The amount of hematuria that reliably corresponds to significant genitourinary trauma is:
A positive urine dipstick test for blood.
+A spun “urinocrit” greater than 2%.
+More than 50 RBCs per high-power field.
+Gross hematuria.
+None of the above.
Gross hematuria following blunt trauma is an indication for immediate radiologic evaluation of the genitourinary tract. However, the degree of hematuria cannot be used as an index of the severity of injury. Dipstick urine testing may be falsely positive secondary to myoglobinuria.