Table 2 Average trend of BIS, heart rate, and MAP during cataract surgery between two intervention groups

Pre BIS

94.36 ± 2.95

94.40 ± 2.89

0.970

BIS 1 min

54.00 ± 12.56

56.46 ± 11.16

0.424

BIS 3 min

43.63 ± 9.70

49.40 ± 11.92

0.048

BIS 5 min

46.06 ± 10.95

47.53 ± 9.42

0.615

BIS 8 min

46.23 ± 9.29

48.26 ± 9.00

0.433

BIS 13 min

47.76 ± 9.40

48.00 ± 6.95

0.906

BIS 18 min

46.56 ± 8.35

47.3 ± 7.28

0.739

BIS 23 min

48.38 ± 13.58

48.60 ± 7.86

0.563

BIS in LMA time

84.86 ± 5.76

86.77 ± 4.23

0.219

Pre HR

75.70 ± 13.14

74.20 ± 13.47

0.664

HR 1 min

69.13 ± 12.65

66.06 ± 10.38

0.309

HR 3 min

69.37 ± 12.50

67.56 ± 10.81

0.553

HR 5 min

69.66 ± 12.67

66.03 ± 11.19

0.244

HR 8 min

69.33 ± 11.32

65.66 ± 11.74

0.233

HR 13 min

68.66 ± 12.35

63.43 ± 10.63

0.084

HR 18 min

68.96 ± 11.61

62.56 ± 9.81

0.025

HR 23 min

61.37 ± 10.36

61.80 ± 9.49

0.929

HR in LMA time

75.72 ± 13.12

71.6 ± 9.83

0.176

Pre MAP

111.32 ± 14.47

111.11 ± 14.87

0.956

MAP 1 min

88.67 ± 16.50

91.22 ± 20.43

0.598

MAP 3 min

85.30 ± 17.32

88.94 ± 18.56

0.461

MAP 5 min

83.52 ± 16.09

84.48 ± 18.74

0.831

MAP 8 min

83.84 ± 14.78

82.62 ± 15.34

0.755

MAP 13 min

80.11 ± 13.78

76.67 ± 12.81

0.322

MAP 18 min

81.91 ± 14.58

76.61 ± 12.25

0.133

MAP 23 min

84.75 ± 10.60

76.400 ± 9.09

0.091

MAP in LMA time

100.01 ± 11.76

100.48 ± 13.20

0.885