A POCKET CALCULATOR PROGRAM FOR NON-INVASIVE BEDSIDE ASSESSMENT OF CARDIORESPIRATORY FUNCTION

A pocket calculator program has been written for the rapid bedside evaluation of cardiorespiratory function. The unique features of this program are that it makes use of recently available noninvasive techniques for measurement of arterial oxygen saturation and mixed venous P//C//O//2. This enables calculation of pulmonary venous admixture and mixed venous oxyen saturation without need for central venous or pulmonary artery catheterization. If the ventilation and respired gas concentrations are also measured, cardiac output and alveolar ventilation can be expressed in liters per minute, and the dead space: tidal volume ratio calculated. The program for a TI 59 programmable pocket calculator is given.