Renal Recovery and Mortality Risk among Patients with Hepatorenal Syndrome Receiving Chronic Maintenance Dialysis

Dialysis initiation for patients with decompensated cirrhosis when liver transplant is unlikely

PURPOSE OF REVIEW

The purpose of this review is to describe an approach that emphasizes shared decision-making for patients with decompensated cirrhosis and acute kidney injury when liver transplantation is either not an option, or unlikely to be an option.

RECENT FINDINGS

When acute kidney injury occurs on a background of decompensated cirrhosis, outcomes are generally poor. Providers can also be faced with prognostic uncertainty. A lack of guidance from nephrology and hepatology professional societies means that providers rely on expert opinion or institutional practice patterns.

SUMMARY

For patients who are unlikely to receive liver transplantation, the occurrence of acute kidney injury represents an opportunity for a goals of care conversation. In this article, we share strategies through which providers can incorporate more shared decision-making when caring for these patients. The approach involves creating prognostic consensus amongst multidisciplinary teams and then relying on skilled communicators to share the prognosis. Palliative care consultation can be useful when teams need assistance in the conversations.

Hepatorenal Syndrome Type 1: Diagnosis and Treatment

Hepatorenal syndrome (HRS) is a feared complication in patients with advanced cirrhosis and is associated with significant morbidity and mortality. While recognized as a distinct physiologic condition for well over one hundred years, a lack of objective diagnostic tests has made the diagnosis one of exclusion. Since 1979, multiple sets of diagnostic criteria have been proposed. Though varying in detail, the principal intent of these criteria is to identify patients with severe, functional acute kidney injury that is unresponsive to volume resuscitation and exclude those with structural injury. However, accurate differential diagnosis remains challenging. Recently, multiple urinary biomarkers of kidney injury, including neutrophil gelatinase-associated lipocalin, have been studied as a means of objectively phenotyping etiologies of acute kidney injury in patients with cirrhosis. Along with markers reflecting tubular functional integrity, including the fractional excretion of sodium, injury markers will likely be incorporated into future diagnostic criteria. Making an accurate diagnosis is critical, as therapeutic options exist for HRS but must be given in a timely manner and only to those patients likely to benefit. Terlipressin, an analog of vasopressin, is the first line of therapy for HRS in much of the world and has recently been approved for use in the United States. Significant questions remain regarding the optimal dosing strategy, metrics for titration, and the potential role of point-of-care ultrasound to help guide concurrent albumin administration.

Outcomes among patients with hepatorenal syndrome based on hospital teaching and transplant status: Analysis of 159 845 hospitalizations

Background and Aim

Hepatorenal syndrome (HRS) is a life-threatening complication of advanced liver disease. This study aimed to examine the impact of hospital teaching/transplant status and availability of liver transplantation on survival among hospitalized patients with HRS in the United States.

Methods

Patients with HRS were identified from the national inpatient sample 2016-2019. Information was collected regarding patient demographics, hospital characteristics, liver disease etiology, presence of liver disease decompensations, Elixhauser comorbidities, and interventions. Patients were classified as being treated at three hospital groups: non-teaching hospitals (NTHs), teaching non-transplant centers (TNTCs), and teaching transplant centers (TTCs). The relationship between hospital teaching/transplant status and in-hospital mortality and transplant-free mortality was examined using multivariable linear and logistic regression analysis.

Results

A total of 159,845 patients met the criteria for HRS. Of these, 24% were admitted to NTHs, 50.8% to TNTCs, and 25.2% to TTCs. Admission to a TTC was independently associated with a lower mortality risk compared to admission to non-TTCs (aOR = 0.75, 95% CI: 0.68-0.83, P <0.001). Patients at TTCs had a lower transplant-free mortality risk than those at NTHs (aOR = 0.75, 95% CI: 0.67-0.83, P < 0.001). There was no significant difference in all-cause or transplant-free mortality between TNTCs and NTHs.

Conclusion

Patients with HRS admitted to TTCs have higher disease severity, but significantly improved outcomes compared to those admitted to NTHs. These data suggest opportunities for increased disease awareness and education among NTHs and support early referral for liver transplant evaluation among hospitalized patients with HRS.

Hepatorenal Syndrome: Pathophysiology, Diagnosis, and Treatment

Hepatorenal syndrome (HRS) is a primarily functional form of acute kidney injury (AKI) that develops in patients with decompensated cirrhosis. The pathophysiologic cascade that leads to HRS begins with pooling of blood in the splanchnic system, resulting in a decrease in effective circulating arterial volume. The definitive treatment of HRS is liver transplantation. When this is not possible, HRS is treated with a combination of vasoconstrictor agents and intravenous albumin. Although the combination of midodrine and octreotide is used in the United States, the recently approved terlipressin, an analog of vasopressin, is likely to become the first-line standard of care.

Kidney disease in patients with chronic liver disease: Does sex matter?

Kidney disease in patients with liver disease is serious and increases mortality. Up to 50% of patients hospitalized experience an episode of acute kidney injury. In general, men with liver disease are thought to be at increased risk of kidney disease. However, this association should be considered with caution because most studies use creatinine-based inclusion criteria, which is negatively biased against women. In this review, we synthesize data on sex differences in kidney disease in patients with chronic liver disease in the clinical setting and discuss potential physiologic underpinnings.