Contrast-induced Acute Kidney Injury in Patients with Liver Cirrhosis: A Retrospective Analysis

Abstract

Contrast-induced acute kidney injury (CI-AKI) has been studied less extensively in patients with liver cirrhosis (LC). It is unclear whether the presence of severe liver disease is actually a predisposing factor for CI-AKI. Liver cirrhosis is extremely common in Pakistan and is attributed to the high prevalence of chronic viral hepatitis. Patients with LC often undergo contrast-enhanced computed tomograms (CECT) for various diagnostic and therapeutic purposes, and there have been concerns regarding them being at risk for CI-AKI. The available literature on this topic is scanty, and no study has been conducted in Pakistan. The purpose of this study, therefore, was to determine the frequency of CI-AKI in patients with LC undergoing CECT and to determine any significant predispositions. We retrospectively analyzed the records of 470 LC patients at our center. The frequency of CI-AKI in our study was 5.1%. A higher mean model for end-stage liver disease (MELD), MELD including sodium (MELD-Na), and Child-Pugh (CP) scores was significantly associated with developing CI-AKI (p<0.05). Patients with CI-AKI also had a significantly higher mean international normalized ratio (INR) and serum bilirubin levels, with lower mean venous bicarbonate and serum sodium levels (p<0.05). Our results show that patients with a more advanced liver disease and poorer synthetic function are increasingly susceptible to developing CI-AKI. Further studies can investigate the role of bicarbonate therapy in preventing CI-AKI in LC.

Keywords: acute kidney injury; contrast induced nephropathy; hepatic cirrhosis; liver cirrhosis.