Medical Necessity: Evaluate for hydronephrosis

Structures studied: Kidneys, including collecting system

Focused Question: Is hydronephrosis present? 

Guidelines

Scan bilaterally

1.) Obtain video clip fanning through entire portions of both kidneys in both the longitudinal and transverse planes.

Left

Right

2.) Obtain one static representative image.

Static longitudinal image of kidney without hydronephrosis

 

If hydronephrosis is present (particularly bilaterally), scan the urinary bladder. If the bladder is distended, have the patient empty the bladder and repeat scan after 15 minutes.  

If there is any confusion as to the origin of fluid filled structures seen in the renal pelvis, apply color flow to differentiate vascular spaces from urinary spaces.


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