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정상인에서의 지방족 알코올의 탄소수 변화에 따른 후각역치 및 삼차신경역치의 변화
양경헌,허남호,김태형,최승호,권용식,송성호,김점근 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.5
Background and Objectives:Using n-aliphatic alcohols whose physical properties change gradually as their length increases, we investigated the changes of olfactory threshold and trigeminal pungency threshold with the increase of carbon chain Materials and Method:Olfactory and trigeminal pungency thresholds were measured in ethanol (C2), 1-butanol (C4), 1-hexanol (C6) and 1-octanol (C8) in 40 normal adults using a two-alternative forced-choice modified by the ascending method of limit (CCCRC) test. Plastic bottles with 30 ml of four n-aliphatic alcohols were diluted threfold sucesively by Results:The olfactory and trigeminal pungency thresholds decreased and the ratio of olfactory threshold/trigeminal pungency threshold increased with the length of carbon chain in n-aliphatic alcohols. The correlation coefficients among olfactory thresholds in each alcohol were higher than those among trigeminal pungency thresholds. Conclusion:Alcohol with long carbon chains showed low olfactory and trigeminal pungency thresholds, indicating that high lipid solubility is an important factor in olfaction and trigeminal chemosensitivity. (Korean J Otolaryngol 2002;45:483-7)
안병준,양경헌 東國大學校 1999 東國論叢 Vol.38 No.-
Despite more than 150 years of measurement, it is difficult to evaluate a olfactory threshold in patients with decreased sense of small, as it can be changed by many variables manipulated in the study of olfactory thresholds. Especially to measure the level of smell loss in patients caused by traffic accidents or head trauma is very important in the point of evaluating the amount of permanent disability. Olfactory threshold of 14 patients(11 males and 3 females) with decreased sense of smll caused by traffic accident(8 cases) or falling down injury(6 cases) were evaluated by combined use of bounded three-alternative forced-choice modified ascending method of limit(CCCRC test) and step method using 1-butanol as a testing solution. Olfactory threshold of patients was 1.54±1.4 step, which was much lower than the level of normals statistically significantly(p<0.0001). Olfactory identification test entailed naming of 43 natural odors familiar to Koreans. The percent-correct obtained(olfactory identification score) showed 35.0±18% in patients, which is much lower than normals with statistical significance(p<0.0001). In conclusion, these olfactory threshold and identification tests can be used in the level measurement of patients with decreased sense of smell with accuracy.
민양기,양경헌,김익태,박영민 대한비과학회 1997 Journal of rhinology Vol.4 No.1
The high variability of measured olfactory thresholds in humans reflects very broad range of sensitivity within and amongindividuals. This can be derived from the strongly compressive nature of olfaction, which makes it relatively hard to comparethe size of two stimuli in odor sensation. However, we know that some portion of the variation is the result of extrinsic factorse.g. the method used to measure the olfactory threshold. For this reason, in order to address the bias and reliability of a psycophysicalmethod, we combined the use of the CCCRC (Connecticut Chemosensory Clinical Research Center) test with thestep method in 40 normal Korean adults twice a week for the evaluation of threshold. The measured thresholds showed hightest-retest reliability and the threshold estimates remained consistent during the testing without trial-biases. Based on the results,we can conclude that a combined test using the CCCRC test and step method can be used in the measurement of olfactorythreshold in a clinical context.