Table 1

Average number of minor and major flow disruptions per hour and per case for different types of surgeries as well as the three different ORs

Surgery type	Cases (n)	Average observation time (min)	Minor disruptions		Major disruptions
Surgery type	Cases (n)	Average observation time (min)	Average per observation	Average per hour	Average per observation	Average per hour
Paediatric	12	51	70	81.7	20	24
Laparotomy	1	86	78	55	23	16
Hernia repair	2	114	82	43	23	12
Gastric bypass	3	146	90	37	52	21
Esophagogastroduodenoscopy	2	94	51	32	16	10
Cholecystectomy	5	69	35	31	15	13
Band removal	3	102	74	44	29	17
OR type
OR 1	16	99	63	38	26	16
OR 2	4	44	131	178	45	61
OR 3	8	54	38	42	8	8