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A new method for studying the ventilatory response in patients
Author(s) -
Johnson A.,
Löfström J. B.
Publication year - 1990
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1990.tb03119.x
Subject(s) - medicine , tidal volume , ventilation (architecture) , respiration , respiratory minute volume , carbon dioxide , anesthesia , respiratory system , perfusion , volume (thermodynamics) , breathing , cardiology , engineering , mechanical engineering , ecology , physics , quantum mechanics , biology , anatomy
A method for clinical studies of the ventilatory response to carbon dioxide and to hypoxaemia in patients is described. The main parameters with this method are respiratory frequency, tidal volume, minute volume, timing, and drive. The ventilation of volunteers was not affected while breathing air through the designed apparatus. The response to carbon dioxide and to hypoxaemia in volunteers was reproducible and similar to what has previously been described. Our method proved suitable to test the ventilatory responses in patients with varying degrees of impaired ventilation‐perfusion ratios and thus also in patients with a low Pao 2 . Our method has a higher accuracy than earlier methods.