临床上对小肠缺血及活力的估计常常主观与不准确,至今仍无一得到广泛认可和应用的方法,可在术中测定小肠血流量从而评估小肠的活力。作者以狗为实验模型,采用表面氧张力测量仪及脉氧仪对小肠组织血流的情况进行了测定分析。根据光电原理,通过计算动脉中去氧和氧合血红蛋白对红光及红外线两种不同光波吸收强弱的不同比例,算出不饱和及饱和血红蛋白比例,同时,通过检测动脉收缩及舒张时光波吸收的最大及最小值的比值,计算“脉搏增加”的光波吸收值,以去除静脉及组织对光波吸收的影响,从而得出一正确的动脉血氧饱 Clinical estimates of intestinal ischemia and vitality are often subjective and inaccurate, so far there is no widely recognized and applied methods, can be determined intraoperative blood flow in the small intestine to assess the vitality of the small intestine. The author of the dog as the experimental model, the use of surface oxygen tension meter and pulse oxygen meter blood flow in the small intestine were measured and analyzed. According to the principle of optoelectronics, the proportion of unsaturated and saturated hemoglobin can be calculated by calculating the different proportion of deoxygenation and oxyhemoglobin in artery on the absorption of two different light waves of red light and infrared light. At the same time, by detecting the absorption of light wave in arterial contraction and diastole Maximum and minimum ratio, calculate the “pulse increase” of the light absorption value to remove the vein and tissue on the light absorption, resulting in a correct arterial oxygen saturation