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Table 3 Changes in cardiovascular variables during sitting and standing position grouped by orthostatic tolerance during mobilization procedure

From: Postoperative orthostatic intolerance following fast-track unicompartmental knee arthroplasty: incidence and hemodynamics—a prospective observational cohort study

Tolerance status

Pre

6 h after surgery

24 h after surgery

OT

OT

OI

p value

OT

OI

p value

Patients, no. (%)

32 (100)

24 (86)

4 (14)

 

3 (60)

2 (40)

 

Supine to sitting

 ∆SAP (mmHg)

4 (15)

11 (20)

− 4 [14]*

0.02

2 [.]

7 [.]

0.40

 ∆DAP (mmHg)

12 (11)

16 (11)

9 [12]

0.50

14 [.]

11 [.]

1.00

 ∆MAP (mmHg)

9 (13)

15 (13)

3 [17]*

0.04

8 [.]

11 [.]

1.00

 ∆HR (beats min−1)

1 (4)

2 (5)

− 2 [16]

0.64

1 [.]

0 [.]

1.00

 ∆SV (mL)

− 19 (19)

− 15 (16)

− 14 [20]

1.00

− 30 [.]

− 6 [.]

0.40

∆CO (litre min−1)

− 1.2 (1.3)

− 1.2 (0.9)

− 1.5 [2.2]

0.78

− 1.6 [.]

− 0.5 [.]

0.40

 ∆SVR (dyn s cm−5)

570 (844)

445 (458)

347 [1261]

0.83

347 [.]

556 [.]

1.00

 ∆PPI (%)

− 2 (2)

− 3 (2)

− 3 [4]

0.97

− 3 [.]

− 3 [.]

0.40

 ∆ScO2 (%)

− 1 (4)

0 (2)

− 1 [6]

0.66

1 [.]

− 1 [.]

0.20

 ∆SmO2 (%)

− 4 (4)

− 3 (5)

− 1 [6]

0.70

− 1 [.]

− 1 [.]

1.00

Supine to standing

 ∆SAP (mmHg)

10 (19)

13 (22)

− 13 [30]

0.06

4 [.]

22 [.]

0.80

∆DAP (mmHg)

15 (15)

18 (15)

5 [16]

0.10

10 [.]

14 [.]

1.00

 ∆MAP (mmHg)

14 (14)

17 (16)

− 2 [16]

0.05

9 [.]

23 [.]

0.40

 ∆HR (beats min−1)

10 (10)

11 (7)

6 [21]

0.51

9 [.]

14 [.]

0.20

 ∆SV (mL)

− 15 (20)

− 16 (21)

− 14 [36]

0.98

− 11 [.]

2 [.]

0.80

 ∆CO (litre min−1)

− 0.2 (1.8)

− 0.6 (2.1)

− 0.2 [1.7]

0.64

− 0.1 [.]

1.6 [.]

0.80

 ∆SVR (dyn s cm−5)

501 (1132)

372 (506)

27 [176]

0.10

86 [.]

26 [.]

0.80

 ∆PPI (%)

− 2 (2)

− 3 (3)

− 4 [9]

0.92

− 3 [.]

− 6 [.]

0.20

 ∆ScO2 (%)

0 (3)

− 2 (4)

0 [13]

0.52

0 [.]

0 [.]

0.80

 ∆SmO2 (%)

− 5 (5)

− 6 (5)

− 4 [5]

0.64

− 2 [.]

− 3 [.]

0.67

  1. Data presented as mean (SD) or median [IQR]
  2. SAP systolic arterial pressure, DAP diastolic arterial pressure, MAP mean arterial pressure, HR heart rate, SV stroke volume, CO cardiac output, SVR systemic vascular resistance, PP pulse pressure, PPI peripheral perfusion index, ScO2 cerebral tissue oxygenation, SmO2 muscular tissue oxygenation, OT orthostatic tolerant patients, OI orthostatic intolerant patients
  3. * p < 0.05 was statistically significant