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Above: Micro Medical spirometers undergoing Quality Assurance testing
The measurement accuracy of Turbine Flow Heads manufactured by Micro Medical remains unaffected by changes in environmental conditions. In consequence their factory-set calibration remains extremely stable(2) and they do not require routine calibration adjustment. In accordance with international guidelines,(1) however, their accuracy can be quickly verified by using a 3 litre calibration syringe or by performing a 'biological quality control check' (guidance outlined below)
A 'biological quality control check' involves performing 3 technically correct Spirometry manoeuvres on the device, (using the same healthy individual for each biological check) and is also recommended as an indicator of the instruments accuracy performance (1)
(1) Standardisation of Spirometry M.R Miller et al. ATS/ERS Task Force: Standardisation of Lung Function ;Testing Eur Respir J 2005; 26: 319-338.
(2) Dirksen A, Madsen F, Pedersen OF, Vedel, Jensen AK. Long term performance of a hand held Spirometer. Thorax 1996; 52:973-976.
(3) Technical and Functional assessment of 10 Office Spirometers. A Multicenter Comparative Study Giuseppe Liistro, Carl Vanwelde et al CHEST/30/3/ September 2006.
(4) A 3 litre calibration syringe (catalogue number SM2125) can be obtained from Micro Medical Ltd in the UK or from one of their approved distributors internationally. For more information please click here