[Pharmacological modifications of radiation methods for studying the kidneys in determining the nature of the stenosis of the pelviureteral segment in patients with nephrolithiasis. Its outpatient diagnosis].

As many as 17 nephrolithiasis and 6 hydronephrosis patients with surgically verified irreversible (n = 13) and reversible (n = 10) stenosis of the pelviureteral segment were examined. To distinguish the character of the stenosis, use was made of excretory urography and dynamic scintigraphy with progesterone, ultrasound, and dynamic scintigraphy with furosemide. In nephrolithiasis patients, dynamic scintigraphy is less informative as compared to other modifications. As compared to hydronephrosis patients, all the modifications indicated are less informative in nephrolithiasis patients in differentiating the character of the stenosis.