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메타콜린 상부기도과민성과 상부기도폐쇄의 원인에 관한 연구
김영일 ( Young Il Kim ),최인선 ( Inseon S. Choi ),박동진 ( Dong Jin Park ),김연주 ( Yeon Joo Kim ),조대호 ( Dae Ho Cho ),지수영 ( Soo Yeong Jee ),최준석 ( Joon Seok Choi ),한의령 ( Eui Ryoung Han ) 대한천식알레르기학회 2010 천식 및 알레르기 Vol.30 No.1
Background: Many patients with asthma-like symptoms show upper airway hyperresponsiveness (UHR). However, few investigators have studied the etiologies of UHR. Objective: To investigate the etiologies of UHR. Method: During methacholine bronchoprovocation tests, acceptable inspiratory flow volume curves were obtained. UHR was defined as methacholine concentration causing a 25% fall in maximal mid-inspiratory flow (PC25MIF50) <25 mg/mL and upper airway obstruction (UAO) as maximal mid-expiratory/inspiratory flow ratio >1.0. Result: The PC25MIF50 was significantly related to bronchial hyperresponsiveness index (r=0.68, P<0.001), blood eosinophil counts (r=-0.31, P<0.01) and serum total IgE level (r=-0.24, P<0.05). More than half of the patients with UHR/UAO had concurrent allergic rhinitis and the abnormality in paranasal sinus X-rays. Sixty-six (64.1%) of the 103 patients with UHR or UAO were female. The prevalence of smoking, blood eosinophilia, increased IgE levels and positive skin tests was significantly lower in women than in men. Women were significantly older than men (P<0.01) and had a higher prevalence of UAO (P<0.05). Conclusion: UHR or UAO seems to be most closely associated with allergy and bronchial hyperresponsiveness. However, women had a higher prevalence of UAO which may be related to non-allergic factors such as a smaller airway caliber. (Korean J Asthma Allergy Clin Immunol 2010;30:21-29)