Two models of high frequency chest compression therapy: interaction of jacket pressure and mouth airflow.
High frequency chest compression (HFCC) therapy assists clearing the secretions in the lung. This paper presents two mathematical models: 1) HFCC jacket function model (JFM) and 2) respiratory function model (RFM). JFM predicts the variation of the jacket pressure (Pj) from the respiratory pattern of mouth airflow (Fm). RFM predicts the HFCC induced mouth airflow (Fm) from the HFCC pulse pressures at the jacket (Pj). Fm and Pj were measured from a healthy subject during HFCC therapy. JFM, which was implemented with 2nd order system using prediction error method, shows the existence of breathing pattern at Pj. RFM, which was implemented with amplitude modulation technique, shows how the HFCC pulses affects to the Fm. JFM calculations match 78% of the measured respiratory pattern of Pj>. RFM calculations match 90% of measured HFCC induced Fm. These models can be used to test new breathing patterns before designing studies on patients having chronic obstructive pulmonary diseases.
Lee
Yong Wan
YW
Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA. leeyongwan@gmail.com
Lee
Jongwon
J
Warwick
Warren J
WJ
D000328:Adult; D035641:Chest Wall Oscillation / Q000379:methods; D006801:Humans; D008297:Male; D008954:Models, Biological; D012123:Pulmonary Ventilation