1. Pulse oximetry tracings from a 60-y-old woman with a COPD exacerbation who was admitted to the ICU in ventilatory failure.
Pulse oximetry tracings from a 60-y-old woman with a COPD exacerbation who was admitted to the ICU in ventilatory failure. A: The patient's pulse oximetry tracing at the time of admission, revealing the respiratory variability in the pulse oximeter plethysmogram. Her measured pulsus paradoxus at this time was 16 mm Hg. B: The patient's pulse oximetry plethysmogram after 12 h of aggressive therapy. Her pulsus paradoxus at this time was 8 mm Hg. Note the absence of respiratory waveform variation (RWV) in the baseline of the oximeter tracing after the clinical improvement in airflow and the resolution of elevated pulsus paradoxus. From Reference 30, with permission.
Dean R Hess Respir Care 2016;61:
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