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Table 2 Intraoperative course

From: Effect of moderate hypothermic circulatory arrest on neurological outcomes in elderly patients undergoing replacement of the thoracic aorta

 TotalYoung groupElderly groupp value
Surgical procedure
 Interposition graft alone, n508 (56.1%)380 (51.1%)128 (63.1%)0.024
 Interposition graft with partial arch replacement, n203 (22.4%)159 (22.6%)44 (21.7%)0.769
 Interposition graft with total arch replacement, n29 (3.2%)21 (3.0%)8 (3.9%)0.501
 Interposition graft with separated aortic valve replacement, n462 (51.0%)356 (50.7%)106 (52.2%)0.706
 Composite graft replacement of aortic root with reimplantation of coronary arteries, n149 (16.5%)124 (17.7%)25 (12.3%)0.070
 Valve sparing aortic root replacement, n63 (7.0%)56 (8.0%)7 (3.4%)0.026
 Performed CABG, n222 (24.6%)164 (23.4%)58 (28.6%)0.131
Length of surgery, min250 (203, 308)252 (205, 313)240 (200, 294)0.187
Cardiopulmonary bypass time, min142 (113, 187)144 (113, 189)139 (110, 183)0.225
Cross-clamp time, min92 (65, 125)92 (65, 127)91 (63, 116)0.348
Circulatory arrest, min14 (12, 18)14 (12, 17)15 (12, 18)0.419
Temperature, °C24 ± 224 ± 224 ± 21.0
Number of packed red blood cells, units2 (0, 4)2 (0, 4)2 (1, 4)0.002
Number of platelets concentrate, units1 (0, 1)1 (0, 2)1 (0, 1)0.753
Arterial cannulation, n
 Ascending aorta680 (80.2%)520 (78.7%)160 (85.6%) 
 Aortic arch107 (12.6%)93 (14.1%)14 (7.5%) 
 Transatrial through the left ventricle48 (5.7%)36 (5.4%)12 (6.4%) 
 Femoral artery10 (1.2%)9 (1.4%)1 (0.5%)