健常成人における臥位姿勢の違いが随意的咳嗽力に与える影響—腹臥位姿勢に着眼して

Effect of Posture on Voluntary Cough Strength in Healthy People

要旨

目的：本研究の目的は，健常成人を対象に咳のピークフロー（cough peak flow：CPF）を測定し，臥位姿勢と随意的咳嗽力の関係を明らかにすることである．

方法：健常成人50名を対象に，背臥位，腹臥位，腹部に枕を挿入した腹臥位（以下，枕腹臥位）の3肢位でCPF，最大吸気時胸郭周径，最大呼気時胸郭周径，胸郭拡張差，血圧，脈拍数を測定した．

結果：CPF，最大吸気時胸郭周径，最大呼気時胸郭周径は背臥位より枕腹臥位で有意に高値を示した．胸郭拡張差，血圧は有意差を認めなかった．脈拍数は背臥位より腹臥位，枕腹臥位で有意に高値を示した．

結論：本研究の結果，枕腹臥位では随意的咳嗽力が向上することが示唆された．

Abstract

Objective：This study investigated the relationship between posture and voluntary cough strength in healthy people.

Methods：The participants were 50 normal adults. We measured cough peak flow (CPF), chest circumferences at maximal inspiratory level and maximal expiratory level, blood pressure, and pulse rate in the supine position, prone position, and prone position with a pillow under the abdomen. The difference between chest circumferences at maximal inspiratory and maximal expiratory levels was calculated and defined as the thoracic expansion difference.

Results：CPF and chest circumferences at maximal inspiratory level and maximal expiratory level were significantly higher in the prone position with a pillow under the abdomen than in the supine position. There were no differences in thoracic expansion difference and blood pressure among all the positions. Pulse rate was significantly lower in the supine position compared with the other positions.

Conclusion：We concluded that voluntary cough strength would increase in the prone position with a pillow under the abdomen.