Table 2 Perioperative characteristics

Pre-Op Intake

Ad libitum clears

Usual Care

Difference

Height—mean (std)

173.1

11.3

174.8

11.4

-1.7

Weight—mean (std)

92

25.2

91.9

18.7

0.1

Heart rate—median (IQR)

69.5

(60, 83)

67

(60, 82)

2

Blood Pressure Systolic—mean (std)

132.3

19.8

137.4

21

-5

Blood Pressure Diastolic—mean (std)

74.8

12.1

75.1

10.8

-0.3

SpO₂—median (IQR)

97

(96, 99)

97

(96, 98)

0

ASA Class—n (%)

 I

0

0.0%

0

0.0%

0.0%

 II

5

5.6%

7

7.7%

-2.1%

 III

57

63.3%

59

64.8%

-1.5%

 IV

27

30%

25

27.5%

2.5%

 Not available (surgery cancelled)

1

1.1%

0

0.0%

1.1%

Rhythm—n (%)

 Sinus Rhythm

48

53.3%

58

63.7%

-10.4%

 Atrial Fibrillation

26

28.9%

23

25.3%

3.6%

 Other/Not Documented

16

17.8%

10

11.0%

6.8%

Time from last clear liquid to Scheduled Procedure (minutes)—median (IQR)

210

(150, 510)

570

(210, 750)

-180^a

First Case – n (%)

59

65.6%

58

63.7%

1.8%

First Case Delay (% of first cases) – n (%)

0

0.0%

4

6.9%

-6.9%

Duration of delay in minutes- median (IQR)

–

–

241

(159, 312)

–

Intra-Op

Ad libitum clears

Usual Care

Difference

Actual Procedure—n (%)

 Transcatheter Aortic Valve Replacement

21

23.3%

24

26.4%

-3.0%

 Arrhythmia Ablation

68

75.6%

67

73.6%

1.9%

 Other

1

1.1%

0

0.0%

1.1%

Type of Anesthesia—n (%)

 General with Endotracheal Tube

56

62.2%

57

62.6%

-0.4%

 Monitored Aesthesia Care/Deep Sedation

33

36.7%

34

37.4%

-0.7%

 Not applicable (surgery cancelled)

1

1.1%

0

0.0%

1.10%

Emesis—n (%)

0

0.0%

0

0.0%

0.0%

Total contrast recorded- n (%)

19

21.1%

26

28.6%

-7.5%

Total contrast—median (IQR)

60

(35, 70)

67.5

(40, 110)

-11

Vasopressor—n (%)

56

62.2%

55

60.4%

1.8%

 Phenylephrine

49

54.4%

46

50.5%

3.9%

 Epinephrine

0

0.0%

1

1.1%

-1.1%

 Norepinephrine

7

7.8%

13

14.3%

-6.5%

Total Crystalloids—median (IQR)

1453

(700, 2000)

1375

(625, 2000)

40

Any Colloids—n (%)

1

1.1%

1

1.1%

0%

Estimated Blood Loss- median (IQR)

0

(0, 5)

0

(0, 20)

0

Any allogeneic red blood cells—n (%)

1

1.1%

1

1.1%

0%

Urine Output- median (IQR)

370

(0, 600)

225

(0, 510)

25

Post-op

Ad libitum clears

Usual Care

Difference

Heart rate—median (IQR)

65

(58, 74)

64

(56, 75)

0

Blood Pressure Systolic—mean (std)

118.2

21.3

123.1

22.4

-4.9

Blood Pressure Diastolic—mean (std)

63.3

12.1

64.7

12.6

-1.4

SpO₂—median (IQR)

98

(96, 100)

97

(95, 99)

1^a

Rhythm—n (%)

 Not Documented

10

11.1%

9

9.9%

1.2%

 Sinus Rhythm

64

71.1%

65

71.4%

-0.3%

 Atrial Fibrillation

4

4.4%

3

3.3%

1.1%

 Other/Not Documented

22

24.4%

23

25.3%

-0.8%

Post-Op Labs Recorded—n (%)

61

67.8%

61

67%

0.7%

Glucose—median (IQR)

114.5

(104, 140)

118

(105, 132)

0

Bun—median (IQR)

18

(15, 21)

17.5

(14, 21)

0

Creatinine—median (IQR)

1

(0.7, 1.1)

1

(0.7, 1.1)

0.01

Supplemental O2—n (%)

8

8.9%

7

7.7%

1.2%

Ventilated postoperatively—n (%)

1

1.1%

0

0.0%

1.1%

Post-Op Opioids—n (%)

28

31.1%

24

-26.4%

4.7%

SpO2 = oxygen saturation