Patent ID: 7481222

Claim:
A device for ventilation of a patient, the device comprising a ventilator having an outlet for providing a stream of gas for ventilation and an inlet for receiving a stream of expired gas, a double-lumen endotracheal tube having an end distal to the patient and a tracheal end that engages the patient's trachea, wherein, at the end distal to the patient, a lumen for inspiratory gas is connected to the ventilator outlet and a separate lumen for expiratory gas is connected to the ventilator inlet such that, during ventilation, a stream of gas is only flowing through one lumen at a time, a flow meter located at the end of the double-lumen endotracheal tube distal to the patient and connected to the inspiratory lumen and a separate flow meter located at the end of the double-lumen endotracheal tube distal to the patient and connected to the expiratory lumen, and a pressometer located at the end of the double-lumen endotracheal tube distal to the patient and connected to the inspiratory lumen and a separate pressometer located at the end of the double-lumen endotracheal tube distal to the patient and connected to the expiratory lumen, the pressometers being adapted for alternating between measuring the pressure directly at the end distal to the patient of the double-lumen endotracheal tube and the pressure at the tracheal end of the double-lumen endotracheal tube depending upon which lumen through which gas is flowing.