[Changes in oxygen uptake and carbon dioxide elimination during induced hypotension in humans]

Changes in oxygen uptake and carbon dioxide elimination during induced hypotension were examined in eight anesthetized patients undergoing radical mastectomy. 1) The induced hypotension to 75% of control values had no obvious effect on oxygen uptake and carbon dioxide elimination. 2) The results suggest that it is important to avoid the decrease in oxygen transport by low blood perfusion and to avoid the increase in oxygen debt during induced hypotension. 3) Non-invasive metabolic monitoring of gas phase will be more necessary in future to monitor the anesthetic depth and to manage the nutrition.