Effects of inverse ratio ventilation with PEEP on kidney function

Figures & data

TABLE 1.  Patients' biometric data, hemodynamics, score values, operation, and transfusion data

	Patient group
Number (n)	10
Age (years)	58.4 ± 13.4
Sex (male)	10
Height (cm)	176.3 ± 7.2
Weight (kg)	71.5 ± 6.5
Body surface area (m^2)	1.80 ± 0.15
Operations
Laryngectomy	11
Neck dissection	7
Oral surgery	8
Intraoperative conditions
Mean operation time (min)	241.5 ± 34.3
Intraoperative PEEP level, pressure-controlled ventilation (cm H2O)	5.0 ± 0.6
Intraoperative infusion (mL/min/kg)	1.8 ± 0.3
Output parameters
Mean arterial pressure at admission (MAP, mmHg)	63
Creatinine in serum (mg/dL)	0.9 ± 0.3
Urea in serum (mg/dL)	28.3 ± 11.2
Sodium in serum (mg/dL)	141.4 ± 2.3
Potassium in serum (mg/dL)	4.1 ± 0.3
Urine output (mL/min/kg)	1.1 ± 0.3

FIGURE 1. Changes in central venous pressure and diuresis during the study period (1 = p < 0.05 difference to the begin of the study).

FIGURE 2. Changes in fractional excretion of sodium and atrial natriuretic period during the study period (1 = p < 0.05 difference to the begin of the study).

FIGURE 3. Changes in vasopressin and renin during the study period (1 = p < 0.05 difference to the begin of the study).

FIGURE 4. Changes in angiotensin II and aldosterone during the study period.