usefulness of inter-renal resistive index difference in diagnosing acute unilateral ureteric obstruction due to calculus

To evaluate the usefulness of inter-renal resistive index difference in diagnosis of acute unilateral ureteric obstruction due to calculus. Case Control Study was conducted in Department of Radiology, Combined Military Hospital Lahore, from August 2005 to February 2006. Sixty patients were divided in two groups of 30 each group I, 30 patients with unilateral acute ureteric colic due to ureteric calculus; and group II, 30 patients having no symptoms and with a normal ultrasound [as controls]. Interlobar arteries were examined by Colour Doppler ultrasound in upper, mid and lower renal pole with a two to five millimetre sample volume to calculate average resistive index. Inter-renal resistive index difference [deltaRI] was then calculated. Statistically significant difference was observed in the inter-renal resistive index difference [deltaRI] measurements with mean value in the case group of 0.09 compared to 0.021 in controls. Average intrarenal resistive index measurement in the obstructed kidney was .69 compared to 0.58-0.59 in the control group. Measurement of inter-renal resistive index difference in patients with ureteric colic improves diagnostic accuracy of ultrasound in distinguishing between obstructive and non-obstructive dilatation

Doppler indices in fetoplacental and uteroplacental circulation at 22 weeks of gestation

Doppler has revolutionized the field of obstetrics since its introduction in late 1950's. Useful information is obtained during second half of pregnancy and pregnancies with high resistance can be determined. A total number of 100 patients were studied in Combined Military Hospital, Rawalpindi from 01 June 2002 to 25 January 2003. Normal pregnant women with 20 weeks of gestation, from all socioeconomic strata and singleton pregnancy were included in the study. Doppler examination was performed and the range of normal indices determined from all the four vessels. Descriptive statistical analysis of data was carried out. For umbilical artery mean PI was 1.48 [range = 0.92-1.91] RI was 0.78 [range = 0.64-0.84] S/D ratio was 4.68 [range = 3.84-5.6] For uterine artery mean PI was 1.18 [range = 0.69-1.86] RI was 0.54 [range = 0.44-0.66] and S/D ratio was 2.18 [range = 1.92-2.36] for fetal aorta mean PI was 1.94 [range = 1.54-2.42] RI was 0.80 [range = 0.68-0.88] S/D ratio was 6.22 [range = 3.18-6.94]. For MCH PI was 1.86 [range = 1.44-2.30] RI was 0.84 [range = 0.72-0.88] S/D ratio was 5.64 [range = 3.22-7.1]. The determined range of Doppler indices in our study varies as compared to international data. This variation equipment used difference in time of gestation and site of vessel under study