medical AG, nor may it substitute an opinion, assessment or instructions provided by a trained healthcare professional.
Date of Printing: 27.11.2021
The content of this Knowledge Base is intended for informational purposes only. Medin 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 Medin Medical device, please refer to the official Medin Medical Operator’s Manual for the respective device.