Suzanne E. Minor, MD, FAAFP Irmanie Eliacin, MD Sanaz Kashan, MD Ebony B. Whisenant, MD Florida International University, Herbert Wertheim College of Medicine, Miami seminor@fiu.edu
The authors reported no potential conflict of interest relevant to this article.
Hepatorenal syndrome is renal failure induced by severe hepatic injury and characterized by azotemia and decreased renal blood flow and glomerular filtration rate.15 It is a diagnosis of exclusion. Hepatorenal syndrome is typically caused by arterial vasodilation in the splanchnic circulation in patients with portal hypertension.15,26,27 Type 1 hepatorenal syndrome is characterized by at least a 2-fold increase in serum creatinine to a level of >2.5 mg/dL over more than 2 weeks. Patients typically have urine output <400 to 500 mL/d. Type 2 hepatorenal syndrome is characterized by less severe renal impairment; it is associated with ascites that does not improve with diuretics.28
Endoscopic variceal ligation is an alternative to nonselective beta-blockers for preventing variceal hemorrhage in patients with medium to large varices.
Patients with hepatorenal syndrome should not use any nephrotoxic agents, such as nonsteroidal anti-inflammatory drugs. Inpatient treatment is usually required and may include norepinephrine with albumin, terlipressin with midodrine, or octreotide and albumin. Patients who fail to respond to medical therapy may benefit from TIPS as a bridge until they can undergo liver transplantation.29
When to consider liver transplantation
The appropriateness and timing of liver transplantation should be determined on a case-by-case basis. For some patients with cirrhosis, transplantation may be the definitive treatment. For example, in some patients with hepatocellular carcinoma (HCC), liver transplantation is an option because transplantation can cure the tumor and underlying cirrhosis. However, while transplantation is a suitable option for early HCC in patients with cirrhosis, it has been shown to have limited efficacy in patients with advanced disease who are not selected using specific criteria.30
Referral for evaluation for transplantation should be considered once a patient with cirrhosis experiences a major complication (eg, ascites, variceal hemorrhage, or hepatic encephalopathy).31 Another criterion for timing and allocation of liver transplantation is based on the statistical model for end-stage liver disease (MELD), which is used to predict 3-month survival in patients with cirrhosis based on the relationships between serum bilirubin, serum creatinine, and international normalized ratio values.15 Liver transplantation should be considered for patients with a MELD score ≥15.15,31 Such patients should be promptly referred to a liver transplantation specialist to allow sufficient time for the appropriate psychosocial assessments and medical evaluations, and for patients and their families to receive appropriate education on things like the risks and benefits of transplantation.15