A 54-year-old man with decompensated cirrhosis secondary to alcohol use disorder and chron… — USMLE Step 2 CK

A 54-year-old man with decompensated cirrhosis secondary to alcohol use disorder and chronic hepatitis C infection is admitted to the hospital with a 2-day history of increasing confusion and progressive abdominal distension. He has a known history of esophageal varices for which he takes nadolol. Other home medications include spironolactone and lactulose.

On physical examination, temperature is 37.9°C (100.2°F), pulse is 92/min, and blood pressure is 98/60 mmHg. He appears lethargic but arousable, and is oriented to person only. Asterixis is present. The abdomen is markedly distended and non-tender, with shifting dullness and a positive fluid wave. There is 2+ pitting edema of the lower extremities.

Laboratory Test	Result
Hemoglobin	$10.1 \text{ g/dL}$
Platelet count	$65,000/\text{mm}^3$
Leukocyte count	$11,200/\text{mm}^3$
Serum sodium	$130 \text{ mEq/L}$
Serum potassium	$3.9 \text{ mEq/L}$
Blood urea nitrogen	$45 \text{ mg/dL}$
Serum creatinine	$1.9 \text{ mg/dL}$ (baseline $0.9 \text{ mg/dL}$ two months ago)
Total bilirubin	$4.2 \text{ mg/dL}$
Albumin	$2.6 \text{ g/dL}$
Prothrombin time, INR	$1.8$

A diagnostic paracentesis yields cloudy yellow fluid. Ascitic fluid analysis shows:

Ascitic Fluid Analysis	Result
Total protein	$1.2 \text{ g/dL}$
Albumin	$0.4 \text{ g/dL}$
Leukocyte count	$850/\text{mm}^3$ ( $82\%$ neutrophils)
Gram stain	No organisms seen

The patient is started on intravenous cefotaxime. Which of the following is the most appropriate additional step in the management of this patient?

Withhold spironolactone and nadolol, and administer intravenous albuminCevap
B
Withhold spironolactone and administer midodrine, octreotide, and intravenous albumin
C
Add intravenous vancomycin to the current antibiotic regimen
D
Increase the dose of spironolactone and perform therapeutic large-volume paracentesis
E
Continue current medications and refer for transjugular intrahepatic portosystemic shunt

Cevap

Withhold spironolactone and nadolol, and administer intravenous albumin

The patient has spontaneous bacterial peritonitis (SBP) complicated by acute kidney injury (AKI). In patients with SBP, intravenous albumin is indicated to prevent hepatorenal syndrome (HRS) if they meet any of the following criteria: serum creatinine >1.0 mg/dL, blood urea nitrogen >30 mg/dL, or total bilirubin >4.0 mg/dL. This patient meets all three criteria, making albumin administration essential. Furthermore, when a cirrhotic patient develops AKI, all nephrotoxic and hypotensive medications must be stopped. Diuretics (such as spironolactone) must be withheld to prevent further intravascular volume depletion. Additionally, current guidelines mandate the discontinuation of non-selective beta-blockers (such as nadolol) in patients with cirrhosis who develop SBP, refractory ascites, or AKI. These medications limit the compensatory increase in cardiac output required to maintain renal perfusion, thereby increasing mortality in this specific clinical context.

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Diagnose the primary acute complication

The patient has Spontaneous Bacterial Peritonitis (SBP) based on an ascitic fluid absolute neutrophil count of 697/mm³ (850 × 0.82), which is greater than the diagnostic threshold of 250/mm³.

Identifying SBP directs immediate antibiotic therapy, which has already been initiated with cefotaxime.

Identify concurrent complications

The patient has Acute Kidney Injury (AKI) with a creatinine rise from 0.9 mg/dL to 1.9 mg/dL.

Cirrhotic patients with SBP are at high risk for developing Hepatorenal Syndrome (HRS), a form of functional AKI caused by splanchnic vasodilation and renal vasoconstriction.

Determine the indications for albumin therapy in SBP

The patient meets criteria for IV albumin because his creatinine is >1.0 mg/dL, BUN is >30 mg/dL, and bilirubin is >4.0 mg/dL.

Intravenous albumin (1.5 g/kg on day 1, 1.0 g/kg on day 3) significantly reduces the incidence of HRS and mortality in patients with SBP who have renal or hepatic impairment.

Review home medications for necessary adjustments in the setting of AKI

Spironolactone and nadolol must be discontinued.

Diuretics exacerbate hypovolemia and AKI. Non-selective beta-blockers (NSBBs) like nadolol reduce compensatory cardiac output and renal perfusion, worsening outcomes in patients with severe refractory ascites, SBP, or AKI.

Anahtar Kavram

In patients with spontaneous bacterial peritonitis complicated by acute kidney injury, management requires intravenous albumin to prevent hepatorenal syndrome, alongside the cessation of diuretics and non-selective beta-blockers to preserve renal perfusion.

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