Mutsuko Hara

Posterior paranasal sinus cysts with opthalmological symptoms.

Thirty-eight cases of posterior paranasal sinus cysts with opthalmological symptoms, treated at Nihon Univcrsity School of Medicine between 1977 and 1987 were reviewed.Location of cysts, predominance of sex and age, existence of pasthistory of sinus operation were the same as reported by many other otolaryngologists.Operation was carried out to drain the cysts. Good results were obtained in the cases of 1) good visual acuity preoperatively 2) operation carried out promptly after the devclopment of eye symptoms and 3) gradual onset of eye symptoms.Drainageoperation was satisfactory in patients with visualacuity of more than 0.01. When the visual acuity is below 0.01, more advanced opcration such as pecling off affected mucosa, decompression of optic nerve is preferable.

SCANNING ELECTRON MICROSCOPIC STUDY OF THE MIDDLE EAR MUCOSA AFTER TRANSTYMPANIC INFUSION OF FLUIDS WITH DIFFERENT OSMOTIC PRESSURE

This study focused on the morphological alteration of the mucous membrane of the middle ear after transtympanic infusion of fluids with different osmotic pressure. Our results suggested that fluids with high osmotic pressure will seriously damage the mucous membrane of the middle ear regardless of whether or not the fluids have ototoxicity. On the other hand, fluids with low osmotic pressure were found to demonstrate minor changes on the mucous membrane. The authors have confirmed through this study that Beriplast-P A (894 mOsm) and B (228 mOsm), fibrinogen-based tissue sealants, may be safely used in the middle ear with minimum injury to the mucous membrane.