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Table 1 Characteristics of the study patients at baseline

From: Cardiopulmonary bypass time is an independent risk factor for acute kidney injury in emergent thoracic aortic surgery: a retrospective cohort study

Variables All patients (n = 115)
Age (year) 47.8 ± 10.7
Gender
 male 86 (74.8%)
 female 29 (25.2%)
BMI (kg/m2) 26.2 ± 3.9
Diabetes mellitus 7 (6.1%)
Hypertension 92 (80.0%)
Previous cerebrovascular disease 6 (5.2%)
Coronary artery disease 6 (5.2%)
Smoking history 56 (48.7%)
Drinking history 23 (20.0%)
Hemopericardium 19 (16.5%)
BUN (mmol/L) 7.2 ± 2.5
Preoperative sCr (umol/L) 86.2 ± 29.1
eGFR mL/(min·1.73m2) 88.6 ± 22.6
Hemoglobin (g/L) 136.5 ± 17.3
Hematocrit (%) 39.4 ± 4.6
LVEF (%) 62.9 ± 6.0
Renal artery dissection or occlusion 17 (14.8%)
Penn class
 Class Aa 70 (60.9%)
 Non class Aa 45 (39.1%)
Kidney malperfusion 7 (6.1%)
AMI 9 (7.8%)
Preoperative shock 19 (16.5%)
CPB time (min) 211 ± 56
Aortic cross clamp time (min) 123.8 ± 42.6
Circulatory arrest time (min) 27.4 ± 8.5
Bentall+TAR+FET 47 (40.9%)
Combined with CABG 8 (7.0%)
Combined with aortic bypass surgery 1 (0.9%)
Nasopharyngeal temperature (°C) at circulatory arrest 22.9 ± 1.6
Rectal temperature (°C) at circulatory arrest 25.3 ± 2.1
Intraoperative transfusion of PRBCs 73 (63.5%)
AKI 61 (53.0%)
Reoperation for bleeding 9 (7.8%)
Postoperative dialysis 23 (20.0%)
Sepsis 17 (14.8%)
Length of in hospital (day) 14.0 (10.0–18.0)
Length of ICU (day) 3.0 (1.0–6.2)
In-hospital mortality 9 (7.8%)
  1. Results are expressed as n (%) or mean ± SD or median [IQR]
  2. AKI acute kidney injury, ADTIAD acute DeBakey Type I aortic dissection, AMI acute myocardial infarction, BMI body mass index, BUN blood urea nitrogen, CABG coronary artery bypass grafting, CPB cardiopulmonary bypass, eGFR estimated glomerular filtration rate, FET frozen elephant trunk, TAR total arch replacement, ICU intensive care unit, LVEF left ventricular ejection fraction, PRBCs packed red blood cells, sCr serum creatinine, SD standard deviation, IOR interquartile range