ISSN No. 2079-8547 (Recognized by PMDC)
DIAGNOSTIC ACCURACY OF RENAL ARTERIAL RESISTIVE INDEX (RI) IN ACUTE RENAL COLIC
Abstract
Objective: To determine accuracy of resistive index in the detection of renal calculi confirmed by intravenous urography.
Methods: This study was conducted at Department of Diagnostic Radiology, Khyber teaching Hospital Peshawar. This
was a cross sectional (validation) study which was conducted for a period of 6 months. All patients were subjected
to Doppler ultrasound to detect renal calculi on the basis of resistive index of more than +0.70. After that intravenous
urography (IVU) was done in all patients to confirm the presence or absence of renal calculi.
Results: The mean age was 30 years with SD ±1.26. 65% patients were male and 35% patients were female. In intravenous
urography, renal calculi were detected in 92% patients. While using renal resistive index, renal calculi were
detected in 87% patients.
Conclusion: Doppler Ultrasound is a sensitive and highly specific test that can contribute significantly to the diagnosis
and management of acute unilateral renal obstruction, particularly in situations in which IVU is undesirable.
Key Words: Resistive index, Renal calculi, Intravenous urography