The Effect of a Proton-pump Inhibitor in Unexplained Chronic Cough Patients

진단이 내려지지 않은 만성기침 환자에서 양자펌프억제제의 치료효과

  • Yang, Joo Youn (Department of Internal Medicine, Dankook University College of Medicine) ;
  • Lee, Ho Youn (Department of Internal Medicine, Dankook University College of Medicine) ;
  • Kim, Nam Hee (Department of Internal Medicine, Dankook University College of Medicine) ;
  • Kim, Youn Seup (Department of Internal Medicine, Dankook University College of Medicine)
  • 양주연 (단국대학교 의과대학 내과학교실) ;
  • 이호연 (단국대학교 의과대학 내과학교실) ;
  • 김남희 (단국대학교 의과대학 내과학교실) ;
  • 김윤섭 (단국대학교 의과대학 내과학교실)
  • Received : 2006.07.25
  • Accepted : 2006.08.16
  • Published : 2006.08.30

Abstract

Background: Recent studies have suggested an association between chronic cough and gastroesophageal reflux. Our study aimed to assess the utility of a proton-pump inhibitor in unexplained chronic cough patients. Methods: Patients with chronic cough of unknown etiology were evaluated using a chest x-ray, methacholine challenge test, and an empirical trial of postnasal drip therapy. After excluding other potential causes of the cough, forty patients were included in the study and treated for 8 weeks with a proton-pump inhibitor. Results: Eleven and three patients in the first and second 4 weeks were lost to follow-up, leaving twenty-six patients finally included in the study. Of these patients, two were unimproved, eight partially responded to the proton-pump inhibitor and sixteen responded completely after the 8 week treatment. Conclusion: We suggest that empirical treatment with a proton pump inhibitor in all patients with persistent cough, which is not secondary to asthma or postnasal drip syndrome, represents a practical and simple approach to this ailment.

연구배경: 8주 이상 지속되는 만성 기침의 원인 중 하나인 위식도역류질환는 환자의 약 75%가 증상이 없으며, 진단을 위한 24시간 식도 pH감시가 침습적이고 검사가 어려워 진단 및 치료에 어려움이 있다. 따라서 만성 기침환자 중 후비루증후군 및 기관지 천식이 아닌 환자를 대상으로 양자펌프억제제를 투여하고 치료효과를 관찰하였다. 방법 및 대상: 기침증상이 8주 이상인 만성기침 환자 중 X-ray 소견상 이상이 없고 메타콜린 기관지유발시험상 음성이며, 후비루증후군 치료에 반응이 없었던 40명을 대상으로 하였다. 8주 이상 양자펌프억제제를 투여하였으며 50%이상 기침이 감소한 경우를 부분 반응군, 기침이 거의 소실된 경우를 완전 반응군으로 분류하였다. 결 과: 대상자 40명중 29명만이 4주 이상 추적되었으며 이중 26명만이 8주까지 추적 관찰되었다. 29명중 남자가 9명, 여자가 20명이었으며 평균나이는 51세였다. 대상자들에서 기침 이외의 증상은 객담이 12%, 콧물이나 비폐색 등의 코 증상이 있는 환자는 10%, 속쓰림, 소화불량 등의 소화기 증상을 호소하는 환자는 13.4%였다. 29명중 4주간 투여 후 증상의 호전이 없는 환자가 3명(10.3%), 50% 이상의 증상호전을 보이는 환자가 22명(75.9%), 그리고 증상이 거의 소실된 환자가 4명(13.8%)로 약 90%정도의 환자가 기침의 증상호전이 있었다. 8주 투여 후 호전이 없는 환자가 2명(7.4%), 50% 이상 증상호전이 있는 환자가 8명(29.6%), 증상이 거의 소실된 환자가 16명(63.0%)이었다. 결 론: 8주이상의 만성기침 환자에서 8주 이상 양자펌프억제제 투여 후 92.6%환자가 증상호전이 있었으며 이중 63%는 거의 소실되었다. 하지만 본 연구는 위약을 통한 대조군이 없는 관계로 그 결과의 해석에 어려움이 있다. 앞으로 좀더 많은 환자를 대상으로 하는 이중맹검시험이 필요할 것으로 생각된다.

Keywords

References

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