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임상연구 : 성상신경절 차단이 돌발성 난청의 치료에 미치는 영향
송종욱 ( Jong Wook Song ),심재광 ( Jae Kwang Shim ),문진천 ( Jin Cheon Moon ),안은경 ( Eun Kyoung Ahn ),금창만 ( Chang Man Kum ),윤덕미 ( Duck Mi Yoon ),이원상 ( Won Sang Lee ),신증수 ( Cheung Soo Shin ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.1
Background: Idiopathic sudden sensorineural hearing loss (ISSNHL) is defined as a sensorineural hearing loss which develops abruptly without definitive causes. Stellate ganglion block (SGB) has been used as one of the treatment modalities in ISSNHL. However, published data establishing the effect of SGB has been slim. We conducted this study to evaluate the effect of SGB according to the factors that may influence the prognosis of the disease. Methods: We reviewed the records of 343 patients. The control group was managed with medications, and the SGB group was managed with SGB and the same medications. SGB was performed with 5 ml of 1.0% mepivacaine. The pure-tone audiogram was performed after the therapy and Siegel`s criteria was used to define the recovery of hearing. Results: The recovery rate of the SGB group was higher than that of the control group (58.1% vs. 42.1%, P < 0.05). The SGB group had a higher recovery rate than the control group in patients treated within 7 days from the onset of symptoms (66.9% vs. 44.1%, P < 0.05), without diabetes mellitus (58.5% vs. 44.9%, P < 0.05), without dizziness (61.6% vs. 44.6%, P < 0.05), or whose initial hearing loss was between 71 and 90 dB (69.4% vs. 38.9%, P < 0.05). Conclusions: SGB is thought to be a useful therapy for ISSNHL, especially in the patients treated within 7 days, without diabetes mellitus, dizziness, or whose initial hearing loss was severe. (Korean J Anesthesiol 2006; 51: 52~7)
신윤혁(Yoonhyuk Shin),심승규(Seungkyu Sim),송종욱(Jongwook Song),김철민(Chulmin Kim),임동현(Donghyun Lim),김성철(Sung Chul Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
In this study controller integrated heater modules using high voltage power were made for electric vehicles. The heat core and controller for the heater module were designed to improve the heater power density. We also investigated the performance characteristic(heating capacity, energy efficiency, pressure drop) of heater modules through the experiments. Therefore, the experimental results indicated that prototype of heater module had satisfactory performance. This study will contribute to developing the heating system for electric vehicle.