Ja Yoon Ku1, Min Kyoung Lee2, Woo Ri Choi3, Jeong Hyun Lee4, Ji Heui Kim5. 1. Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505, Seoul, Republic of Korea. 2. Department of Radiology, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. 3. Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea. 4. Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea. 5. Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, 05505, Seoul, Republic of Korea. jhkim0217@amc.seoul.kr.
Abstract
PURPOSE: To evaluate the success of olfactory training in patients with olfactory loss and olfactory bulb (OB) atrophy detected on magnetic resonance imaging (MRI) and other characteristics. METHODS: This study included 48 patients with olfactory loss who underwent a nasal endoscopic examination and MRI before olfactory training. The Korean Version of the Sniffin' Sticks Test was performed before and after training. The olfactory training success was defined as an improvement of more than 6 points in the Threshold-Discrimination-Identification (TDI) score. Patient characteristics and OB atrophy pre-training were compared between successful and unsuccessful groups. RESULTS: The etiology of olfactory loss included respiratory viral infection in 30 (62.5%), trauma in 10 (20.8%), and idiopathic loss in 8 (16.7%) patients. Twenty-three (47.9%) of 48 patients exhibited successful olfactory training. Etiology, age, gender, and symptom duration were not different between unsuccessful and successful groups. Pre-training discrimination, identification, and TDI scores were significantly different between unsuccessful and successful groups (P < 0.05). Success rate of patients with bilateral OB atrophy was significantly lower than that of patients with unilateral OB atrophy and normal morphology (P = 0.006). OB height was significantly lower in the unsuccessful group than in the successful group (P < 0.05). Bilateral OB atrophy was an independent risk factor for failure of olfactory training according to the multivariate analysis. CONCLUSION: Olfactory loss patients with bilateral OB atrophy may not be able to improve olfactory function after olfactory training.
PURPOSE: To evaluate the success of olfactory training in patients with olfactory loss and olfactory bulb (OB) atrophy detected on magnetic resonance imaging (MRI) and other characteristics. METHODS: This study included 48 patients with olfactory loss who underwent a nasal endoscopic examination and MRI before olfactory training. The Korean Version of the Sniffin' Sticks Test was performed before and after training. The olfactory training success was defined as an improvement of more than 6 points in the Threshold-Discrimination-Identification (TDI) score. Patient characteristics and OB atrophy pre-training were compared between successful and unsuccessful groups. RESULTS: The etiology of olfactory loss included respiratory viral infection in 30 (62.5%), trauma in 10 (20.8%), and idiopathic loss in 8 (16.7%) patients. Twenty-three (47.9%) of 48 patients exhibited successful olfactory training. Etiology, age, gender, and symptom duration were not different between unsuccessful and successful groups. Pre-training discrimination, identification, and TDI scores were significantly different between unsuccessful and successful groups (P < 0.05). Success rate of patients with bilateral OB atrophy was significantly lower than that of patients with unilateral OB atrophy and normal morphology (P = 0.006). OB height was significantly lower in the unsuccessful group than in the successful group (P < 0.05). Bilateral OB atrophy was an independent risk factor for failure of olfactory training according to the multivariate analysis. CONCLUSION: Olfactory loss patients with bilateral OB atrophy may not be able to improve olfactory function after olfactory training.
Authors: T Hummel; K L Whitcroft; P Andrews; A Altundag; C Cinghi; R M Costanzo; M Damm; J Frasnelli; H Gudziol; N Gupta; A Haehne; E Holbrook; S C Hong; D Hornung; K B Hüttenbrink; R Kamel; M Kobayashi; I Konstantinidis; B N Landis; D A Leopold; A Macchi; T Miwa; R Moesges; J Mullol; C A Mueller; G Ottaviano; G C Passali; C Philpott; J M Pinto; V J Ramakrishnan; P Rombaux; Y Roth; R A Schlosser; B Shu; G Soler; P Stjärne; B A Stuck; J Vodicka; A Welge-Luessen Journal: Rhinol Suppl Date: 2017-03
Authors: K Kollndorfer; F Ph S Fischmeister; K Kowalczyk; E Hoche; C A Mueller; S Trattnig; V Schöpf Journal: Neuroimage Clin Date: 2015-09-15 Impact factor: 4.881