Being the manner which decides the oxygen conveyance tonnage, non invasive measurement step of the artery blood pressure ripple mark and heart beat from pulsating wave analysis of this blood pressure ripple mark Out it includes with the non invasive measurement step of decisive step and oxygen saturation of the tonnage and hemoglobin concentration and the real time calculation step of the oxygen conveyance tonnage which is based on the tonnage where these were measured, manner.酸素運搬量を決定する方法であって、動脈血圧波形の非侵襲的測定ステップと、この血圧波形の脈波分析からの心拍出量の決定ステップと、酸素飽和度及びヘモグロビン濃度の非侵襲的測定ステップと、これらの測定された量に基づく酸素運搬量のリアルタイム計算ステップとを含む、方法。