A cleaning and calibration method for the spiropro portable spirometer's pneumotachometer tube in a remote field study

Matthew R. Baldwin, William Checkley, Robert A. Wise, Subarna K. Khatry, Steve C. LeClerq, Keith P. West

Research output: Contribution to journalArticle

Abstract

BACKGROUND: We developed a systematic method of cleaning and calibration-checking for the pneumotachometer tube of the SpiroPro portable spirometer; this method maximized spirometry accuracy in a population-based study in a remote area of Nepal.& METHODS: We tested 10 factory-calibrated pneumotachometer tubes. Each use consisted of a full set of spirometry maneuvers, per the American Thoracic Society (ATS) spirometry criteria.& RESULTS: The pneumotachometers remained accurate, per the ATS criteria, for 5-9 disinfections, but began to drift toward inaccuracy after the first disinfection. All the pneumotachometers had become inaccurate, per the ATS criteria, after 10 disinfections.& CONCLUSIONS: In a remote field setting the SpiroPro pneumotachometer tube can be cleaned and reused 5-9 times before it becomes inaccurate per the ATS criteria. Rigorous rinsing in distilled water and repeated calibration checks, at various flows up to 12 L/s, are essential for precise and accurate spirometry with the SpiroPro. Reusing the SpiroPro pneu-motachometer in a remote setting may impose measurement bias. Single use of SpiroPro pneumo-tachometers, albeit more costly, will provide better data.

Original languageEnglish (US)
Pages (from-to)443-452
Number of pages10
JournalRespiratory care
Volume55
Issue number4
StatePublished - Apr 1 2010

Keywords

  • Accuracy
  • Calibration
  • Disinfection
  • Pneumotachometer
  • Portable
  • Spirometry

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine

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