A hospital attack that left a nurse seriously injured has fuelled calls for improved safety and security after several violent incidents in emergency departments. Police restrained a 51-year-old patient after he allegedly assaulted several nurses, police and a member of the public in a Saturday night melee at Sydney’s Prince of Wales hospital. The man seriously injured a nurse’s leg before assaulting two others and a security guard, police were told. During the same incident, the man allegedly assaulted a 26-year-old woman, who was trying to protect a nearby patient, with a garbage bin. He is also accused of assaulting an officer who attempted to speak to him, before police shot him with a Taser and placed him under arrest. He was then moved to a secure facility within the hospital. The injured nurse was admitted to the hospital for further treatment while the officer, hospital staff and a member of the public were treated at the scene, but did not require further medical care.…