Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1980-03-20
1982-07-20
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820515, 12820511, 12820525, A61M 1600
Patent
active
043400442
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 prescribed minute volume of the oxygen mixture to be delivered to a patient. The adjustment control circuitry which performs the calculations, logic and drive operations for switching and mixing oxygen in plural chambers (14, 18, 29, 30) of module (2), the switching of the mixture 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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patent: 4176663 (1979-12-01), Hewlett
Levy Donald
Rusz Tibor
Berkshire Research Partners
Padden Frederick W.
Recla Henry J.
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