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Which of the following statements about calibration of spirometers is true?

(Please select 1 option)

Calibration should be checked daily
Calibration should be checked before each spirometry session
Calibration checks should be carried out before each session or after every 10th patient
Some types of spirometer do not need their calibration checked
Calibration syringes should read +/- 5% of true.

234 of 15 questions answered (1560%)