Bigger Pulses. Better Therapy. Download PDF

Are hoseless vests powerful enough to deliver effective therapy?
That’s a question patients and healthcare teams have been asking.

A known method for gauging vest therapy effectiveness is to measure air pulses emitted from the user’s mouth during treatment. The size of the pulses indicates the strength of the airway clearance therapeutic action.1 The larger the pulses, the better.

Using airflow at the mouth, independent testing shows that the inCourage® System delivers much stronger pulsations than AffloVest®.2 Even with the device set to maximum, AffloVest pulses are almost 90% less powerful than the inCourage System’s brief, CPT-like pulses. These stronger air pulses of the inCourage System “thump” the chest to loosen and mobilize mucus so it can be cleared from the airways.

Also, the duration and range (amplitude) of AffloVest’s very fast vibrations are small, so little air is moved—and air movement is critical for effective airway clearance therapy.3

1. Milla CE, Hansen LG, Weber A, Warwick WJ. High-Frequency chest compression: effect of the third generation compression waveform. Biomed Instrum Technol 2004; 38:322-328.
2. Results from a study conducted by an independent clinical research facility following a valid, accepted protocol for measuring vest pulse strength. Subjects wearing the vests breathed through a pneumotachometer, which measures and records the velocity of expired breaths many times per second. Using the recorded data, a computer separates the vest pulses from normal breath waveforms and provides statistically valid estimates of vest pulse strength. Study sponsored by RespirTech.
3. Hansen LG, Warwick WJ, Hansen KL. Mucus transport mechanisms in relation to the effect of high frequency chest compression (HFCC) on mucus clearance. Pediatr Pulmonol. 1994;17(2):113-118.

AffloVest is a trademark of International Biophysics Corporation.