Intraoperative Autotriggered Pressure Support Ventilation Resistant to Increased Flow Trigger Threshold

Julio Benitez Lopez, Sripad P. Rao, Richard R. McNeer, Roman Dudaryk

Research output: Contribution to journalArticle


Oscillations from cardiac pulsations are normally transmitted to mediastinal structures without any consequence. Autotriggering (AT) of mechanical ventilation occurs when an inspiratory trigger, typically negative inspiratory flow in anesthesia ventilators, is met in the absence of patient effort. AT can lead to respiratory alkalosis, opioid overdose, prolonged mechanical ventilation, and lung hyperinflation. This entity has been reported in both critical care and operating room environments. Increasing the flow trigger usually resolves AT in all cases. We report a case of AT that failed to respond to increasing the flow trigger threshold to its maximal value on the GE Datex-Ohmeda Avance S5® anesthesia station.

Original languageEnglish (US)
Pages (from-to)9-12
Number of pages4
JournalA & A case reports
Issue number1
StatePublished - Jul 1 2016


ASJC Scopus subject areas

  • Medicine(all)

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