Article: Flow-type spirometer errors that elevate test results described.

2004 JUL 19 - (NewsRx.com & NewsRx.net) -- Flow-type spirometer errors that elevate test results have been identified and characterized.

"Most spirometry errors reduce test results, and it is widely assumed that measurement accuracy is guaranteed by frequent spirometer calibrations or calibration checks," scientists in Pittsburgh explained. "However, zero errors and changes in flow-type spirometer sensors may occur during testing that significantly elevate test results, even though the spirometer was calibrated recently."

"To draw attention to these often-unrecognized problems," M.C. Townsend and colleagues at Townsend Associates described "anomalous ...

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