Journal of Rehabilitation Research & Development (JRRD)

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In vivo trial results of a novel ultrasonic cough stimulator

Jennifer C. Nitz, PhD, MPhty, BPhty, et al.

Figure 2. Sample of Respitrace (respiratory induction plethysmography) curves illustrating difference between quiet breathing (QB) and coughing. Displacement of curve represents thoracic excursion of subject. Displacement is less during QB (a1–b1) than during coughing (a2–b2). Chest wall movement, and therefore depth of respiration, was greater during coughing than QB. Similarly, slope of Respitrace curve indicates rate of change of thoracic movement. Hence, steepest part of curve (estimated at c1 and c2) indicates period of most rapid chest wall movement. Due to powerful forced expiration involved in coughing maneuver, maximum slope of curve is far greater during coughing (c2) than during QB (c1).

The ability to cough to remove lung secretions is often impaired when the patient is unconscious or when neurological pathology presents. Removal of lung secretions requires frequent invasive bronchial suction in these circumstances. This article reports on trials of a novel ultrasonic cough stimulator (CoughStimTM) that consistently and comfortably stimulated a moderate to strong cough when applied to the side of the neck of nondisabled subjects and those unable to cough on demand. Results suggest the new ultrasound cough stimulator might be a viable alternative to invasive bronchial suction for removal of secretions in vulnerable elderly adults.

Volume 49 Number 9, 2012
   Pages 1421 — 1430


View HTML  ¦  View PDF  ¦  Contents Vol. 49, No. 9
This article and any supplementary material should be cited as follows:
Nitz JC, Perrier J, Cook P. In-vivo trial results of a novel ultrasonic cough stimulator. J Rehabil Res Dev. 2012; 49(9):1421–30.
http://dx.doi.org/10.1682/JRRD.2011.07.0121
ResearcherID: Jennifer C. Nitz, PhD, MPhty, BPhty: F-8745-2010; Peter Cook, MBBS, FANZCA, FCICM: F-4053-2012
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