Effectiveness of chest tube evacuation ofpneumothorax in neonates

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This is a retrospective review of the effectiveness of 149 chest tubes placed in attempts to evacuate 91 pneumothoraces among 57 infants. Forty-four percent of initial evacuation attempts were ineffective; 42% of total chest tubes throughout the clinical courses were ineffective. The largest number of these ineffective chest tubes lay posterior in the pleural cavity. Fifty-six percent of posterior tubes were ineffective whereas only 4% of anterior tubes were ineffective. Other causes for failure included tubes which had perforated the lung, diaphragm, or mediastinum or were lying subcutaneously. On some occasions, chest tubes were mistakenly used to evacuate intrathoracic air which was actually a pulmonary pseudocyst or pneumomediastinum. Two thoracostomy sites were chosen: the superior and lateral. Eighty-five percent of chest tubes inserted through the superior approach lay anteriorly in the pleural cavity whereas only 47% of the laterally inserted tubes lay anteriorly. Superior thoracostomy tubes were significantly more effective than lateral tubes because of their more frequent anterior location. There were also fewer complications with superior thoracostomy tubes. Whereas only 10% of superiorly inserted tubes encroached upon the mediastinum, 32% of lateral tubes did so. To be effective, chest tubes should be placed anteriorly in the pleural space; this location is more often achieved via the superior thoracostomy approach.