Saba Akram, Farhana Riyaz, Muhammad Aqeel Natt.
Accuracy of Intra Renal Arterial Doppler Duplex Ultrasonography in Obstructive Uropathy by Comparing IVU.
Pak J Med Health Sci Jan ;12(3):929-30.

Aim: To determine accuracy of intrarenal arterial Doppler duplex ultrasonography in obstructive uropathy by comparing with IVU. Methods: This cross sectional study was conducted on 79 patients from July 2012 to December 2012 of both genders with age ranging from 20 to 70 years and in whom pain alone or pain with oliguria, haematuria, urgency and frequency are the major complaints at Department of Radiology, Shaikh Zayed Hospital Lahore Then colour flow Doppler to detect the presence or absence of urinary obstruction. A RI of >0.70 was considered as suggestive of obstruction. All patients were prepared two days prior to IVU by administering laxatives. Xray KUB was per formed initially to know about the preparation, exposure and any radio-opaque density if present taken after by infusing Sodium ditrizoate intravenously in a measurement of 1ml/kg body weight. Results: There were 68.4% male and 31.6% female patients with mean age was 44.7+/-12.4 years. The sensitivity of Doppler Duplex ultrasonography by taking IVU finding as gold standard was 85%, specificity 69% and diagnostic accuracy was 81%. The positive predictive value of Doppler Duplex ultrasonography by taking IVU finding as gold standard was 87% and negative predictive value was 65%. Conclusion: Use of duplex Doppler sonography improved the specificity, and thus the accuracy, of sonography in the diagnosis of obstruction uropathy.

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