Why the study?
Does pulse oximetry accurately measure oxygen saturation compared to co-oximetry in patients with septic shock and low systemic vascular resistance?
Population
Patients with septic shock receiving intensive therapy with indwelling pulmonary artery flotation catheters
Comparison
Pulse oximetry vs Co-oximetry
Design
Cross-sectional
Authors
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Caution advised interpreting pulse oximetry in low-SVR septic shock; leaves open need for prospective co-oximetry validation.
Does pulse oximetry accurately measure oxygen saturation compared to co-oximetry in patients with septic shock and low systemic vascular resistance?
Pulse oximetry slightly but significantly underestimates oxygen saturation in patients with septic shock and low systemic vascular resistance, likely due to sensing pulsatile venous flow.
Secker et al. (1997) studied this question.
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