I'm going along with RichMSN, although due to possible emotions involved with regard to the seriousness of the injury, I probably won't start time until I ask the coach if he's ready to proceed.
Zebra44 and I worked a game, a few weeks ago, with three blood stoppages. One stoppage took about 20 minutes to clean up cuz th player [a tooth thing] went to the bench but kept bleeding. Then the floor and bench area had to be cleaned....
Lucky for us, the player was elbowed by a teammate.