Mastorakou I, Lindsell D R, Piepoli M, Adamopoulos S, Ledingham J G
Department of Radiology, John Radcliffe Hospital, Oxford, UK.
Abdom Imaging. 1994 Jul-Aug;19(4):369-73. doi: 10.1007/BF00198202.
In order to establish the normal range of values of Pulsatility (PI) and Resistance (RI) Indices in the intrarenal vasculature, a study of 50 healthy volunteers (23 males, 27 females), divided into five groups of 10 according to age, was performed with Duplex Doppler ultrasound. Both kidneys were examined in all individuals and, in 12, indices were also compared between upper and lower poles of both kidneys. In addition, repeat examinations were performed in nine subjects on three different days, in order to assess the reproducibility of the method. No differences were found in the mean values of both indices between males and females, upper and lower poles, right and left kidneys. A statistically significant increase (p < 0.01, unpaired t-test) was demonstrated when the oldest age group (7th decade) was compared to the youngest age group (3rd decade). The method appeared remarkably reproducible for RI (4.2-7%), with wider variation in the PI (9.5-22.7%).
为了确定肾内血管系统搏动指数（PI）和阻力指数（RI）的正常取值范围，我们使用双功多普勒超声对50名健康志愿者（23名男性，27名女性）进行了研究，根据年龄将他们分成五组，每组10人。对所有个体的双肾进行了检查，其中12人还对双肾的上下极之间的指数进行了比较。此外，为了评估该方法的可重复性，对9名受试者在三个不同的日期进行了重复检查。在男性和女性之间、上下极之间、左右肾之间，两个指数的平均值均未发现差异。当将年龄最大的年龄组（七旬）与最年轻的年龄组（三旬）进行比较时，显示出有统计学意义的增加（p < 0.01，非配对t检验）。该方法对RI而言具有显著的可重复性（4.2 - 7%），而PI的变化范围更大（9.5 - 22.7%）。
