A multiple submucosal out-fracture of the inferior turbinates was made in 21 patients with nasal obstruction due to hypertrophy of the inferior turbinates. Before surgery, an endoscopic evaluation and an acoustic rhinometry was performed in all the cases. The operation was done under general anesthesia and bilaterally in all the patients. Three months after surgery, a postoperative acoustic rhinometry was done and an increase of the minimal cross-section area was achieved in all the cases. Acoustic rhinometry performed in 100 normal cases was used as a control group.
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