What Researchers Did
Researchers compared initial blood lactate levels and lactate clearance as predictors of HBOT requirement in 169 emergency department patients with carbon monoxide poisoning.
What They Found
Initial lactate above 2.8 mmol/L predicted HBOT need with 64% sensitivity and 73% specificity. Lactate clearance was not significantly associated with treatment group, suggesting initial lactate is a more useful triage marker than lactate change over time.
What This Means for Canadian Patients
Canadian emergency physicians managing CO poisoning cases -- particularly in winter -- can use initial blood lactate as a straightforward triage tool to identify patients requiring urgent HBOT referral.
Canadian Relevance
Covers an OHIP-covered indication: carbon monoxide poisoning. Ontario emergency departments can apply these lactate threshold findings to improve triage decisions for HBOT eligibility.
Study Limitations
The retrospective single-centre design and moderate discriminative accuracy limit adoption of this threshold without further validation.