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HRCT¸¦ ÀÌ¿ëÇÑ Ãµ½ÄÀÇ ÁßÁõµµ¿¡ µû¸¥ ±âµµ°³ÇüÀÇ Æò°¡ High resolution computed tomographic assessment of airway remodeling: comparison according to the severity of asthma

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ÀÓ¼º¿ë ( Lim Seong-Yong ) 
¼º±Õ°ü´ëÇб³ ÀÇ°ú´ëÇÐ °­ºÏ»ï¼ºº´¿ø

±è¾ç¼ö ( Kim Yang-Soo ) 
Áß¾Ó´ëÇб³ ÀÇ°ú´ëÇÐ ¹æ»ç¼±°úÇб³½Ç
ÃÖº´ÈÖ ( Choi Byoung-Whui ) 
Áß¾Ó´ëÇб³ ÀÇ°ú´ëÇÐ ³»°úÇб³½Ç

Abstract

¸ñÀû : ±âµµ °³ÇüÀº õ½ÄÀÇ Æ¯Â¡À¸·Î ÃÖ±Ù HRCT°¡ ±âµµº®ÀÇ ºñÈÄ¿Í °°Àº ±âµµ °³ÇüÀÇ Æò°¡¿¡ À¯¿ëÇÑ °ÍÀ¸·Î ¾Ë·ÁÁö°í ÀÖ´Ù. ±âµµº®ÀÇ ºñÈĴ õ½ÄÀÇ ÁßÁõµµ¿Í ¿¬°üÀÌ ÀÖ´Ù°í ¾Ë·ÁÁö°í ÀÖÁö¸¸ ±¹³» ¿¬±¸´Â µå¹® »óÅÂÀÌ´Ù. º» ¿¬±¸´Â ¼ºÀΠõ½Ä ȯÀÚ¿¡¼­ ÁßÁõµµ¿¡ µû¸¥ ±âµµº®ÀÇ ºñÈĵµ Â÷À̸¦ ºñ±³ÇÏ°í ÀÌ¿Í Æó±â´É ¹× ±â°üÁö °ú¹Î¼º°úÀÇ »ó°ü°ü°è¸¦ »ìÆ캸°íÀÚ ÇÏ¿´´Ù.

¹æ¹ý : 37¸íÀÇ ¼ºÀΠõ½Ä ȯÀÚ(°æÁõ õ½Ä 17¸í, ÁßµîÁõ õ½Ä 11¸í, ÁßÁõ õ½Ä 9¸í) ¸¦ ´ë»óÀ¸·Î HRCT¸¦ ½ÃÇàÇÏ¿© ±âµµº®ÀÇ µÎ²²(T), ±âµµ ³»°æ(d)¸¦ ÃøÁ¤ÇÑ ÈÄ, ±âµµ ¿Ü°æ(D)À» °è»êÇÏ¿© ±¸ÇÑ T/D ºñ¸¦ ±âµµº®ÀÇ ºñÈĵµ ÁöÇ¥·Î ÀÌ¿ëÇÏ¿© °¢ ±º »çÀÌÀÇ Â÷À̸¦ »ìÆ캸°í Æó±â´É ¹× ±â°üÁö °ú¹Î¼º°úÀÇ »ó°ü°ü°è¸¦ »ìÆ캸¾Ò´Ù.

°á°ú : ±âµµº®ÀÇ ºñÈĵµ(T/D ºñ)´Â ÁßµîÁõ°ú ÁßÁõ õ½Ä±º¿¡¼­ °æÁõ õ½Ä±ºº¸´Ù Àüü ±âµµ¿¡¼­ Å©°Ô ³ªÅ¸³µ´Ù (0.278¡¾0.014, 0.281¡¾0.019 vs. 0.228¡¾0.013; °¢°¢ p=0.022, p=0.021). ¼Ò±âµµ¿¡¼­µµ ±âµµº®ÀÇ ºñÈĵµ´Â ÁßÁõ õ½Ä±º¿¡¼­ °æÁõ õ½Ä±ºº¸´Ù ÄÇ´Ù(0.313¡¾0.018 vs. 0.253¡¾ 0.013; p=0.009). ´ë±âµµ¿¡¼­´Â ¼¼±º°£¿¡ ºñÈĵµ Â÷ÀÌ°¡ ¾ø¾ú´Ù. ±âµµº®ÀÇ ºñÈĵµ´Â Æó±â´É »óÀÇ FEV1 Àý´ë°ª ¹× % ¿¹ÃøÄ¡¿Í Àüü ±âµµ(r=-0.519, p=0.001; r=-0.396, p= 0.015), ¼Ò±âµµ(r=-0.567, p<0.001; r=-0.450, p=0.008) ¹×
´ë±âµµ(r=-0.395, p=0.015; r=-0.351, p=0.033)¿¡¼­ À¯ÀÇÇÑ ¿ª»ó°ü°ü°è¸¦ º¸¿´´Ù. ±âµµº®ÀÇ ºñÈĵµ¿Í ±â°üÁö °ú¹Î¼º°ú´Â »ó°ü°ü°è¸¦ º¸ÀÌÁö ¾Ê¾Ò´Ù.

°á·Ð : ±âµµº®ÀÇ ºñÈÄ´Â °æÁõ õ½Äº¸´Ù ÁßµîÁõ°ú ÁßÁõõ½Ä¿¡¼­ ½ÉÇØÁö°í ±âµµº®ÀÇ ºñÈĵµ°¡ Ŭ¼ö·Ï ±âµµ Æó¼â
°¡ ½ÉÇØÁø´Ù

Background : Airway remodeling is characterized by an increase in the airway wall thickness. We aimed to compare the airway wall thickness among asthmatic subjects with different severity and to examine its relation to pulmonary function and airway hyperresponsiveness.

Methods : Thirty-seven adult asthmatics were assigned to mild (MA, n=17), moderate (MoA, n=11), and severe (SA, n=9) groups according to the Global Initiative for Asthma classification. Patients with more than 10 pack-years of smoking history were excluded. We measured the airway wall thickness (T) and internal diameter (d) using high-resolution computed tomography, and then calculated the external diameter (D). The T/D ratio was compared between the groups and correlations between the T/D ratio and pulmonary function (methacholine PC20) were assessed.

Results : The mean T/D ratio was significantly higher in the MoA and the SA groups than in the MA group for the total airways (0.278¡¾0.014, 0.281¡¾0 .019 vs. 0.228¡¾0.013; p=0.022, p=0.021, respectively). The mean T/D ratio was also higher in the SA group than the MA group for the small airways (0.313¡¾0.018 vs. 0.253¡¾0.013; p=0.009). However, there were no significant differences for the large airways. The mean T/D ratio negatively correlated with FEV1 (L) and FEV1 (% of predicted) in total airways (r=-0.519, p=0.001; r=-0.396, p=0.015), small airways (r=-0.567, p<0.001; r=-0.450, p=0.008) and large airways (r=-0.395, p=0.015; r=-0.351, p=0.033). The methacholine PC20 was not related to the T/D ratio.

Conclusions : This study suggests that patients with moderate to severe asthma have greater airway remodeling than those with mild asthma, and the degree of airway wall thickening correlates to the severity of airflow obstruction

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±âµµ °³Çü;±âµµº® ºñÈĵµ;±â°üÁö õ½Ä;°íÇØ»óµµ Àü»êÈ­ ´ÜÃþÃÔ¿µ;Æó±â´É
Airway remodeling;Airway wall thickness;Bronchial asthma;High-resolution computed tomography;Pulmonary function

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