Symptoms and Signs – Differential Diagnosis of Dyspnea
• Upper airway obstruction: trauma, neoplasm, epiglottitis, laryngeal edema, tongue retraction, laryngospasm, abductor paralysis of vocal cords, aspiration of foreign body • Thyrotoxicosis, myxedema • Space-occupying lesions: neoplasm, large hiatal hernia, pleural effusions • Sepsis • Pulmonary vascular congestion • Pulmonary infection: pneumonia, abscess, empyema, TB, bronchiectasis • Pulmonary hypertension • Pulmonary embolism/infarction • Psychoneurosis • Pregnancy • Pneumothorax, hemothorax, pleural effusion • Pneumoconioses: silicosis, berylliosis, others • Parenchymal lung disease • Neurologic dysfunction: Guillain-Barré syndrome, botulism, polio, spinal cord injury • Metabolic abnormalities: uremia, hepatic coma, diabetic ketoacidosis (DKA) • Mesothelioma • Lung resection • Lower airway obstruction: neoplasm, chronic obstructive pulmonary disease (COPD), asthma, aspiration of foreign body • Interstitial pulmonary disease: sarcoidosis, collagen-vascular diseases, desquamative interstitial pneumonia (DIP), Hamman- Rich pneumonitis, others • Inhalation of toxins • Hematologic: anemia, polycythemia, hemoglobinopathies • Disease of chest wall: severe kyphoscoliosis, fractured ribs, sternal compression, morbid obesity • Diaphragmatic paralysis • Diaphragmatic compression caused by abdominal distention, subphrenic abscess, ascites • Cholinergic drug intoxication • Cardiac disease: arteriosclerotic heart disease (ASHD), valvular lesions, cardiac dysrhythmias, cardiomyopathy, pericardial effusion, cardiac shunts • Carcinoid syndrome • Atelectasis
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