PLEURAL DISEASES) (Pleural effusion &...
Transcript of PLEURAL DISEASES) (Pleural effusion &...
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PLEURAL DISEASES
(Pleural effusion & empyema)
Menaldi RasminDepartment of Pulmonology & Respiratory Medicine
Faculty of Medicine, University of Indonesia
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Introduction Pleural effusion is the most common
manifestation of pleural diseases Dyspnea from pleural effusions is related more to
distortion of the diaphragm and chest wall during respiration than to hypoxemia.
Dyspnea also can be caused by underlying intrinsic lung or heart disease, obstructing endobronchial lesions, or diaphragmatic paralysis, especially after coronary artery bypass surgery.
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Pleura•Mesothelial lining of each hemithorax•Derived from embryonic coelomic lining
Visceral pleura: lung
Parietal pleura: wall•Costal•Diaphragmatic•Mediastinal•Cervical
Anatomy of the pleuraAnatomy of the pleura
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Pleural cavityPleural cavity
Potential space between visceral & parietal pleura
Capillary layer of serous fluid produced by mesothelium
Reduces friction
Surface tension provides cohesion between lung and thoracic wall
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Pathophysiology of pleural effusion
The normal pleural space contains approximately 1 mL of fluid, representing the balance of hydrostatic and oncotic forces in the visceral and parietal pleural vessels and lymphatic drainage. Pleural effusions result from disruption of this balance
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Diagram representing pressures involved in formation and absorption of pleural fluid.
Modified from Fraser RG et al: Diagnosis of diseases of the chest, ed 3, Philadelphia, 1988, WB Saunders.
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Schema showing normal pleural liquid turnover. The initial microvascular filtrate in the parietal and visceral pleura is partly reabsorbed (dashed arrows). The
remaining low-protein interstitial liquid flows across the leaky pleural mesothelial layers into the pleural space. The pleural liquid exits the pleural space via the
parietal pleural lymphatic stomata
Staub NC, Wiener-Kronish JP, Albertine KH: Transport through the pleura: Physiology of normal liquid and solute exchange in the pleural space. In Chretien J, Bignon J, Hirsch A [eds]: The Pleura in Health and Disease. New York: Marcel Dekker, 1985, p 182
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Pleural effusion classification
Transudate Exudate
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Pleural fluid analysis Pleural fluid is considered an exudate if one or more of the
following hold true: Pleural fluid protein divided by serum protein is greater than 0.5. Pleural fluid LDH divided by serum LDH is greater than 0.6. Pleural fluid LDH is greater than two-thirds the upper limit of
normal for the serum LDH.
If none of these criteria is met, the patient has a transudative pleural effusion
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Etiology Transudate :
congestive heart failure, cirrhosis with ascites, nephrotic syndrome, hypoalbuminemia, myxedema, peritoneal dialysis, glomerulonephritis, superior vena cava obstruction, pulmonary embolism
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Exudates : Infections : pneumonia, tuberculosis, lung abscess, viral
illness Malignancy : lung cancer, mesothelioma,
pulmonary/pleural metastases, lymphoma Connective tissue disaese : rhematoid arthritis, SLE Abdominal disorders : pacreatitis, esophageal rupture,
subphrenic abscess Others: pulmonary embolism, uremia, postpartum, drug
reaction, chylothorax
Etiology
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History (anamnesis) Dyspnea Cough :
Mild, nonproductive cough or chest pain More severe cough or production of purulent or
bloody sputum suggests an underlying pneumonia or endobronchial lesion
Constant chest wall pain might reflect chest wall invasion by bronchogenic carcinoma or malignant mesothelioma.
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History (anamnesis)
Pleuritic chest pain suggests either pulmonary embolism or an inflammatory pleural process
Systemic toxicity evidenced by fever, weight loss, and inanition suggests empyema
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Physical findings Physical findings do not usually manifest
until pleural effusions exceed 300 mL Dullness on chest percussion Decreased tactile fremitus Egophony Decreased breath sound in chest
asucultation
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Diagnostic tools
Chest imaging : X rays : PA, lateral, lateral decubitus Thoracic ultrasound CT scanning
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Diagnostic tools Observing the quality of the fluid obtained
during thoracentesis Frankly purulent fluid indicates an empyema. A putrid odor suggests an anaerobic empyema. A milky, opalescent fluid suggests a chylothorax,
resulting most often from lymphatic obstruction by malignancy or thoracic duct injury by trauma or surgical procedures.
Grossly bloody fluid indicates the need for a spun hematocrit test of the sample. A pleural fluid hematocrit level of more than 50% of the peripheral hematocrit level defines a hemothorax
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Diagnostic tools Diagnostic thoracentesis :
Distingushing exudates from transudates by pleural fluid analysis (as described above) or using Light’s criteria
pH of pleural fluid Cytologic examination of pleural fluid Closed needle pleural biopsy – histologic
examination Tumor markers
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Diagnostic tools Measure pleural fluid amylase if a pancreatic origin or
ruptured esophagus is suspected or if a unilateral left pleural effusion remains undiagnosed after initial testing. Additional assay of amylase isoenzymes can distinguish a pancreatic source from other etiologies
Measure triglycerides on milky pleural fluids when chylothorax is suspected
Consider immunologic studies, including pleural fluid antinuclear antibody and rheumatoid factor, when collagen vascular diseases are suspected
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Diagnostic tools Consider bronchoscopy if needed
In tuberculous pleural effusion, acid fast bacilli staining is rarely diagnostic (<10%) & pleural fluid cultures grow Mycobacterium tuberculosis in less than 65% of cases because most of this effusion are due to inflammatory reaction
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Note Despite primary evaluation with serial
thoracenteses with cytology and pleural biopsy, approximately 25% of exudative effusions remain undiagnosed.
Consider pulmonary embolism in such patients and order radionuclide perfusion lung scanning if reasonable clinical suspicion exists
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Management Treat the etiology Therapeutic thoracentesis Tube thoracostomy Pleurodesis or pleural sclerosis Surgery as indicated and/or VATS Diet (chylothorax)
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Case Female, 70 years old Dyspnea since 1 mo before admission,
chest pain, cough (-), fever (-) Weight loss (-) History of antituberculosis drugs therapy for
1 mo but no improvement History of pleural tapping 2x @ 500 – 100
cc serohemorrhagic
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Physical examination Moderate illness, compos mentis BP 100/80, HR 92x/m, RR 24x/m No lymph nodes enlargement Heart : S1-2 regular, murmur (-), gallop (-) Lung : asimetric, there was less movement on the
left lung, dull / sonor, tactile fremitus on left lung was diminished, diminished vesicular / vesicular, ronchi - / -, wheezing -/-
Abdomen : no abnormalities were found Extremities : no clubbing fingers
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3 Nov 2004
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Laboratory findings31 Oct 2004
Hb 10.0 Leucocytes 7900 Platelets 219000 Blood sugar 81
1 November 2004
Albumin 2.8 Total bilirubin 0.2 Indirect bil 0.11 Direct bil 0.09 SGOT/PT 14 / 9 Ureum/creat 23 / 1.1
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Cytology examination of pleural fluid
Adenocarcinoma
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Other examinations Gynecologic evaluation : no suspicion of
tumor Digestive tract examination : no suspicion
of tumor Other diagnostic plans : abdominal
ultrasound, tumor marker (CEA, AFP)
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Diagnosis
WD/ Right lung cancer T4N?M? adenocarcinoma stg min IIIB PS 70-80
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Management
Water sealed drainage for pleural fluid evaculation
Pleurodesis with doxycycline 500 mg Analgetic Chemotherapy
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