CPAP with air and oxygen to non-ventilated lung improves oxygenation during one lung anaesthesia.
Ten adult patients undergoing one lung ventilation for elective thoracotomy were selected. All these patients failed to maintain oxygen saturation (SaO2) > 90% despite administration of 100% oxygen to the non-ventilated lung (NVL). These patients were studied for the efficacy of continuous positive airway pressure (CPAP) of the NVL using air and oxygen combination (FiO20.5) employing a variable FiO2CPAP system. It was observed that application of CPAP (5-10 cm H2O) with a mixture of air and oxygen to the NVL increased the SaO2 > 90% in all these patients. This could be attributed to nitrogen in air which prevented absorption atelectasis in the NVL. This produced a better ventilation/perfusion ratio and hence the increased oxygen saturation.
Maroof
M
M
Department of Anaesthesiology, King Fahad National Guard Hospital, Riyadh, Saudi Arabia.
Khan
R M
RM
Bhatti
T H
TH
D000328:Adult; D000769:Anesthesia, Inhalation; D006801:Humans; D008168:Lung / Q000187:drug effects / Q000378:metabolism; D008875:Middle Aged; D010100:Oxygen / Q000008:administration & dosage; D010101:Oxygen Consumption; D011013:Pneumonectomy / Q000379:methods*; D011175:Positive-Pressure Respiration; D013997:Time Factors
D010100:Oxygen