Clinics in chest medicine
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Although tracheostomy is performed most commonly for ventilator-dependent patients who have had prolonged periods of endotracheal intubation, it is still necessary and used for other airway problems. Patient management as it relates to indications, timing, various surgical techniques, types of tubes, and complications of tracheostomy and other forms of airway maintenance and control are discussed and evaluated.
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Complications of tracheotomy are largely preventable. Although some authors cite these complications as indications for prolonged endotracheal intubation to avoid tracheotomy, others believe that the laryngotracheal complications of prolonged endotracheal intubation warrant early tracheotomy. Obviously, unnecessary tracheotomies should not be performed, and the controversy regarding the timing of conversion of endotracheal intubation to tracheotomy is handled in an earlier article in this issue. ⋯ These patients are best managed conservatively until they are able to be weaned from a ventilator. A single-stage repair of both the esophagus and the trachea should then be done. Tracheoinnominate artery fistula can be avoided by correct placement of the tracheostomy stoma through the second and third tracheal rings rather than lower in the trachea and by avoidance of overinflation of tracheostomy tube cuffs.
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All critical care physicians should be adept at medical management of the airway, including basic and advanced life support measures. Proper head and neck positioning, use of non-definitive airways, and ability to oxygenate and ventilate the patient with bag-valve-mask should be part of the armamentarium of every critical care physician. ⋯ Oral intubation is preferred for emergency establishment of a definitive airway in most situations. Skillful intubation technique and meticulous daily management of the upper airway should diminish the risk of complications of translaryngeal intubation.
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The human larynx is complex and serves multiple functions. Unfortunately, endotracheal tubes do not reproduce all these functions. They serve well as air passages but cannot do so without damaging the mucosa of the posterior larynx. ⋯ It is hoped that this reduction in complications will carry over into the chronic care setting as such monitoring becomes the standard after intubations. Compared with malposition of the tube, most of the other complications of intubation are minor. However, knowledge of the various complications can ensure avoidance of many and early detection and correction of others.
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Double-lumen endotracheal tubes have revolutionized the anesthetic management of patients undergoing thoracic surgery. As experience with the techniques of DLT placement and monitoring progress, an increasing number of uses in the intensive care unit will evolve. ⋯ Isolation of the lungs to prevent contralateral spread of hemoptysis is occasionally of assistance. Frequent monitoring of DLT position while understanding the physiology of differential lung ventilation will minimize complications with these tubes.