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pneumothorax occurring without iatrogenic or other trauma; primary spontaneous pneumothorax generally occurs in young people with apical blebs but otherwise normal lungs; secondary spontaneous pneumothorax occurs in people with underlying lung disease, most commonly chronic obstructive pulmonary disease and, less often, interstitial lung disease, pneumonia, lung abscess, and lung tumors.
Farlex Partner Medical Dictionary © Farlex 2012
spontaneous pneumothoraxEmergency medicine A condition affecting ± 17,000/yr–US, which may be idiopathic or 2º to underlying pulmonary disease–eg, COPD, most commonly occurring in previously healthy tall, thin ♂, age 20-40, 2º to rupture of subpleural blebs At-risk Smokers, family Hx of SP, asthma, emphysema, pneumothorax, rapid ascent to high altitude, histiocytosis.
Clinical Abrupt chest pain, with SOB proportionate to the size of the pneumothorax; tension pneumothorax, while rare, may compromise the circulation by a ball-valve mechanism Treatment Suction followed by water seal drainage Prognosis 30% recur on the same side, a tendency that may be ↓ by intrapleural tetracycline; 10% occur de novo on the opposite side
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
spon·ta·ne·ous pneu·mo·thor·ax(spon-tā'nē-ŭs nū'mō-thōr'aks)
Air or gas in the pleural cavity occurring secondary to parenchymal lung disease, usually from an emphysematous bulla that ruptures or occasionally from a lung abscess.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
spontaneous pneumothoraxSudden and unexpected incursion of air into the space between the two layers of the PLEURA so that the underlying lung collapses. The usual cause is rupture of a congenital bleb on the inner pleural layer so that air passes from the lung. In most cases the leak seals itself and the lung soon re-expands.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Air in the chest cavity that occurs because of disease or other naturally occurring cause. Air and blood together in this space is called a pneumohemothorax.
Mentioned in: Chest Drainage Therapy
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.