CO poisoning remains a serious public health problem. Oxygen remains the principal treatment and HBO has proven to be more effective in preventing cognitive sequelae than NBO in patients at high risk for PNM. These include: comatose patient; history of loss of consciousness; neurophychometric disturbances; cardiac dysfunction and pregnancy. Such patients justify HBO therapy. However, other patients should be treated by an appropriate NBO regimen: 100% oxygen for at least 12 hours. A recent survey in our region showed that 50 % of CO poisoning patients requiring NBO did not receive this 32. This may result in severe morbidity and socio economic costs.

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