![]() The median parental score (potential score 0–20) of the application was 18 (15–20).ĭiscussion/Conclusion: The study shows promising results for home monitoring of PEF by an electronic device with automatic teletransmission. For the remaining 21 children, the median (quartiles) days with at least one measurement during the period were 27 (21–29.5), and on median 18 (9–24) days PEF was recorded twice daily. Results: One child did not manage to upload PEF. At the end, the parents graded the device and application. At inclusion, the Pediatric Asthma Quality of Life Questionnaire and the Childhood Asthma Control Test were answered. Through mathematical algorithms, the sound was transferred to PEF, which was uploaded to a server. Materials and Methods: Twice daily during 4 weeks, children aged 5–12 years with current asthma rated their asthma condition electronically on the smart phone application Blowfish before inhaling deeply then exhaling into the device to produce a high-pitched sound recorded by the application. In this feasibility study, we aimed to study if asthmatic children can measure PEF at home twice daily during a 4-week period using a device designed as a “whistle” and a smart phone software application. Home monitoring of PEF may be helpful to diagnose and monitor asthma. ![]() Introduction: Variable airflow obstruction that can be confirmed by diurnal variability of peak expiratory flow (PEF) >13% is an important characteristic of asthma.
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