“…Postoperative pain relief was the third most common primary outcome of interest (n=13, 15% of included studies), 22,24,31,34,36,41,50,51,55,62,65,72,92 and a secondary outcome in 13 studies (15%). 35,40,47,52,60,69,75,76,79,81,86,87 Interventions of interest in the studies where pain was the primary outcome included hypnosis; 55 anaesthetic technique (for hysteroscopy); 51 play; 72 Reiki; 34 premedication and information; 50 different routes of paracetamol administration; 41,62 cold application; 65 guided imagery and relaxation; 22 positioning and early sandbag removal (post-coronary angiography); 92 room air versus carbon dioxide (CO 2 ) insufflation; 24,31 and bed positioning. 36 Nine studies had adult participants, 31,34,36,41,50,51,62,65,92 two were pediatric based, 55,72 and one study focused on adolescents.…”