| 摘要 |
A nitric oxide delivery system for providing a predetermined concentration of nitric oxide to a patient, the system comprising a supply (10) of nitric oxide having a known concentration, a gas delivery system (30) for providing a breathing gas for delivery to a patient, the nitric oxide delivery system comprising a patient adapter (28) receiving the breathing gas from the gas delivery system (30) and connecting to a patient (42), the patient adapter (28) having a passageway therethrough, a flow transducer (46) within the patient adapter (28) for passageway sensing the flow of breathing gas delivered by the gas delivery system (30) and generating a signal indicative of such flow, control means (52) for generating a signal indicative of the predetermined concentration of nitric oxide to be delivered to the patient (42) from the patient adapter (28), a flow control valve (24) controlling the flow of nitric oxide from the supply of nitric oxide (10), conduit means receiving the flow of the nitric oxide from the flow control valve (24) and introducing the flow into the patient adapter (28), the flow of nitric oxide mixing within the patient adapter (28) at a point downstream in the passageway from the flow transducer (46), and a signal processor (56) responsive to the signal from the flow transducer (46) representative of the sensed flow and to the signal from the control means (52) to calculate and provide a signal to the flow control valve (24) to establish a flow through the flow control valve (24) to the patient adapter (28) in an amount sufficient to establish a nitric oxide concentration delivered from the patient adapter (28) to the patient (42) in the predetermined amount. <IMAGE> |
