Wouldn't it will be simpler to have replaceable faceplate with different connectors (a cradle) in each room? Basically, idea is similar to having power buttons/plug/ethernet connector on the wall. Instead you have horizontally mounted faceplate in a cabinet, bed headrest, or any horizontal surface with appropriate connector where device can sit and be charged. There are not too many USB charging devices that will be used in a mental hospital by patients. And depending on the type of device swap out the faceplate with appropriate one.
The best way to avoid ligature and self harm risk is to not have any cable or sharp objects around. Also, this solution will avoid the privacy risk when patient device is taken away for charging by staff members.
The best way to avoid ligature and self harm risk is to not have any cable or sharp objects around. Also, this solution will avoid the privacy risk when patient device is taken away for charging by staff members.