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Canadian Journal of Anesthesia, Vol 10, 491-500, Copyright © 1963 by Canadian Anesthesiologists' Society

The Adequacy of the Radford Nomogram during Anaesthesia

E. A. GAIN M.D.1

1 The Department of Anaesthesia, University of Alberta Hospital, Edmonton, Alberta

The Radford nomogram and the Wright ventilation meter have been often recommended as a useful, reliable method of providing satisfactory ventilation during anaesthesia, with certain reservations. Previous studies have been reviewed. The use of the nomogram and meter under usual clinical conditions has been carried out and the adequacy of ventilation has been determined by measurement of arterial carbon dioxide tension. It was found that the muchmaligned "educated hand" was a more reliable means of maintaining arterial carbon dioxide tensions at safe levels than was the nomogram under these conditions. It is believed that in extrathoracic cases increasing the nomogram value by at least 25 per cent, and with an open pleura by 100 per cent, the nomogram will provide safe levels of arterial carbon dioxide during anaesthesia with controlled or artificial respiration.






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Copyright © 1963 by the Canadian Anesthesiologists' Society.