pulmonary morning report · morning report ashley schmehl d.o. pgy-3 . january, 8 2015 . pleural...
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Pulmonary Morning Report
Ashley Schmehl D.O. PGY-3
January, 8 2015
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Pleural Effusion
• Unilateral versus Bilateral • Associated symptoms • Transudate versus Exudate
– Light’s Criteria: • Pleural protein: Serum protein > 0.5 • Pleural LDH: Serum LDH > 0.6 • Pleural LDH > 2/3x normal serum LDH (260)
• 97% sensitivity, 80% specificity
– Reappraisal of the standard method (Light's criteria) for identifying pleural exudates
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Pleural Fluid Analysis
– Gross Evaluation – Protein, LDH (serum
too!) – Gram stain/Bacterial cx – AFB culture – Cholesterol – Triglycerides – Glucose
– pH – Amylase – Adenosine deaminase
(ADA) – CBC with differential – Cytology – N-terminal pro-BNP
What tests should you consider?
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Gross Evaluation
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• Transudate – Results from fluid migration across intact capillary beds
• Exudate – Results from fluid migration across dilated capillary beds
Transudate/Exudate
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Transudate/Exudate Transudate Only Sometime Transudate,
Usually Exudate Exudate Only
Atelectasis Amyloidosis Heart Failure (post-diuresis)
CSF Leak Chylothorax Infectious
Hepatic hydrothorax Constrictive Pericarditis Iatrogenic
Hypoalbuminemia Hypothyroid Malignancy
Iatrogenic Malignancy Connective tissue disorder
Nephrotic Syndrome PE Endocrine dysfunction
Peritoneal dialysis Sarcoidosis Abdominal fluid mvt
Urinothorax Superior vena caval obstruction
Heart Failure (pre-diuresis)
Trapped lung
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Gram Stain/Culture
• Culture: Bacterial, AFB, Viral, Fungal
Bacterial: • Community acquired infection:
– Strep species- about 50% – Staph aureus- about 10% – Gram neg aerobes; Enterobacteriaceae and Escherichia coli-10% – Anaerobes; Fusobacterium, Bacteroides, and Peptostreptococcus species-20%
• Hospital acquired infection:
– MRSA - about 25% – MSSA- about 10% – gram-negative aerobes; E. coli, Pseudomonas aeruginosa, and Klebsiella
species- 17% – anaerobes - 8%
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Cholesterol
• Help to diagnose exudate (>45 mg/dL)
• If >250 mg/dL = cholesterol effusion
• Cholesterol effusion ≠ chylothorax
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• Etiology: – Degenerating cells and vascular leakage from
increased permeability – Accumulation of lipids during inflammation
• Causes:
– Tuberculous – Chronic rheumatoid pleural effusions
Cholesterol Effusion
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Triglycerides
• Chylothorax Effusion
• Diagnosis:
– Pleural Triglycerides > 110 mg/dL – Pleural lipoprotein electrophoresis
chylomicrons
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• Etiology: – Lymph fluid from the thoracic duct/lymphatic channels accumulate in
the pleural space due to disruption or obstruction
• Causes:
– Traumatic (Surgery) • Esophagectomy, pulmonary resection with lymph node dissection
and congenital heart disease sx
– Nontraumatic • Filariasis, Lymphoma, leukemia or metastatic malignancy
Chylothorax Effusion
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Glucose
• If low, helps narrow differential • Normal= >60 mg/dL • If <60 mg/dL:
– Rheumatoid pleurisy – Complicated parapneumonic effusion or empyema – Malignant effusion – TB pleurisy – Lupus pleuritis – Esophogeal rupture
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• If low, due to: – Decreased transport (rheumatoid or malignancy) – Increased use (infx, malignant cells, PMN’s)
Glucose
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pH
• Measure with blood gas machine • Normal = pH 7.60 • Transudates: 7.40-7.55 • Exudates: 7.30-7.45 • Causes:
– Increased H+ production (bacteria-empyema) – Decreased H+ efflux (rheumatoid pleurisy, TB pleurisy,
malignancy)
• For pH < 7.15, high likelihood for needing pleural space drainage
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Amylase
• Can help to determine if pancreatic or esophageal source
• If exudate effusion + : 1. Pleural amylase > serum normal value OR 2. Pleural:serum amylase > 1, narrows differential to:
• Acute pancreatitis • Chronic pancreatic pleural effusion • Esophageal rupture • Malignancy • Rarely- ectopic pregnancy, pneumonia, hydronephrosis,
cirrhosis
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Adenosine Deaminase (ADA)
• Useful in differentiating malignancy vs TB • If exudative effusion is lymphocytic but
cytology and TB smear is negative: – ADA >35 U/L is consistent with TB
• Specificity ↑ when ADA >50 U/L
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• RBC – >100,000 suggests:
• Malignancy • Trauma • Parapneumonic effusion • PE
CBC and Differential
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CBC and Differential
• WBC’s – >50,000/microL complicated parapneumonic
effusions (incl empyema) – >10,000/microL bacterial PNA, acute
pancreatitis, lupus pleurisy – <5,000/microL chronic exudate (TB, CA)
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• Lymphocytosis – If 85-95% of total WBC
• TB • Lymphoma • Sarcoidosis • Chronic RA • Yellow nail syndrome • Chylothorax
CBC and Differential
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Cytology
• If nondiagnostic and malignancy is concern, obtain thoracoscopy with bx (Grade C recommendation)
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N-terminal pro-BNP
• Biologically inactive
• Secreted along with BNP
• Blood levels are helpful in differentiating a cardiogenic pleural effusion in an exudative fluid (ex: diuresis)- pleural levels have no added value
• >1,500 picograms/mL suggest CHF