CLINICAL-ASSESSMENT OF OXYGEN DELIVERY AND CONSUMPTION DURING HYPOTENSIVE ANESTHESIA - A CLINICAL-APPLICATION OF THE DEEP-PICTURE(TM)

Usual evaluation of the relationship between oxygen delivery (DO2) and oxygen uptake (VO2) is based on the arterial oxygen tension (pO(2)), oxygen saturation (sO(2)), haemoglobin concentration (ctHb), the same indicators in mixed venous blood and cardiac output, sometimes supplem ented by the expiratory carbon dioxide concentration. And, so far, the relationship among DO2, VO2 and the new parameters for an evaluation of oxygen status (oxygen extraction tension: p(x), concentration of ex tractable oxygen: c(x), oxygen compensation factor: Q(x)) (1) has not been discussed enough. Therefore, this study was designed to evaluate whether the new parameters give the clinically significant information to analyse the relationship between DO2 and VO2 during the acute haem odynamic change with intentionally induced hypotension in anaesthetize d adult patients.