The present invention is drawn to a system to be used for measuring NO levels in exhaled breathing air. The system comprises: (i) a face mask that tightly covers the nose and/or mouth of the individual that the mask is intended to be used on; (ii) an inlet unit for inhaled breathing air, (iii) an outlet...http://www.google.com.tw/patents/US5922610?utm_source=gb-gplus-share專利 US5922610 - System to be used for the determination of no levels in exhaled air and diagnostic methods for disorders related to abnormal no levels
