Which should I make my son use?

My 14 year old son recently had surgery (don't want to go into detail) & is recovering @ home. Problem is he's bed bound and can't use the bathroom on his own. The hospital suggested a catheter or diapers. He's unwilling to stick the catheter up his thing and embarrassed about me putting a diaper on him like a baby. But unless he wants to wet himself he has no choice until he recovers. Catheter or diaper?