The correct answer is Apleural fluid to blood Lactic dehydrogenase ratio >0.6 for exudative pleural effusion
pleural fluid to blood Protein ratio >0.5 for pleural effusion
High amylase levels indicate probable esophageal perforation
Selected Exudates (There are many other causes besides these)
- Parapneumonic – uncomplicated: LDH less than 700, glucose=”serum,” pH >7.30
- Parapneumonic – complicated: LDH >1000, glucose less than 40, pH less than 710
- TB – lymphocytic exudate; pleural biopsy is diagnostic
- Carcinoma – bloody, lymphocytic exudate, cytology or biopsy positive; if LDH only is abnormal – think cancer; pH less than 7.30 associated with poor prognosis and poor response to sclerotherapy
- Esophageal perforation – pH 6.00, high amylase (salivary)
- Rheumatoid pleurisy – turbid, yellow-green, debris- laden fluid; LDH >1000, glucose less than 30, pH 7.00, RF >1.320
- Lupus – LE cells in effusion (increase if fluid sits up to 24 hours): occasionally low glucose and pH
- Post-cardiac injury syndrome – pleuritic pain, rub, fever 3 weeks after injury; left infiltrates, serosanguineous – no diagnostic labs
- Pulmonary embolism – nothing characteristic; fluid maximal by 72 hours
- Pancreatitis – usually left sided, pleural fluid amylase: serum amylase >1.0; amylase may be >100,000 with pseudocyst
- Asbestos pleural effusion – asymptomatic; bloody exudate, unilateral
Trapped lung – unilateral; serous, “borderline” exudate, very low pleural liquid pressure, rapid reaccumulation- Chylothorax – lymphocytic, milky; chylomicrons in fluid, TG >110 mg/dl
- Lymphangiomyomatosis – chylothorax in young women, interstitial disease, normal lung volumes, repeated pneumothoraces
- Yellow nail syndrome – 40 years old with yellow nails, lymphedema, respiratory tract involvement, triad not simultaneous; pleurodesis effective
Category:
Karnataka PGET 2007 MCQs
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