Technical and Functional Assessment of 10 Office Spirometers: Comment

Technical and Functional Assessment of 10 Office Spirometers: CommentAt variance with standard spirometers, the majority of the office spirometers were not calibrated during the study (Table 1). This may seen somewhat surprising in a laboratory study, but we wanted to respect the instructions of the vendors/manufacturers also in terms of calibration. We must keep in mind that these devices are devoted for the use by GPs and not for laboratory purposes.
The limits of precision of the office spirometers reported in this study refer to short-term repeatability. In real circumstances, the repeatability may decrease after several months if the users do not check regularly the spirometers, especially with screen-type pneumotachographs that commonly become clogged with secretions. buy glucophage online
In conclusion, the availability of accurate, precise, and easy-to-use office spirometers is a condition for widespread use of spirometry in general practice. This survey shows that several office spirometers have a high score of user friendliness, but their instrumental properties are variable. All but one of the devices had excellent reproducibility for FEV1. Moreover, we observed low biases and acceptable limits of agreement for FEV1 in four office spirometers. However, several devices presented a proportional difference for FEV1, leading to underestimation or overestimation of results. Furthermore, the lack of precision of FVC and unacceptable limits of agreement between FEV1 and FVC may lead to a risk of misclassification of patients according to the GOLD criteria for COPD.
For all the office spirometers tested, more attention should be paid to improve the accuracy and precision of FVC because it limits the interchangeability of the spirometric data between the GP and the PFT laboratory. Import and export facilities of the spirometric data should also be improved. More investigation is needed to assess the overall quality of these rapidly changing instruments. Finally, we confirm that in vivo testing of the spirometers gives additional information to the strict in vitro benchmark study. This study could be used as model for the users and the manufacturers wishing to test new devices.

This entry was posted in Spirometers and tagged comparative study, COPD detection, pulmonary function tests, spirometer, spirometry.