How to do sajdah if one has a recent head and nose injury, and most of the forehead is bandaged?

If its possible for him to keep his/her forehead on the ground or on whatever things h/she is using for sajdah it would be considered h/her Sajdah. Otherwise if it's not feasible for him/her to put forehead on the ground can take mohr in hand and touch it on the forehead.