cálmese Mucama Nacional collins water seal spirometer Temblar presión progresivo
American Association for Respiratory Care - AARC - Using a water seal spirometer to perform spirometry on a pediatric outpatient. Take notice of the unique "noseclip." #ThrowbackThursday http://museum.aarc.org/ Image from Marvin Lough
Spirometer, Collins Survey, 1981 | PFT History
Stead-Wells | PFT History
Pulmonary Function Testing Equipment | Clinical Gate