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Pleural diseases: Case Studies
Dr. JM Nel Department of Pulmonology
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Pleural effusions Case Presentation 1: 68 year old lady
Known with hypertension Presents with dyspnae Pleural effusion clinically WHAT SPECIAL INVESTIGATION NEXT ?
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Pleural effusions CXR Curved shadow at lung base (meniscus)
Blunting of costophrenic angle
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Pleural effusions WHAT NOW ??? Pleural tap Transudate Exudate
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Pleural effusions Pleural fluid features A. Appearance of fluid
B. Biochemical analysis C. Gram stain D. Predominant cells in fluid E. Other
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Pleural effusion: Investigations
LIGHT’S CRITERIA Pleural fluid is an exudate if one or more of criteria is met: Pleural fluid protein: Serum protein ratio > 0.5 Pleural fluid LDH: Serum LDH ratio > 0.6 Pleural fluid LDH > 2/3 upper limit of normal s- LDH
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Pleural effusions Pleural fluid biochemistry: Serum biochemistry:
Protein: 20 Albumin: 10 LDH: 100 Serum biochemistry: Protein: 60 (60-80G/L) Albumin: 18 (35-52G/L) LDH: 200 ( U/L)
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Pleural effusions TRANSUDATE
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Pleural effusion: Causes
Transudate Increased hydrostatic pressure Congestive heart failure Decreased plasma oncotic pressure Nephrotic syndrome Cirrhosis Movement of transudative ascitic fluid through diaphragm
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Pleural effusions Case Presentation 2: 32 year old man
Presents with fever, pleuritic chest pain and dyspnae Pleural effusion clinically WHAT SPECIAL INVESTIGATION NEXT ?
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Pleural effusions CXR Curved shadow at lung base (meniscus)
Blunting of costophrenic angle
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Pleural effusions WHAT NOW ??? Pleural tap Transudate Exudate
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Pleural effusion: Investigations
LIGHT’S CRITERIA Pleural fluid is an exudate if one or more of criteria is met: Pleural fluid protein: Serum protein ratio > 0.5 Pleural fluid LDH: Serum LDH ratio > 0.6 Pleural fluid LDH > 2/3 upper limit of normal s- LDH
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Pleural effusions Pleural fluid biochemistry: Serum biochemistry:
Protein: 60 Albumin: 20 LDH: 150 Serum biochemistry: Protein: 80 (60-80G/L) Albumin: 30 (35-52G/L) LDH: 180 ( U/L)
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Pleural effusions EXUDATE
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Pleural effusion: Causes
Exudate Inflammatory Infection TB/ Pneumonia Pulmonary embolus/ infarction Connective tissue disease RA/ SLE Adjacent to subdiaphragmatic disease Pancreatitis/ Subphrenic abscess Malignancies
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Pleural effusions Pleural fluid biochemistry: Serum biochemistry:
Protein: 60 Albumin: 20 LDH: 150 Glucose: 1.8 pH: 7.0 Serum biochemistry: Protein: 80 (60-80G/L) Albumin: 30 (35-52G/L) LDH: 180 ( U/L)
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Pleural effusions EMPYEMA
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Empyema: Investigations
Aspiration of pus Confirmation of empyema 1. Appearance of fluid: pus 2. Neutrophils 3. Positive gram stain 4. Low pH < 7.2 5. Low glucose < 3.3
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Pleural effusion: Investigations
E. Other Low pH Infection/ Empyema RA/ SLE Malignancy TB Ruptured oesophagus Low glucose As low pH High ADA
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Pulmonary Embolism: Case Studies
Dr. JM Nel Department of Pulmonology
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Pulmonary embolism Case Presentation 1: 64 year old male
Previous hip surgery 20 days ago Sudden dyspnae Pleuritic chest pain Hypoxic Clinically DVT
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Pulmonary embolism DIFFERENTIAL DIAGNOSIS Pulmonary embolism Pneumonia
Pneumothorax Musculoskeletal chest pain
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Pulmonary embolism ASK 3 QUESTIONS
Is the presentation consistent with PE ? Does the patient have risk factors for PE ? Is there another diagnosis that can explain the patients presentation ?
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Pulmonary embolism WHAT NOW ???
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Pulmonary embolism CXR High index of suspicion if normal CXR
Exclude differential diagnoses Heart failure Pneumonia Pneumothorax High index of suspicion if normal CXR Acute dyspnoeac and hypoxaemic patient
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Pulmonary embolism ECG Most common
Exclude other differential diagnoses Acute myocardial infarction Pericarditis Most common Sinus tachycardia
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Pulmonary embolism Arterial bloodgas Low PaO2
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Pulmonary embolism D- dimer POSITIVE Other causes for elevation
Myocardial infarction Pneumonia Sepsis
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Pulmonary embolism Heartsonar NORMAL Massive PE Alternative diagnoses
Acute dilatation of the right heart Pulmonary hypertension Thrombus can be seen Alternative diagnoses Left ventricular failure Aortic dissection Pericardial tamponade
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Pulmonary embolism Duplex doppler of legs DVT in leg
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Pulmonary embolism V/Q scan PULMONARY EMBOLISM
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Pulmonary embolism: Management
General measures Oxygen for all hyoxaemic patients Keep arterial oxygen saturation > 90% Anticoagulation Clexane 80mg bd sc Give at least 5 days Warfarin Stop Clexane when INR is > 2
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Pulmonary embolism: Management
HOW LONG DO I TREAT THIS PATIENT WITH WARFARIN ??? 3 Months Duration of Warfarin therapy If underlying prothrombotic risk or previous emboli For life If identifiable and reversible risk factor 3 Months If idiopathic 6 Months
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Pulmonary embolism Case Presentation 2: 28 year old lady
Oral contraceptives 10 hour flight Sudden dyspnae BP 90/40 Loud P2/ Increased JVP Hypoxic
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Pulmonary embolism DIFFERENTIAL DIAGNOSIS Massive pulmonary embolism
Myocardial infarction Pericardial tamponade Aortic dissection
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Pulmonary embolism ASK 3 QUESTIONS
Is the presentation consistent with PE ? Does the patient have risk factors for PE ? Is there another diagnosis that can explain the patients presentation ?
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Pulmonary embolism CXR NORMAL
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Pulmonary embolism ECG Arterial bloodgas D- dimer S1 Q3 T3 RBBB
Low PaO2 D- dimer POSITIVE
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Pulmonary embolism Heartsonar Right ventricular dilatation
Increased pulmonary pressure
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Pulmonary embolism CT pulmonary angiography MASSIVE PULMONARY EMBOLISM
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Pulmonary embolism: Management
General measures Oxygen for all hypoxaemic patients Keep arterial oxygen saturation > 90% Treat hypotension with IVI fluids Thrombolytic therapy RV dilatation Low BP
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Pulmonary embolism: Management
Complications of thrombolytic therapy Intracranial haemorrhage Haemorrhage at other sites Anaphylaxis
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Pulmonary embolism Case Presentation 3: 28 year old lady
Oral contraceptives 10 hour flight Sudden dyspnae BP 130/80 Loud P2/ Increased JVP Hypoxic
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Pulmonary embolism CXR NORMAL
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Pulmonary embolism ECG Arterial bloodgas D- dimer S1 Q3 T3 RBBB
Low PaO2 D- dimer POSITIVE
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Pulmonary embolism Heartsonar Right ventricular dilatation
Increased pulmonary pressure
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Pulmonary embolism CT pulmonary angiography PULMONARY EMBOLISM
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Pulmonary embolism Patient has normal BP Patient has RV strain
SUBMASSIVE PULMONARY EMBOLISM
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Confirmed PE ECHO RV dysfunction NO YES Hemodynamically Stable ?
Low risk Non-massive PE NO YES Massive PE Anticoagulate Submassive PE UFH LMWH Thrombolysis if no contra-indication Anticoagulate 50
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Submassive PE To thrombolise or not to thrombolise
THAT REMAINS THE QUESTION !!! 51
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Thrombolytic therapy No reduction in mortality !!!
Associated with rapid resolution of radiographic abnormality No reduction in mortality !!! 52
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Thrombolytic therapy Indicated only in hemodynamically unstable patients !!! SBP < 90mmHg All must be followed by therapeutic anticoagulation 53
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