The QRS Nose-Clip (#724050-00), in line with ATS guidelines, is recommended when performing a spirometry test with a QRS spirometer.
Warranty: 1 Year - Free from Defects in Material and Workmanship.
ATS guidelines state "The use of a nose clip or manual occlusion of the nares is recommended, [...]." One acceptability criterion for spirometry is that the test be free from artifacts, including leaks, which can be prevented by using a nose clip.
