What is the appropriate response when measured NO is above the set concentration during inhaled nitric oxide therapy?

In the context of inhaled nitric oxide therapy, if the measured nitric oxide (NO) concentration exceeds the set concentration, placing a one-way valve between the injector module and the humidifier is an appropriate response. This action helps to prevent backflow of gas, which can lead to an inaccurate measurement of nitric oxide levels and may contribute to elevated concentrations.

The introduction of a one-way valve ensures that the gas flows in a single direction, thereby maintaining the integrity of the delivery system and helping to stabilize the measured NO concentration within the desired therapeutic range. This response is crucial in managing patient safety and ensuring effective therapy.

Other options may not appropriately address the problem of elevated nitric oxide levels. Adjusting the frequency or flow on the ventilator might not directly impact the measurement inaccuracies caused by backflow or configuration issues, while turning the power off and on does not provide a systematic solution to the elevated levels, potentially prolonging the issue instead of rectifying it.