This study was designed to determine the value of Color Doppler Ultrasound with twinkling sign in the initial diagnosis of acute renal colic. Color doppler ultrasound only missed 4 cases out of 939 patients (99.6%.) This topic is not only essential to Emergency medicine but also urology and internal medicine.
The methods are valid, but it would be difficult to reproduce the results in the point-of-care setup where unilateral hydronephrosis is the main finding. In addition, this study does no