A Clinical Study of Inhaled Nitric Oxide in Moderate-to-Severe Chronic Obstructive Pulmonary Disease

The Nitric Oxide Generation and Delivery System is used to deliver nitric oxide for inhalation therapy into the inspiratory limb of the patient breathing circuit in a way that provides a constant concentration of nitric oxide (NO), as set by the user, to the patient throughout the inspired breath.

use air（21%O2）as the placebo of inhaled treatment