A note from CF Roundtable: Please do not stop using your Vest or other HFCWO device because of this impractical study. There are important differences in this study that make it not applicable to CF and therefore, not meaningful for us. First, healthy volunteers without CF were enrolled. Too many adults with CF have experienced significant benefits with these HFCWO devices, not to mention the preventive benefits. To imply these devices worsen lung function when used by a healthy nonCF person vs one with CF – with the usual accompanying inflammation, mucus +/- bronchiectasis, etc – is not practical. Second, these healthy subjects tested all 4 HFCWO devices in one day. Even when I repeat spirometry in one day, my lung function numbers most often decline over time, even with rest periods in between. The researchers tested lung function with a rest period of 15 minutes on these healthy individuals after use of the HFCWO device then moved on to the next device. Very impractical and again – not applicable to use by individuals with CF.
By Iqra Mumal
A clinical study into high-frequency chest wall oscillation vests — assessing their short-term impact on standard measures of lung function before and during use — challenges the view that these devices work through airflow bias in the lungs, the process responsible for mucus movement when breathing.
Findings, using established tests that include forced vital capacity (FVC), forced expiratory volume (FEV1), and forced expiratory flow (FEF25%-75%), suggest “that the concept of HFCWO vest-induced cephalad airflow bias is not supported by standard spirometry measurements,” researchers concluded. “None of the vest groups showed statistically significant increased airflow in the lungs.” Continue reading Airway Clearance Vests Fail to Show Measurable Short-term Lung Benefits in Study