Kubo H1, Nozoe M2, Yamamoto M1, Kamo A1, Kanai M1, Mase K2, Shimada S3
1Itami Kousei Neurosurgical Hospital, Rehabilitation, Itami, Japan, 2Konan Women's University, Faculty of Nursing and Rehabilitation, Kobe, Japan, 3Itami Kousei Neurosurgical Hospital, Neurosurgery, Itami, Japan
Background: Reduction in respiratory muscle strength occurs following stroke, and it is related to cough capacity, walking ability and physical activity. However, the recovery process of respiratory muscle strength in patients following stroke has not been investigated.
Purpose: To investigate the recovery process of respiratory muscle strength in patients during the 3 months following stroke, and to compare their respiratory muscle strength with that of healthy subjects.
Methods: In this prospective, observational study, 19 stroke patients (age: average [SD], 66.6 [11.6] years; 8 females) and 19 healthy subjects (age: average [SD], 62.4 [8.5] years; 9 females) were enrolled. Maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) were assessed at 1, 2, and 3 months from stroke onset in stroke patients and assessed at arbitrary times in healthy subjects. Repeated one-way analysis of variance with Bonferroni post hoc test was used to compare the change in respiratory muscle strength in each period in stroke patients. Mann-Whitney U test was used to compare respiratory muscle strength between stroke patients at 3 months from onset and healthy subjects.
Results: MIP was significantly increased at 3 months compared to 1 month (p = 0.004). MEP was significantly increased in 2 months (p = 0.015) and 3 months (p = 0.004), compared to 1 month. Compared to healthy subjects, MIP (p = 0.036) and MEP (p = 0.019) at 3 months were significantly lower in stroke patients.
Conclusion(s): Respiratory muscle strength was significantly increased during 3 months after stroke onset. However, the trend of recovery may be different; MEP may recover faster than MIP. During the 3 months from onset, respiratory muscle strength after stroke did not recover to the levels seen in healthy subjects.
Implications: The present study may provide an evidence about the recovery process of respiratory muscle strength after stroke patients. In the rehabilitation during the 3 months after stroke onset, it may be necessary to consider the influence of respiratory muscle strength to other function.
Keywords: stroke, respiratory muscle strength, recovery
Funding acknowledgements: There were no supports.
Purpose: To investigate the recovery process of respiratory muscle strength in patients during the 3 months following stroke, and to compare their respiratory muscle strength with that of healthy subjects.
Methods: In this prospective, observational study, 19 stroke patients (age: average [SD], 66.6 [11.6] years; 8 females) and 19 healthy subjects (age: average [SD], 62.4 [8.5] years; 9 females) were enrolled. Maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) were assessed at 1, 2, and 3 months from stroke onset in stroke patients and assessed at arbitrary times in healthy subjects. Repeated one-way analysis of variance with Bonferroni post hoc test was used to compare the change in respiratory muscle strength in each period in stroke patients. Mann-Whitney U test was used to compare respiratory muscle strength between stroke patients at 3 months from onset and healthy subjects.
Results: MIP was significantly increased at 3 months compared to 1 month (p = 0.004). MEP was significantly increased in 2 months (p = 0.015) and 3 months (p = 0.004), compared to 1 month. Compared to healthy subjects, MIP (p = 0.036) and MEP (p = 0.019) at 3 months were significantly lower in stroke patients.
Conclusion(s): Respiratory muscle strength was significantly increased during 3 months after stroke onset. However, the trend of recovery may be different; MEP may recover faster than MIP. During the 3 months from onset, respiratory muscle strength after stroke did not recover to the levels seen in healthy subjects.
Implications: The present study may provide an evidence about the recovery process of respiratory muscle strength after stroke patients. In the rehabilitation during the 3 months after stroke onset, it may be necessary to consider the influence of respiratory muscle strength to other function.
Keywords: stroke, respiratory muscle strength, recovery
Funding acknowledgements: There were no supports.
Topic: Neurology: stroke
Ethics approval required: Yes
Institution: Konan Women’s University
Ethics committee: Research Committee
Ethics number: 2015020
All authors, affiliations and abstracts have been published as submitted.
