Conditional Imaging Prescription Strategy for Exploration of Acute Uncomplicated Renal Colic
Conditional Imaging Prescription Strategy for Exploration of Acute Uncomplicated Renal Colic
Prospective single centre study aiming at validating a conditional imaging strategy for
 diagnosis of suspected kidney stone.

 Consecutive Emergency department patients referred to the medical imaging department for
 exploration of a suspected acute uncomplicated renal colic will undergo the following
 interventions : systematic plain abdominal Xray, systematic ultrasonography and systematic
 unenhanced CT (with a reduced dose scan), in addition to clinical examination and assessment
 of body mass index and the Sex, Timing, Origin, Nausea, Erythrocytes (STONE) clinical
 prediction score for symptomatic stone.

 Patients will be followed up at 1 month to record the need for urologic intervention and its
 type.

 The performances of different conditional imaging strategy for the diagnosis of suspected
 renal colic will be assessed retrospectively. The conditional strategies tested will be based
 on the patient's stone score and BMI and targeted use of combined plain X-ray and
 ultrasonography and/or unenhanced CT.

 The reference diagnosis for renal colic will be made according to the finding of a ureteral
 stone or indirect signs of urolithiasis at unenhanced CT.
Plain abdominal Xray, Ultrasonography and unenhanced CT of the abdomen and pelvis will be
 performed at the time of admission to the imaging department, within 2 days from ED visit and
 within a 1 hour delay from each other.

 Ultrasonography will be interpretated in combination to plain abdominal Xray, and
 independently from unenhanced CT, by two experienced radiologists blinded to the results of
 each other.
Inclusion criteria:

 -  Adult patient

 -  Patient admitted to the Emergency department with suspected acute uncomplicated renal
 colic

 Exclusion criteria:

 -  Patient presenting with fever (>38°C)

 -  Patient with persisting pain despite administration of morphinic

 -  Patient presenting with anuria

 -  Patients with a single kidney and/or history of chronic renal failure

 -  Pregnant women or breastfeeding women

 -  Patient with a history of renal colic

 -  Patients unable to provide informed consent