Effects of Expiratory Abdominal Compression on Respiratory Function

KANEKO Hideo, OHNO Masaya, MORODOMI Seiichi, IMAYAMA Takashi, NAGAI Yoshiharu, MATSUDA Kensuke

doi:10.1589/rika.26.661

[Purpose] To investigate the effects on respiratory function of expiratory abdominal compression designed as an alternative technique to expiratory rib cage compression. [Subjects] Ten healthy male subjects participated. [Methods] Subjects underwent manual expiratory compression of the upper rib cage, lower rib cage and abdomen in the supine position, and that of the abdomen in Fowler’s position. The tidal volume (VT), minute ventilation (VE), respiratory rate (RR), changes in diaphragm thickness (ΔTdi%), and ΔTdi%/VT during quiet breathing and the interventions were compared. [Results] Compared to quiet breathing, VT and VE significantly increased and RR significantly decreased during all the interventions. However, there were no significant differences between the interventions. ΔTdi% significantly increased in expiratory abdominal compression in Fowler’s position compared to quiet breathing; ΔTdi% was not able to be measured in the lower rib cage compression. ΔTdi%/VT in expiratory abdominal compression in Fowler’s position indicated the highest value and it was significantly increased compared to that in the expiratory compression of the upper rib cage and abdomen in the supine position. [Conclusion] These results suggest that expiratory abdominal compression increases ventilation as well as expiratory rib cage compression, and that in Fowler’s position, it enhances diaphragmatic contribution to tidal volume.<br>

Effects of Expiratory Abdominal Compression on Respiratory Function

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