Check out this website:

http://www.utahmountainbiking.com/firstaid/index.htm

Lot of useful information.

Exerpt:

"After cleaning the wound, antibiotic ointment is applied. Be sure the patient isn't allergic to the antibiotic. The non-stick pad is placed next, then a gauze pad to cushion and protect. A kling wrap keeps the gauze in place."

Frankie