Objective To evaluate noninvasive measurement of cardiac output (NICO) by the partial CO_2 rebreathing method (CO_(NICO)), which was compared with that by bolus cardiac output (BCO) monitoring (according to modified Fick formula).

• 目的 根据部分CO_2重复呼吸法和经修改后Fick方程原理,对无创监测心输出量(CO)的临床和技术性能作评估。