May Renal Resistive Index Be an Early Predictive Tool of Postoperative Complications in Major Surgery? Preliminary Results

Table 2

Risk factors and RRI>0.7.

	Global population			Cardiothoracic population
	RRI<0.7	RRI>0.7	𝑃	RRI<0.7	RRI>0.7	𝑃
𝑁	145	60		80	42
Male (𝑛)	101 (69.66%)	38 (63.33%)	0.378	57 (71.25%)	29 (69.05%)	0.800
Age (years)	60±15	65±13	0.045	60±17	62±13	0.388
BMI (Kg/m^2 body surface area)	25.0±3.9	26.4±3.8	0.020	25.4±4.1	26.7±4.1	0.092
ASA (3-4)	65 (44.83%)	37 (61.67%)	0.028	48 (60.00%)	28 (66.67%)	0.470
Smoking (𝑛)	62 (42.76%)	36 (60.00%)	0.025	32 (40.00%)	26 (61.90%)	0.021
Diabetes (𝑛)	13 (8.97%)	13 (27.67%)	0.020	7 (8.75%)	6 (14.29%)	0.367
Hypertension (𝑛)	65 (44.83%)	35 (58.33%)	0.078	35 (43.75%)	23 (57.76%)	0.247
COPD (𝑛)	28 (19.31%)	15 (25.00%)	0.363	14 (17.50%)	7 (16.67%)	1.000
Myocardiopathy (𝑛)	61 (42.07%)	33 (55.00%)	0.091	41 (51.25%)	23 (54.76%)	0.712
Serum creatinine (mg/dL)	0.90±0.38	1.08±0.60	0.005	0.96±0.49	1.17±0.69	0.029
EF (%)	56±8	53±8	0.127	56±9	53±9	0.149
EDV (mL)	151±21	133±35	0.049	156±9	138±34	0.124
Urine albumin (𝑛)	8 (5.52%)	8 (13.33%)	0.083	5 (6.25%)	5 (11.90%)	0.310
Systolic arterial pressure (SAP) mmHg	130±18	131±21	0.813	129±17	125±17	0.274
Diastolic arterial pressure (DAP) mmHg	73±11	71±12	0.164	73±10	69±11	0.013
Mean arterial pressure (MAP) mmHg	89±15	87±17	0.204	87±14	82±13	0.058
Heart Rate (bpm)	76±13	74±12	0.518	76±12	75±11	0.744
Haematocrit (%)	39.9±5.2	37.8±5.7	0.030	40±5	37±6	0.014
Surgical APGAR score (points)	7 (1–10)	7 (1–10)	0.520	6 (1–10)	6.5 (1–10)	0.913

Blood pressure and heart rate were recorded when patients arrived in operative room but before any drug administration.
Surgical Apgar Score was calculated at the end of operation as it considers three items that have to be recorded after surgery completion.