Volume ventilator

Details Volume ventilator Volume ventilator

A - Human Necessities

61

M

137/1.5

A61M 16/00 (2006.01)

Patent

CA 1172935

VOLUME VENTILATOR Abstract A medical ventilator is disclosed for switching and mixing oxygen with air in a driving and oxygen mixing means (2) and delivering the mixture to a gas flow control apparatus (3) for application directly to a patient breathing apparatus (5) or to storage in a bellows reservoir (81) of a continuous positive airway pressure facility (4). The ventilator is equipped with a control module (1) having directly set control adjustments (6 - 9, 105 - 112) for determining respiratory rate, inspiration- to-expiration ratio, oxygen concentration and the pre- scribed minute volume of the oxygen mixture to be delivered to a patient. The adjustment control circuitry which performs the calculations, logic and drive opera- tions for switching and mixing oxygen in plural chambers (14, 18, 29, 30) of module (2), the switching of the mix- ture through module (3), and sensing fill and refill needs of reservoir (81). Module (4) includes apparatus (83, 84) for exerting a positive pressure on the oxygen in reservoir (81).

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