Source: Annual Congress 2002 - Physiotherapy: assessment and outcome in healthy subjects and patients with chronic lung disease
Disease area: Airway diseases

Abstract

Aims: To determine the pattern of diaphragm (DI) and scalenus (SC) muscle recruitment wich eletromyography during incentive spirometry using buccal (IS-buccal) or mask (IS - mask) and breath-stacking (BS). Materials and Methods:Sixteen female volunteers with normal clinic exam and pulmonary function tests were evaluated. While the volunteers were at 30[degree] recumbency angle, eletromyographic signals of DI and SC muscle were recorded continuously. Respiratory muscle recruitment were investigated in two conditions, with IS and BS. The maximal inspiratory volumes (MIV) reached were obtained by the wright ventilometer. Results: The comparison between recruitment intensity during the different kinds of maneuvers in each muscle was calculated by integrating the area of eletric activity times the period of time ( m V.sec). The recruitment intensity raised progressive and significantly in DI (IE-buccal = IE-mask<BS) and SC (IE-buccal <IE-mask<BS) muscle. The comparison between DI and SC muscle was done by the equation : % of increase = (Peak max - Peak min) / Peak max.100. There was no difference between DI and SC recruitment pattern. The MIV and time of recruitment were significantly superior during BS. Conclusion: These results suggest that the higher volume reached by BS could be caused by a longer duration of the maneuver. The DI and SC recruitment intensity muscle are similar in both proceders.

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L. Campanha, K. P. Prazeres, I. M. Oliveira, A. F. Dornellas de Andrade, M. M. Cunhas Torres, M. D. G. Rodrigues-Machado (Belo Horizonte, Recife, Brazil). Pattern of respiratory muscle recruitment during incentive spirometry and breath-stacking. Eur Respir J 2002; 20: Suppl. 38, 1155

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