Effect of High Frequency Chest Wall Oscillation Vests on Spirometry Measurements

The study will be broken into three (3) arms:

- AffloVest® & The Vest®

- AffloVest® & inCourage®

- AffloVest® & SmartVest® Subjects will be randomly assigned to an arm. Within each arm,
the order of products will be also randomized.

Baseline spirometry (Forced Expiratory Volume (FEV1), Forced Vital Capacity (FVC), Peak
Expiratory Flow (PEF), Forced Expiratory Flow (FEF25-75%) and Tidal Volume (TV)) will be
taken at the beginning, middle and end of each series of measurements with each subject,
without any device on the subject.

A product (AffloVest or Compressor-based vest) will be placed onto subject and turned ON to
the highest frequency and intensity settings. Then the subject will be given a certain period
of time to adjust and spirometry measurements will then be repeated, then The product will be
removed and the subject will be allowed a recovery period, then the other product will be
placed on the subject, turned ON and spirometry measurements will repeated.

Inclusion Criteria:

- Healthy subject, ages 18 - 50

Exclusion Criteria:

- Non-ambulatory, diagnosed neuromuscular disorder, currently using any type of
oscillation vest therapy, diagnosed co-morbid condition (i.e. lung cancer, other lung
disorder or disease), currently enrolled in a medical research study, non-English
speaking