脑出血体积计算.ppt

脑出血体积计算,上海市第一人民医院神经内科基地培训,Hematoma Volume Measurement,上海市第一人民医院神经内科基地培训,椭球体积 (a、b、c分别代表各轴的一半),上海市第一人民医院神经内科基地培训,血肿体积 (a、b、c分别代表长、宽、厚mm ÷1000=ml),NEUROSURGERY 2006脑外伤手术指南,上海市第一人民医院神经内科基地培训,3种HV计算方法： 1、头颅CT成像后，资料导入电脑，计算每一层面积后，叠加面积得出体积，此为体积金标准，但很少用到。 2、将血肿模拟为椭球体，体积公式为V=(A*B*C)/2 说明如下： A:最大血肿面积层面血肿的最长径 B:最大血肿面积层面上与最长径垂直的最长径 C:若层厚为1cm，则厚度计算为各层面系数的叠加。 血肿面积75%,系数计为1 3、“Cavalieri direct estimator”方法：由电脑计算完成。,上海市第一人民医院神经内科基地培训,上海市第一人民医院神经内科基地培训,上海市第一人民医院神经内科基地培训,RESULTS: Fifty-six subjects were analyzed (mean age 62±15 years; 45% women). On-site HV values showed a significantly lower correlation with the MIPAV HV (r=0.63) than central HV and MIPAV HV (r=0.93) values. The correlation between on-site HV and central HV values was modest (r=0.51). A total of 73% of the central HVs were within 25% of the corresponding MIPAV HVs, whereas only 46% of the on-site HVs were within 25% of the corresponding MIPAV HVs (P0.001). One protocol violation occurred as a result of inaccuracy of on-site HV measurement. CONCLUSIONS: On-site HV measurements showed high variability, but the impact on the eligibility determination was small. Centralized remeasurements of HVs with feedback to the sites may increase the reliability of the on-site HV measurements.,上海市第一人民医院神经内科基地培训,谢谢！,