Related Experiment Video
Updated: Jun 20, 2026

Conducting Respiratory Oscillometry in an Outpatient Setting
Published on: April 8, 2022
Determination of mode of ventilation using OSRE
D Faulke1, T A Etchells, M J Harrison
1Department of Anaesthesia and Perioperative Medicine, Auckland City Hospital, Auckland, New Zealand. DanF@adhb.govt.nz
Abstract:
This study classifies the mode of ventilation using respiratory rate, inhaled and exhaled carbon dioxide concentrations in anaesthetised patients. Thirty seven patients were breathing spontaneously (SPONT) and 50 were on a ventilator (intermittent positive pressure ventilation, IPPV). A data-based methodology for rule inference from trained neural networks, orthogonal search-based rule extraction, identified two sets of low-order Boolean rules for differential identification of the mode of ventilation. Combining both models produced three possible outcomes; IPPV, SPONT and 'Uncertain'. The true positive rates were approximately maintained at 96% for IPPV and 93% for SPONT, with false positive rates of 0.4% for each category and 4.3% 'Uncertain' inferences.
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