Abstract
Narrow Band Imaging (NBI) is a light source device developed by Olympus Medical Systems Corporation. It provides an optical highlighting technique whereby the capillaries and fine structures of the superficial mucosal layer are highlighted by confining the light supplied from the light source to specific wavelengths (415 nm and 540 nm) readily absorbed by hemoglobin in blood, unlike endoscopy with a conventional light source. This technique has been applied to differential diagnosis of malignant tumors of the gastrointestinal tract and its efficacy has been documented in an increasing number of reports. The present series was investigated by NBI for blood circulation reconstruction after surgery for chronic otitis media. The results showed that tympanic blood circulation underwent reconstruction progressing from the posterosuperior margin downward, beginning 2 weeks after the procedure.
