Medical ventilator triggering and cycling method and mechanism

Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure

Reexamination Certificate

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C128S204180

Reexamination Certificate

active

07000612

ABSTRACT:
A medical ventilator system and method that triggers, cycles, or both based on patient effort, which is determined from cross-correlating patient flow and patient pressure. The medical ventilator is also controlled such that sensitivity to a patient initiated trigger increases as the expiratory phase of the breathing cycle progresses. The present invention also provides adaptive adjustment of cycling criteria to optimize the cycling operation.

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