The incident occurred in wee hours, when Ismail Shaikh (30), admitted in male ward, consumed liquor and started ransacking furniture and telephones without any provocation.
He abused nurses on duty and later inflicted injuries on himself using a broken piece of glass.
No police personnel was present at the police beat inside the hospital when the frightened staff approached for help, sources at hospital said.
The nurses banned work in protest after the incident, but withdrew their agitation on assurance of Civil Surgeon.