“…2). Nine trials used regional anaesthesia alone [7-9, 30, 33, 35, 36, 39, 40], one trial also used general anaesthesia [42], nine trials sedated with propofol [6,11,23,26,28,29,32,34,37] and six sedated with midazolam and an opioid [10,22,27,31,38,41].…”