Intrathoracic trachéal obstruction from an anterior me diastinal mass presents a complex and potentially lethal problem in managing the airway and providing adequate tissue oxygénation. Descriptions of the management and complications of adults with mediastinal masses causing extrinsic tracheobronchial compression are rare in the otolaryngologic literature. We present our multidisciplinary approach to a patient with a large anterior mediastinal mass and an unstable airway and review the management principles for patients with extrinsic trachea! compression.
CASE REPORTA 33-year-old woman was transferred to the Eye and Ear Hospital of Pittsburgh by helicopter for emergency airway management. A gradually enlarging mass in the neck had been present approximately 2 months. The review of systems was remarkable for orthopnea, progressive dysphagia, dys pnea, and tachypnea, which were exacerbated when the woman was supine. Her dyspnea and hoarseness had wors ened in the past few days.Physical examination revealed a large firm mass in the anterior neck, filling the suprastemal fossa, extending supe riorly 4 cm. Hemoglobin saturation by pulse oximetry was 93% while breathing 40% oxygen by face mask. There was tachypnea to a rate of 36 and the patient reported increasing respiratory fatigue. The lungs were clear, with bilaterally 484 decreased breath sounds, and the remainder of the physical examination was normal.Computed tomography obtained at the initial presentation ( Fig. 1) showed a large anterior mediastinal mass extending into the neck. The inferior limit of the lesion was 3 cm superior to the carina. The trachéal lumen was narrowed in the an terior/posterior dimension. At the point of maximum nar rowing, the anterior wall touched the posterior wall, creating 3-mm and 4-mm airway channels; one on each side of the trachea. There was definite compression of the trachea by tumor; however, invasion through the trachea! wall and pen etration into the lumen could not be excluded at the point of maximum narrowing.In view of the patient's impending respiratory collapse, the decision was made to stabilize the airway. It was believed the site of the lesion made conventional endotracheal intu bation difficult, and placed the patient at high risk for com plete obstruction should it fail. It was decided the airway would be secured with the ventilating bronchoscope and tracheostomy and biopsy performed.Before endoscopy, under local anesthesia, the patient's right femoral artery and vein were isolated and prepared for extracorporal membrane oxygénation. With the groin vessels exposed and cannulae prepared, the patient was given general anesthesia by rapid sequence induction. The rigid ventilating bronchoscope was passed beyond the area of compression and the patient was easily ventilated. There was no evidence of erosion or extension of tumor into the trachéal lumen.A tracheostomy was performed over the bronchoscope and the tracheostomy tube was passed beyond the area of compres sion. At operation, a large firm tumor was found ex...