The immediate effects of passive trunk rotation on chest expansion and lung function in the elderly

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The immediate effects of passive trunk rotation on chest expansion and lung function in the elderly


Author: Cheung, Ying-kit
Title: The immediate effects of passive trunk rotation on chest expansion and lung function in the elderly
Degree: M.Sc.
Year: 1999
Subject: Respiratory therapy
Lungs -- Aging
Chest -- Aging
Older people -- Health and hygiene
Physical therapy
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Nursing and Health Sciences
Pages: ix, 103 leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record:
Abstract: Movement of the chest wall can be affected by restriction and stiffness in the elderly person. A passive trunk rotation protocol has been hypothesised to decrease these limitations and thereby increase the efficiency and effectiveness of respiratory muscle work. An increase in chest expansion and lung function parameters is expected if this hypothesis holds true. This study attempts to demonstrate the immediate effect of passive trunk rotation on chest wall expansion and lung function changes (FVC, FEV1 and PEF). A cross-sectional prospective pre- and post-test control group experimental design was used. Convenience sampling was applied and sixty-five normal healthy elderly subjects were recruited from 13 old age centres. All subjects involved were free from any known cardiopulmonary disease, neurological pathology, mental illness, cancer, severe chest wall deformity, hypertension, skin disease and musculo-skeletal disorders involving the thoracic and shoulder regions. The subjects were randomly divided into the intervention (n = 32) and control (n = 33) groups. The control group received no intervention while the intervention group received a passive trunk rotation protocol. Baseline spirometry (FVC, FEV1, and PEF) and chest expansion measurements were taken one hour before and immediately after the protocol for the intervention group. For the control group, two measurements were taken at an interval of one hour apart. The baseline and post-intervention measurements between the two groups were compared using the MANCOVA test with a pre-determined significance level (α2) set at 0.05. The results demonstrated that height acted as a covariate and the adjusted outcomes showed a significant increase in the change of chest expansion, CEΔ (p = 0.001) and peak expiratory flow rate, PEFΔ (p = 0.007) in the intervention group. The mean increase in CEΔ and PEFΔ between the pre- and post-test were 0.33 +- 0.46 cm and 18.03 +- 34.58 litre/ min respectively in the intervention group. The mean change of forced vital capacity, FVCΔ and forced expiratory volume in one second, FEV1Δ were not significant (p = 0.628 and 0.305 respectively) when compared with the control group which did not show any significant changes in CEΔ, FVCΔ, FEV1Δ and PEFΔ. This study demonstrated that the passive trunk rotation protocol had an immediate effect in improving CE and PEF and is recommended as a useful adjunct to other respiratory physiotherapy techniques especially for improving chest wall stiffness and restriction. The minimal changes in FVC and FEV1 may be due to the insensitivity of these measurements in response to the intervention or the small sample size of the group. Further research was required in this aspect.

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