Olfactory Function Test—Present Status and Future Prospects—

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  • 嗅覚検査の現状と展望
  • キュウカク ケンサ ノ ゲンジョウ ト テンボウ

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Abstract

Smell dysfunction is a common complaint among patients presenting to ENT clinics. Patients with a smell disorder are evaluated by detailed interview, physical examination using a nasal endoscope, CT imaging and olfactory function tests. Olfactory function tests include psychophysical measurements and objective tests using measurements of brain activity, but the latter is less established in routine clinical practice. T&T olfactometry is a standard olfactory function test in Japan. Although its good point is that it can evaluate both thresholds and identification ability of the patients, it is not conducted at clinics because of the associated complicated procedure and bad smell. Accordingly some techniques to evaluate the patient’s olfactory function are shown herein, a self-administered odor questionnaire, visual analog scale, and newly developed olfactory identification tests for Japanese subjects. The newly developed procedures, measurement of olfactory bulb volume with MRI and olfacto-scintigraphy using SPECT-MRI as objective tests are presented.

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