Abstract
Plain radiology is the standard means of assessing upper airway obstruction in patients with goiters. Flow volume loop curves will provide additional information, because they allow a quantitative assessment of airflow dynamics in the respiratory cycle. Fifty-one patients had flow volume loops performed before and after thyroidectomy. There was a significant increase in the maximum inspiratory flow rate (3.9 +/- 0.2 versus 4.9 +/- 0.2 L/second, p less than 0.01) after thyroidectomy. Eight of twelve patients with normal tracheal radiology had improved airflow dynamics in the postoperative period. The flow volume loop curve is a simple noninvasive means of assessing airflow dynamics in patients with goiters and may be superior to conventional radiology.
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