| abstract |
A device (10) and method of ventilating a patient reduces the bias flow relative to existing oscillatory ventilators. The device has a gas flow circuit including an oscillating line (14), a patient line (25), and an exhalation (30) or a return line (67). A gas supply line (8) and an outlet valve (52) are in pneumatic communication with the gas flow circuit. One or more CO scrubbers (38, 68) and one or more check valves (20, 42) are provided in the circuit. |