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Table 3 Concordance rates for every measurement time point compared to its preceding measurement time point

From: Comparison of oscillometric, non-invasive and invasive arterial pressure monitoring in patients undergoing laparoscopic bariatric surgery – a secondary analysis of a prospective observational study

Time points

SAP (NIBP)

DAP (NIBP)

MAP (NIBP)

SAP (Nexfin®)

DAP (Nexfin®)

MAP (Nexfin®)

1→2

27/52

68% (8/25)

20/51

68% (16/31)

28/53

48% (13/25)

27/52

40% (15/25)

20/52

33% (21/32)

28/53

32% (17/25)

2→3

1/49

93% (3/48)

5/49

98% (1/44)

3/52

87% (6/49)

1/52

97% (1/51)

5/52

100% (0/47)

3/52

97% (1/49)

3→4

13/48

82% (6/35)

13/48

89% (4/35)

10/48

89 % (4/38)

13/53

88% (5/40)

13/53

85% (6/40)

11/53

88 % (5/42)

4→5

21/50

68% (9/29)

16/50

75% (8/34)

18/50

84% (5/32)

22/53

89% (3/31)

18/53

86% (5/35)

20/53

78% (7/33)

5→6

7/27

90% (2/20)

9/27

82% (3/18)

8/27

84% (3/19)

7/28

89% (2/21)

9/28

95% (1/19)

8/27

94% (1/19)

6→7

10/26

87% (2/16)

5/26

89% (2/21)

6/25

94% (1/19)

11/27

94% (1/16)

5/27

82% (4/22)

6/26

90% (2/20)

7→8

7/52

84% (7/45)

8/52

91% (4/44)

5/51

91% (4/46)

8/54

87% (6/46)

8/54

88% (5/46)

6/54

95% (2/48)

8→9

11/55

84% (7/44)

10/56

91% (3/46)

9/53

88% (5/44

12/55

91% (4/43)

10/55

90% (4/45)

10/55

93% (3/45)

9→10

11/51

95% (2/40)

15/52

92% (3/37)

11/51

97% (1/40)

11/54

85% (6/43)

15/54

77% (9/39)

11/55

90% (4/44)

10→11

11/54

84% (7/43)

10/54

83 (7/44)

11/53

90% (4/42)

11/55

89% (5/44)

11/55

83% (7/44)

11/55

90% (4/44)

11→12

8/53

87% (6/45)

9/53

85% (6/44)

7/51

93% (3/44)

8/55

90% (4/47)

9/55

90% (4/46)

7/55

93% (3/48)

12→13

3/52

90% (5/49)

3/52

80% (10/49)

4/51

91% (4/47)

3/55

93% (3/52)

3/55

91% (4/52)

4/55

96% (2/51)

13→14

7/49

86% (6/42)

11/50

90% (4/39)

11/48

91% (3/37

9/51

93% (3/42)

11/51

88% (5/40)

11/51

92% (3/40)

15→16

9/36

91% (3/33)

16/36

60% (8/20)

13/36

91% (2/23)

9/35

62% (10/26)

16/35

62% (7/19)

13/34

71% (6/21)

  1. Measurements with a measured delta of less than 5% to the reference IAP were excluded (upper left number), followed by the total number of all feasible measurements during the specific time point. Changes with a unidirectional (negative or positive) delta are displayed as percentages (lower left number) followed by the number of measurements with contradicting delta out of all data pairs with a delta of more than 5%. Example: After the first hemodynamic stress (30° Anti-Trendelenburg positioning), 27 measurements of systolic arterial pressure measured by NIBP varied less than 5% compared to the preceding measurement out of a total of 52 feasible measurements. Out of the remaining 25 significant (eg. greater than 5% delta) measurements, 8 showed contradictional changes of the invasive arterial pressure, indicating reliability of the tested measurement method in 17 cases, resulting in a concordance rate of 68%