title: Portable emergency ventilators. 2. Sensitivity to environment.
abstract: Three compact ventilators (Oxylog, Maxaman and Pneupac 2), commercially available in Sweden, were subjected to tests concerning sensitivity to environmental stress. The ventilators functioned very well at temperatures above 0 degree C. The Oxylog apparatus was very sensitive to subzero temperatures. It also had a spectrum of resonance frequencies when subjected to vibration testing that restricts its use outside the sheltered hospital environment. The Maxaman and Pneupac 2 in the modified version withstood the tests in a reliable way. The shock tests performed had no negative effects on any of the ventilators or their functions.
mesh_terms: D004630:Emergencies; D004777:Environment; D005069:Evaluation Studies as Topic; D006813:Humidity; D013696:Temperature; D012122:Ventilators, Mechanical / Q000592:standards*; D014732:Vibration