Biomarcadores renais de lesão glomerular e tubular em pacientes submetidos à cirurgia arterial / Biomarkers of renal glomerular and tubular injuries in patients anesthetized for arterial surgery

RESUMO

Objetivos: Estudar a função renal de pacientes arteriopatas submetidos a cirurgia vascular, avaliando a concordância entre as estimativas do ritmo de filtração glomerular (RFG) obtidos pela aferição da creatinina e cistatina C plasmática, verificando se diabetes, hipertensão e função renal pré-operatórias apresentam relação com função tubular no pós-operatório e investigando a possível influência da hemodiluição na avaliação da função renal por meio da cistatina C. Casuística e métodos: Trata-se de estudo de coorte, prospectivo, incluindo 144 pacientes consecutivos submetidos à anestesia para cirurgia arterial e distribuídos em 4 grupos, sendo (GDH), diabéticos e hipertensos, (GD), diabéticos, (GH), hipertensos e (GN), sem hipertensão ou diabetes. Foram obtidos urina para dosagens laboratoriais de creatinina urinária (Ucr) (mmol , fosfatase alcalina (FA) (U , -glutamiltransferase ( GT) (U e sangue para dosagem de albumina (g/dL), globulina (g/dL) uréia (mg/dL), creatinina (mg/dL), cistatina C (mg/L) e aferida a osmolaridade plasmática (mOsm/L) no pré-operatórios (M1) e após 24 horas do término da cirurgia (M2). As estimativas do RFG foram comparadas pelo método de Bland-Altman...

ABSTRACT

Objective: The aim of this study was to study the renal function of patients submitted to anaesthesia for arterial surgery, evaluating the agreement between GFR equations by cystatin C and creatinine, checking whether preoperative diabetes, hypertension, and renal function had any relationship with postoperative tubule function, and investigating possible hemodilution influence in cystatin C GFR based equations. Casuistry and Methods: Prospective cohort study including 144 patients submitted to anaesthesia for arterial surgery enrolled consecutively and divided into four groups (GDH), diabetes and hypertension, (GD), diabetes, (GH), hypertension, and (GN), without hypertension or diabetes. Urine was obtained for laboratory analysis of urinary creatinine (Ucr) (mmol , alkaline phosphatase (AP) (U , -glutamyltransferase ( GT) (U , and blood for albumin (g/dL), globulin (g/dL), urea (mg /dL), creatinine (mg /dL), cystatin C (mg/L), and the plasma osmolarity (mOsm/L), before (M1) and 24h after the end of surgery (M2). Bland and Altman analysis was used to assessing agreement between two methods of GFR of measurements...