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Mediators Inflamm. 2003 Feb;12(1):47-9.

Exhaled nitric oxide in mylar balloons: influence of storage time, humidity and temperature.

Author information

  • 1Department of Pediatrics/Respiratory Medicine Erasmus University Medical Centre, Rotterdam/Sophia Children's Hospital, P.O. Box 2060, 3000 CB Rotterdam, The Netherlands.

Abstract

BACKGROUND:

Mylar balloons are used to collect exhaled air for analysis of fractional nitric oxide concentration (FENO).

AIM:

We studied the effect of storage conditions on the stability of nitric oxide (NO) in mylar balloons.

METHODS:

Exhaled air samples and calibration gases were stored in mylar balloons at 4, 21 and 37 degrees C, with or without silica gel. NO was measured after 0, 6, 9, 24 and 48 h. Scheffe F-tests were used to compare NO values.

RESULTS:

NO remained stable in balloons for 9 h at all temperatures, without silica gel. NO increased between 9 and 48 h, but only with low initial FENO. Silica gel increased variability.

CONCLUSIONS:

FENO in mylar balloons is stable for at least 9 h. The storage temperature is not critical, but silica gel increases variability.

PMID:
12745548
[PubMed - indexed for MEDLINE]
PMCID:
PMC1781591
Free PMC Article
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