Higher Mean Arterial Pressure during Cardiopulmonary Bypass May Not Prevent Acute Kidney Injury in Elderly Patients Undergoing Cardiac Surgery

Table 2

Intraoperative data.

	HPG (n = 42)	LPG (n = 50)	value	95% CI
Aortic cross-clamp time (min)	105.33 ± 36.21	100.92 ± 45.14	0.611	−12.77 to 21.59
CPB time (min)	145.45 ± 48.55	142.12 ± 54.62	0.760	−18.27 to 24.93
Operation time (min)	268.70 ± 100.32	303.04 ± 83.88	0.077	−72.49 to 3.80
Postoperative LVEF (%)	56.22 ± 7.25	57.28 ± 7.59	0.501	−4.18 to 2.06
AP (mmHg)	68.97 ± 3.65	61.14 ± 5.54	<0.001	−5.89 to 9.75
Type of Surgery, n			0.753
MVR	7	8
AVR	20	25
MVR + AVR	14	17
TVP	1	0
Hct during CPB (%)	27.75 ± 2.37	27.10 ± 2.03	0.162	−0.26 to 1.56
Hct at the end of surgery (%)	29.83 ± 3.92	29.20 ± 3.55	0.429	−0.92 to 2.18
Red-cell transfusions (u)	1.11 ± 1.73	1.27 ± 1.94	0.677	−0.95 to 0.62
Plasma transfusions (ml)	140.95 ± 232.55	185.80 ± 285.72	0.417	−154.14 to 64.44
Fluid balance (ml)	1754.76 ± 831.75	1650.00 ± 777.82	0.535	−229.08 to 438.60
Urine output (ml)	694.52 ± 718.03	662.50 ± 480.24	0.799	−217.62 to 281.671

Continuous data are presented as mean ± standard deviation; HPG, high-pressure group; LPG, low-pressure group; CI, confidence interval; CPB, cardiopulmonary bypass; LVEF, left ventricular ejection fraction; AP, arterial pressure; AVR, aortic valve replacement; MVR, mitral valve replacement; TVP, tricuspid valvuloplasty; Hct, hematocrit.