Elevation of the head of bed reduces splanchnic blood flow in patients with intra-abdominal hypertension

BMC Anesthesiology

Table 1 Characteristics of the patients

Variable	n = 53
Sex, n, female/male	33/20
Age, years	56 ± 13
BMI (kg/m²)	25.6 ± 2.3
CVP (mmHg)	10(9–11)
PH	7.40(7.38–7.42)
PaO₂/FiO₂ (mmHg)	215(193–292)
ScvO₂ (%)	69.9 ± 5.9
Pv-aCO₂ (mmHg)	4 ± 2
Lactate (mmol/L)	1.7(1.2–2.6)
SOFA	10(9–11)
Vasopressor support, n (%)	46 (86.8)
Cause of Intra-abdominal hypertension
Complications after surgery^a, n (%)	35 (66.0)
Sepsis^b, n (%)	14 (22.7)
colon obstruction, n (%)	3 (5.7)
pancreatitis, n (%)	1(1.9)

Continuous data are expressed as mean ± standard deviation or median and interquartile range
Abbreviations: BMI, body mass index; CVP, central venous pressure; PH, hydrogen ion concentration; PaO₂, partial pressure of oxygen in arterial blood; FiO₂, fraction of inspired oxygen; ScvO₂, superior vena cava oxygen saturation; Pv-aCO₂, arterial and venous carbon dioxide partial pressure difference; SOFA, sequential organ failure assessment
^a Surgery (35): heart valve replacement surgery (19), pericardial stripping surgery (5), esophageal cancer surgery (2), severe multiple trauma(3), neurosurgery(4), descending colon surgery(2); ^b Sepsis (14): severe pneumonia(11), biliary infection(3)

ISSN: 1471-2253