The Phasitron® breathing circuit
The patented Phasitron® uses a unique sliding venturi mechanism to protect the lung from overpressure. By automatically adjusting to the resistance of the lung, the Phasitron® precisely and safely delivers the optimal amount and pressure of air required by the alveolar space. When lung resistance is low, as in a compliant lung, all the pulsed air from the device enters the mouth of the venturi tube inside the Phasitron and is delivered instantly to the patient. If needed, each pulse of the Phasitron is capable of entraining up to four times as much additional air into the venturi, which is delivered directly to the patient.