Adaptive control system for a medical ventilator

Details Adaptive control system for a medical ventilator Adaptive control system for a medical ventilator

A - Human Necessities

61

M

A61M 16/00 (2006.01) A61M 16/20 (2006.01)

Patent

CA 2199100

A control system for a single-valve controlled medical ventilator adaptively invokes separate flow delivery or flow exhaust control functions in response to the sensed dynamic state of the ventilator without any dependence on measured patient parameters. The control system selects either the flow delivery control system or flow exhaust control system based on a determination of the mode in which the ventilator is operating. The determination is made using a sensed ventilator operational parameter, such as the ratio of manifold pressure to flow output, to select the appropriate control function. A hysteresis routine is provided to prevent "hair triggering" between the flow delivery and flow exhaust control systems.

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