例句與造句

1. If a urethral injury is suspected, a retrograde urethrogram should be performed before attempting to place a Foley catheter into the bladder.
2. Specifically, when a retrograde urethrogram demonstrates extension of contrast from the proximal bulbous urethra into the perineum, there is an increase of grading of the injury from a Type 2 to a Type 3 classification.
3. It's difficult to find retrograde urethrogram in a sentence. 用retrograde urethrogram造句挺難的