Vascular anomalies are among the most common congenital lesions of the head and neck. While there have been many proposed classification of these lesions, the most commonly accepted system divides these lesions into vascular neoplasms, such as hemangioma and vascular malformations. Recommended treatment modalities have included observation, local excision, embolization, sclerotherapy, cryosurgery, radiotherapy, medical therapy with agents such as interferon and steroids, and laser photocoagulation. In addition, we provide a review of pertinent literature on treatment of such lesions. Brooke Army Medical Center, Fort Sam Houston, Tex.
Few data are available on the effects of industrial respirators on sleep.
It is possible that in certain scenarios, ie, combat using chemical agents, prolonged use of a protective mask may be necessary. It has been shown that wearing a protective mask increases respiratory work by increasing dead space and increasing the resistance against which one must breathe. A logical result of this would be a finding that negative inspiratory pressures would increase while wearing the mask, leading to apneic episodes during sleep. This has not been documented in a clinical study. Each volunteer was studied for 1 night without the mask and for 1 night while wearing the mask.