Make sure he does not get constipated,a hard motion going past a newly stitched urethra is not advisable. Some hospitals apparently issue laxatives. Pain killers are renowned for causing constipation.
Some instilagel gel in case the Catheter makes the end of the penis sore.
Spare leg and bag straps for the Catheter so they can be changed after showering.
Hope all goes well.
Thanks Chris