Examkin

Soru

Zorluk: Çok zorGastroenterology and Hepatology

A series of patients undergo diagnostic paracentesis for newly developed or worsening ascites. Based on the provided laboratory and clinical findings, match each patient's ascitic fluid profile with the most accurate underlying pathophysiologic mechanism and diagnosis.

  • Serum albumin: 3.23.2 g/dL, Ascitic albumin: 1.51.5 g/dL, Ascitic total protein: 1.81.8 g/dL, Ascitic WBC: 180180 cells/mm 3^3 (30%30\% neutrophils). Physical examination reveals spider angiomata and caput medusae.Sinusoidal portal hypertension with impaired hepatic synthetic function (uncomplicated cirrhotic ascites)
  • Serum albumin: 3.83.8 g/dL, Ascitic albumin: 2.22.2 g/dL, Ascitic total protein: 3.13.1 g/dL, Ascitic WBC: 150150 cells/mm 3^3 (20%20\% neutrophils). Physical examination reveals elevated jugular venous pressure and a pericardial knock.Post-hepatic portal venous congestion with preserved hepatic synthetic function (cardiac ascites)
  • Serum albumin: 3.53.5 g/dL, Ascitic albumin: 2.82.8 g/dL, Ascitic total protein: 4.24.2 g/dL, Ascitic WBC: 800800 cells/mm 3^3 (70%70\% lymphocytes). The patient has a 22-month history of night sweats and weight loss.Exudative peritoneal inflammation secondary to chronic granulomatous infection (tuberculous peritonitis)
  • Serum albumin: 2.82.8 g/dL, Ascitic albumin: 1.21.2 g/dL, Ascitic total protein: 1.51.5 g/dL, Ascitic WBC: 850850 cells/mm 3^3 (80%80\% neutrophils). The patient has chronic hepatitis C virus infection and presents with new-onset fever.Sinusoidal portal hypertension complicated by acute bacterial translocation (spontaneous bacterial peritonitis)
  • Serum albumin: 3.93.9 g/dL, Ascitic albumin: 3.23.2 g/dL, Ascitic total protein: 3.83.8 g/dL. Ascitic fluid is milky-white with triglycerides of 650650 mg/dL. The patient is postoperative day 44 following a retroperitoneal lymph node dissection.Direct extravasation of lipid-rich lymphatic fluid into the peritoneal cavity (chylous ascites)

Cevap

Profile 1 matches uncomplicated cirrhotic ascites; Profile 2 matches cardiac ascites; Profile 3 matches tuberculous peritonitis; Profile 4 matches spontaneous bacterial peritonitis; Profile 5 matches chylous ascites.
The correct pairings rely on calculating and integrating the SAAG, total protein, and ANC. Profile 1 shows a high SAAG, low protein, and low ANC (uncomplicated cirrhosis). Profile 2 shows a high SAAG and high protein (cardiac ascites). Profile 3 shows a low SAAG with lymphocyte predominance (tuberculosis). Profile 4 shows a high SAAG, low protein, and an ANC >250> 250 cells/mm 3^3 (SBP). Profile 5 shows a low SAAG with severely elevated triglycerides (chylous ascites).

Adım Adım Çözüm

1
Calculate the Serum-Ascites Albumin Gradient (SAAG) for each profile by subtracting the ascitic albumin from the serum albumin.
SAAG ≥1.1\geq 1.1 g/dL indicates portal hypertension; SAAG <1.1< 1.1 g/dL indicates an alternative exudative or non-portal hypertensive cause.
SAAG is the most accurate initial step in determining the broad etiology of ascites.
2
Evaluate the ascitic fluid total protein in profiles with SAAG ≥1.1\geq 1.1 g/dL.
Ascitic protein ≥2.5\geq 2.5 g/dL indicates preserved hepatic synthesis (post-hepatic/cardiac), while <2.5< 2.5 g/dL indicates impaired synthesis (cirrhosis).
This differentiates the underlying source of portal hypertension.
3
Calculate the absolute neutrophil count (ANC) by multiplying ascitic WBC by the neutrophil percentage.
An ANC ≥250\geq 250 cells/mm 3^3 diagnoses spontaneous bacterial peritonitis.
Ascites can be complicated by acute infection, requiring immediate identification for antibiotic therapy.
4
Assess for unique markers such as lymphocyte predominance or markedly elevated triglycerides in low SAAG profiles.
Lymphocytes suggest tuberculous peritonitis; triglycerides >200> 200 mg/dL indicate chylous ascites.
Specific etiologies of non-portal hypertensive ascites have distinct cellular and biochemical markers.

Anahtar Kavram

Interpretation of ascitic fluid analysis (SAAG, total protein, cell counts, and specific biochemistries) to determine the pathophysiology and etiology of ascites.
Bu soruyu puanla

Konular

Gastroenterology and Hepatology

Bu konudan daha fazla soru