Comparison of Intrapulmonary Percussive Ventilation and Chest Physiotherapy: Materials
Participants went without breakfast and received regularly prescribed oral medications, but did not receive home chest physiotherapy on each morning of the study. Pulmonary function testing (PFT), including forced vital capacity (FVC), forced expiratory volume in 1 s (FEVi), peak expiratory flow (PEF), and mean forced expiratory flow during the middle half of vital capacity (FEF25-75), was administered by a pulmonary function technician unaware of the treatment regimen to be received by the participant. Buy birth control pills online Link The best of three FVC maneuvers was obtained and recorded for each participant. The same technician and ATS-approved spirometer (Gould System 21, Sanyo, Compton, Calif) were used for all PFT measurements throughout the study.
After pretreatment PFTs were obtained, participants were randomized to one of three treatment groups. A second respiratory technician, experienced with both P&PD as well as the IPV-1, administered the assigned treatment to each participant. Upon completion of each 24-h study day, participants were asked to resume their regularly prescribed home chest physiotherapy regimens.
The PFTs were recorded as percent of predicted values, and the differences between pretherapy and posttherapy values were compared. The latter were obtained at 1 and 4 h after the initiation of treatment. In addition, all sputum expectorated was collected over two time periods: the initial 4 and subsequent 20 h after each treatment. During the first 4 h, salivary contamination was minimized by placing dental cotton in the mouth over the parotid duct before sputum expectoration. The quantity of sputum expectorated was determined by volume. Then this sample was stored at —70°C prior to determination of sputum physical properties. The second sputum sample, expectorated over the next 20 h, was collected for volume determination.