What Researchers Did
Researchers conducted a prospective, observational study with 10 acute carbon monoxide poisoning patients to evaluate a pulse CO-oximeter's ability to continuously monitor carboxyhemoglobin during hyperbaric oxygen therapy.
What They Found
The pulse CO-oximeter overestimated carboxyhemoglobin by 2.9% [±1.0%] with limits of agreement of ±7.3% [±1.8%], exceeding the a priori target of ±6%. Continuous measurements showed fluctuating levels, sometimes above 100%, though unaffected by pressure changes.
What This Means for Canadian Patients
Canadian patients undergoing hyperbaric oxygen therapy for carbon monoxide poisoning might benefit from non-invasive monitoring, but the observed overestimation and wide agreement limits suggest this device may not provide sufficiently precise readings for critical clinical decisions. Clinicians should be aware of these accuracy limitations when considering its use for real-time carboxyhemoglobin assessment.
Canadian Relevance
This study has no direct Canadian connection.
Study Limitations
A key limitation is the pulse CO-oximeter's overestimation of carboxyhemoglobin and the wide limits of agreement, which may affect its clinical reliability.