Patients with structural or functional abnormalities such as obstruction, chronic catheter, spinal cord injury etc.
High fever, septic, vomiting, upper tract symptoms
Non-obstructed, mild, less than 60 years of age, no nausea, vomiting, no evidence of dehydration, sepsis or high grade fever
Over 60 years of age, nausea, vomiting, evidence of dehydration, sepsis or high grade fever