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Pulmonary function electronic monitoring devices: a randomized agreement study
Joao A Fonseca1, Altamiro Costa-Pereira, Luis Delgado
1Imunoallergology Division, São João Hospital, Porto, Portugal. jfonseca@med.up.pt
Chest
|September 16, 2005
Summary
The PiKo-1 and Spirotel electronic devices demonstrate excellent reproducibility and accuracy for measuring lung function, comparable to a standard pneumotachograph. These devices are suitable for asthma screening and monitoring.
Area of Science:
- Pulmonary Medicine
- Medical Device Technology
- Respiratory Diagnostics
Background:
- Accurate monitoring of pulmonary function is crucial for managing respiratory diseases like asthma.
- Electronic peak expiratory flow (PEF) meters offer potential advantages in ease of use and data recording compared to mechanical devices.
- Assessing the clinical reproducibility and accuracy of new monitoring devices is essential before widespread adoption.
Purpose of the Study:
- To compare the within-session reproducibility of two electronic pulmonary function devices (PiKo-1, Spirotel) against a mechanical device (Mini-Wright Peak-Flow Meter).
- To evaluate the accuracy of these devices using an office pneumotachograph as a reference standard.
- To determine the suitability of electronic devices for clinical screening and monitoring of respiratory function.
Main Methods:
- Adults without airway diseases and patients with stable asthma performed expiratory maneuvers on each device in a random order.
- Reproducibility of forced expiratory volume in 1 second (FEV1) and PEF was assessed using coefficient of variation (CV) and intraclass correlation coefficient (ICC).
- Accuracy was evaluated using ICC and limits of agreement compared to a pneumotachograph.
Main Results:
- All devices exhibited high reproducibility, with CV < 6% and ICC > 0.94 for both FEV1 and PEF.
- The PiKo-1 device showed high accuracy for FEV1 (ICC = 0.98) and good accuracy for PEF (ICC = 0.90).
- The Spirotel device demonstrated consistent accuracy for both FEV1 and PEF (ICC = 0.95), while the Mini-Wright device had the lowest accuracy (ICC = 0.87).
Conclusions:
- Low-cost, user-friendly electronic devices (PiKo-1, Spirotel) offer very good reproducibility and accuracy, aligning well with pneumotachograph measurements.
- These electronic devices are deemed adequate for both the screening and ongoing monitoring of pulmonary function in clinical settings.
- Further prospective research is recommended to confirm long-term performance and assess their impact on improving respiratory care outcomes.