“…Exactly 21 trials [ 3 , 9 – 12 , 16 , 17 , 19 , 21 – 23 , 25 , 28 – 31 , 33 , 34 , 39 – 41 ] indicated that the insertion ease was substantially higher for i-gel™ than for LMA ProSeal™ [RR = 1.06 (1.01, 1.11), I 2 = 47%, P = 0.01] ( Fig 4 ). In addition, 23 trials [ 3 , 12 – 16 , 19 , 21 – 25 , 27 – 29 , 31 – 34 , 36 , 37 , 40 ] showed that SAD intubation time was notably shorter for i-gel™ than for LMA ProSeal™ [MD = -5.61 (-7.71, -3.51), I 2 = 98%, and P<0.00001] ( Fig 5 ). Twelve trials [ 3 , 11 , 14 , 17 , 19 , 21 , 23 , 25 , 27 , 32 , 33 , 40 ] examined the rate of gastric-tube first-insertion success and observed no great difference between the two SADs [RR = 1.04 (0.99, 1.18), I 2 = 66%, and P = 0.11] ( Fig 5 ).…”