Respiratory equations – behind the numbers

Keywords: equations, respiratory physiology, ventilation, perfusion, dead space


Candidates for the FCA 1 exam will come across dozens of equations that eventually all merge into something complicated and daunting. The purpose of this review is to highlight some of the respiratory equations that are important and that candidates find confusing and explain the mathematical and physiological principles behind them.

Author Biography

T G A Leonard, University of the Witwatersrand

Department of Anaesthesia, School of Clinical Medicine, Faculty of Health Sciences, Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand, South Africa

FCA 1 Anaesthetic Refresher Course 2020