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논문 기본 정보

자료유형
학술저널
저자정보
Marjolein Willemsen (KidZ Health Castle) Kristel Van De Maele (KidZ Health Castle) Yvan Vandenplas (KidZ Health Castle)
저널정보
대한소아소화기영양학회 Pediatric Gastroenterology, Hepatology & Nutrition Pediatric Gastroenterology, Hepatology & Nutrition 제25권 제1호
발행연도
2022.1
수록면
13 - 20 (8page)
DOI
10.5223/pghn.2022.25.1.13

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Purpose: Hydrogen-methane breath tests are used to diagnose carbohydrate malabsorption and small intestinal bacterial overgrowth. The COVID-19 pandemic has driven the modification of procedures as breath tests are potentially aerosol-generating procedures. We assessed the effect of delayed analysis of breath samples, facilitating the at-home performance of breath testing. Methods: Children provided two breath samples at every step of the lactose breath test. The samples were brought back to the clinic, and one set of samples was analyzed immediately. The second set was stored at room temperature and analyzed 1-4 days later. Results: Out of the 73 “double” lactose breath tests performed at home, 33 (45.8%) were positive. The second samples were analyzed 20 to 117 hours after the first samples (41.7±24.3 hours). There was no significant difference in the hydrogen concentration between the first and second sets (Z=0.49, p=0.62). This was not the case for methane, which had a significantly higher concentration in the second breath samples (Z=7.6). Conclusion: Expired hydrogen levels remain stable in plastic syringes if preserved at room temperature for several days. On the other hand, the delayed analysis of methane appeared to be less reliable. Further research is needed to examine the impact of delayed analysis on methane and hydrogen concentrations.

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