Anaes Vivas · Anaesthetic ventilators
Data viva — the airway-pressure and capnography traces
A data viva on the pressure-volume and capnography waveforms — identifying the peak, the plateau, the PEEP and the driving pressure; separating the resistance from the compliance causes of a high peak.
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ANZCAFRCAABAEDAIC
Prompt
Two traces from a ventilated patient. Trace A is the airway pressure against time (a rising limb to a peak, a plateau, then a fall to a PEEP baseline). Trace B is the capnograph (a baseline zero, a rapid upstroke, an alveolar plateau, and a downstroke to baseline). A second pressure trace shows a high peak with a normal plateau.
Stimulus
A ventilated patient's monitor shows the airway pressure against time and the capnograph. On the pressure trace, identify the peak, the plateau, the PEEP, and the driving pressure. A second trace shows a peak of 34 cmH2O with a plateau of 16 cmH2O and a PEEP of 5. Interpret the difference between a high peak with a normal plateau and a high peak with a high plateau.
References1ShowHide
- [1]Jackson K, et al. Review of Anesthesia Versus Intensive Care Unit Ventilators and Ventilatory Strategies: COVID-19 Patient Management Implications. AANA Journal, 2021.PMID 33501910