1. Ventilatory ratio: a simple bedside measure of ventilation
P. Sinha, N.J. Fauvel, S. Singh, N. Soni 
British Journal of Anaesthesia 
Volume 102, Issue 5, Pages (May 2009)
DOI: /bja/aep054
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Relationship of PaCO2 to minute ventilation for given values of VR.
British Journal of Anaesthesia  , DOI: ( /bja/aep054)
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Comparison of VR values between perioperative and ICU patients. Horizontal bars represent median values and IQRs.
British Journal of Anaesthesia  , DOI: ( /bja/aep054)
Copyright © 2009 British Journal of Anaesthesia Terms and Conditions