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The Effects of Inspiratory Pressures on Diaphragmatic Contraction in People After Stroke

NCT06267768 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 36

Last updated 2025-01-28

No results posted yet for this study

Summary

This is a cross-sectional study to determine the optimal inspiratory muscle training (IMT) intensity for stroke survivors. Participants will breathe through a pressure threshold inspiratory loading device with varying loads in random order. Each IMT intensity protocol consists of 10 breaths. During the test, accessory inspiratory muscle activity will be measured with surface electromyography (sEMG) and diaphragm thickness will be used to assessed with ultrasonography. Repeated-measures ANOVA will be used for statistical analysis to determine the most effective training intensity for future study.

Conditions

Interventions

DIAGNOSTIC_TEST

Various intensities of inspiratory muscle training

Each participant will be asked to perform the lung function test to measure the maximal inspiratory pressure (MIP) after including the study. After the baseline measurement, all participants will be requested to use a nose clip to hold the nose and breathe with the mouth through a pressure threshold inspiratory loading device (POWERbreathe, KH2, England). The inspiratory pressure will be set at 30%, 40%, 50%, 60%, 70%, or 80% of their MIP, in random order. Each MIP intensity protocol consists of 10 breaths. Resting will be allowed between different protocols of contraction intensity (% MIP). During the test, sternocleidomastoid muscle activity will be measured with surface electromyography (sEMG) and diaphragm thickness will be used to assessed with ultrasonography.

Sponsors & Collaborators

  • Shenzhen Second People's Hospital

    collaborator OTHER

  • Hong Kong Metropolitan University

    lead OTHER

Principal Investigators

  • Tsang William · Hong Kong Metropolitan University

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-03-02
Primary Completion
2024-08-17
Completion
2024-08-17

Countries

  • China

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06267768 on ClinicalTrials.gov