Hepatorenal syndrome

Disease Description (Causes and Symptoms)

• Definition: A condition in which kidney function rapidly deteriorates (acute kidney injury) due to impaired liver function (cirrhosis or acute liver failure), without structural disease of the kidneys themselves (hepatorenal syndrome).
• Pathophysiology summary: In end-stage liver disease, portal hypertension and splanchnic vasodilation cause systemic and splanchnic blood-flow redistribution, leading to compensatory constriction of the renal blood vessels → decreased renal blood flow → decreased glomerular filtration rate and worsening kidney function. Inflammation and infection, bleeding, excessive diuretic use, and drug-induced nephrotoxicity can worsen the condition.
• Main clinical symptoms:
  • Decreased urine output (oliguria or anuria), dark urine
  • Generalized edema, ascites, and weight gain
  • Jaundice, pruritus, hepatic encephalopathy (confusion, decreased consciousness)
  • Typical laboratory findings: acutely elevated serum creatinine/BUN, hyponatremia, hypoalbuminemia, and coagulopathy

Treatment Methods

• Treatment goals: Correct systemic blood-flow distribution → restore renal blood flow, correct triggering factors, and consider liver transplantation as definitive treatment.
• Initial and supportive treatment
  • Rapidly correct triggering factors such as severe infection (e.g., spontaneous bacterial peritonitis), bleeding, and dehydration
  • Hemostasis, antibiotics, and fluid management (hemodynamic stabilization)
  • Discontinue diuretics and avoid nephrotoxic drugs (NSAIDs, aminoglycosides, etc.)
  • Albumin administration is recommended during large-volume paracentesis (when a large amount of ascites is removed)
• Drug treatment (combination therapy with a vasoconstrictor and albumin is standard)
  • Terlipressin + intravenous albumin: the first-line treatment with the most supporting evidence (dose adjusted according to severity and regional availability). Creatinine may improve if the patient responds.
  • Norepinephrine (when intensive care unit management is available) + albumin: continuous intravenous infusion to maintain blood pressure
  • Midodrine + octreotide + albumin: used as an alternative therapy in outpatient or general-ward settings
  • Albumin administration: plasma-volume replacement and treatment support (usual dosage: initially 1 g/kg [maximum 100 g], followed by 20–40 g/day — adjusted according to the patient’s condition)
• Critical care and replacement therapy
  • Renal replacement therapy (dialysis): performed temporarily and supportively when the patient’s overall condition is unstable or when uremia, electrolyte abnormalities, cyanosis, etc. are present
• Definitive treatment
  • Liver transplantation: May allow partial recovery of kidney function in hepatorenal syndrome and is the only definitive treatment. Depending on whether kidney function recovers, liver transplantation alone or simultaneous liver-kidney transplantation may be considered
• Monitoring and precautions
  • Frequently monitor hemodynamics (blood pressure and heart rate), urine output and weight, electrolytes, kidney function (creatinine), and liver function (bilirubin, albumin, and INR)
  • Monitor for ischemic complications (peripheral ischemia, myocardial ischemia, etc.) when using vasoconstrictors

Checkpoints Before an Outpatient Visit (Including Example Questions)

• Items to prepare (recommended to bring)
  • A list of all currently used medications and supplements (including doses and administration times)
  • Recent test results (serum creatinine, BUN, electrolytes, liver function tests — AST/ALT/total bilirubin/albumin/INR, CBC)
  • Urinalysis results (if available) and a record of urine output (total daily amount/changes by time of day)
  • Recent weight changes, whether ascites is present, and results of drainage or paracentesis (if available)
  • Recent history of infection, bleeding, or hospitalization (especially peritonitis and gastrointestinal bleeding)
  • Abdominal ultrasound, CT, and endoscopy reports (tests related to the liver and kidneys)
  • Information about alcohol consumption and lifestyle habits
• Key items the doctor will check in an outpatient setting (self-reported)
  • Onset and progression of symptoms (e.g., how many days urine output has been reduced)
  • Whether fever, abdominal pain, vomiting, abdominal distension, or bleeding symptoms are present
  • Whether paracentesis or antibiotic treatment was recently performed or administered, and when
• Prohibitions/precautions before the visit
  • Stop taking NSAIDs and potentially nephrotoxic medications (after consulting a doctor)
  • Preparing thorough records (urine output and weight) can help with diagnosis and treatment planning

General Example Questions to Ask the Doctor

• "How much has my kidney function worsened, and what is my prognosis?"
• "What is the purpose and expected effect of this treatment (vasoconstrictor + albumin)? What are the side effects?"
• "What are the criteria for needing renal replacement therapy (dialysis)?"
• "Do I meet the indications for liver transplantation, and what is the waiting-list registration process and expected timing?"
• "What lifestyle guidelines should I follow at home (diet, medications, and fluid management)?"

Disease-Specific Example Questions

• "What symptoms (such as coldness of the extremities, chest pain, or limb pain) should I report during treatment with terlipressin (or norepinephrine)?"
• "What is the plan for albumin administration after paracentesis, and are prophylactic antibiotics or tests needed?"
• "When I am evaluated as a liver-transplant candidate, what criteria (duration and tests) are used to determine whether my kidney function has improved?"

(Note: Detailed diagnostic criteria, dosages, and indications for treatment vary depending on the patient’s condition, hospital resources, and country-specific guidelines. Please consult the treating specialist for accurate testing, medication administration, and assessment of transplant eligibility.)