| 摘要 |
The inhaled nitric oxide system (10) includes a respiratory circuit (12) for delivering gases to a patient (14), a source (16) of gas containing NO, an NO monitoring and delivery subsystem (18) and a gas scavenger (20). The NO monitori ng subsystem (18) includes electrochemical cells located on a side stream flow line for monitoring NO delivery. In one embodiment, the monitoring subsystem includes, in serial sequence on the side stream flow line, an NO2 cell, an NO cell and an O2 cell. The cells are housed in sealed chambers upstream from a flow pump, and thus oper ate at subambient pressures. The system (10) provides accurate and continuous monito ring of inhaled nitric oxide administration using electrochemical cell technology, an d provides fast response time with reduced cross-cell interference.
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