Study on Abnormality Detection Method Using Surface Electromyography

Study on Abnormality Detection Method Using Surface Electromyography in Patients with Neuromuscular Diseases

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1072240102

Enrollment

Registered

2025-01-27

Start date

2025-01-27

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Neuromuscular disease

Interventions

Surface electromyography recording using active electrodes

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1) Patients who meet either i or ii. i. Patients for whom needle electromyography is deemed necessary for diagnosis in clinical practice. ii. Patients diagnosed with myasthenia gravis or suspected of having myasthenia gravis. 2) Patients who fully understand this research plan and have provided written informed consent. 3) Patients who are at least 18 years old at the time of consent acquisition.

Exclusion criteria

Exclusion criteria: 1) Patients for whom the attachment of surface electromyography electrodes is expected to be difficult due to body size or other factors. 2) (When meet eligibility criterion 1-i) Patients for whom needle EMG is expected to be difficult due to high pain sensitivity, inability to remain still, or other reasons. 3) Patients with extensive skin lesions. 4) Patients whom the researcher deems inappropriate as study participants.

Design outcomes

Primary

Measure	Time frame
Detection rate of abnormal findings observed in needle electromyography (EMG) using surface electromyography with active electrodes(sensitivity)	—

Secondary

Measure	Time frame
1) Detection rate (sensitivity) of abnormal findings observed in needle electromyography (EMG) using conventional surface EMG. 2) Specificity of detecting abnormal findings using surface EMG with active electrodes. 3) Specificity of detecting abnormal findings using conventional surface EMG. 4) Agreement rate between needle EMG and surface EMG with active electrodes. 5) Agreement rate between needle EMG and conventional surface EMG. 6) Background factors of patients that influence the detection of abnormal findings in surface EMG. 7) Proportion of cases with abnormalities in surface EMG with active electrodes during full contraction, by clinical diagnosis.	—

Measure

Time frame

1) Detection rate (sensitivity) of abnormal findings observed in needle electromyography (EMG) using conventional surface EMG. 2) Specificity of detecting abnormal findings using surface EMG with active electrodes. 3) Specificity of detecting abnormal findings using conventional surface EMG. 4) Agreement rate between needle EMG and surface EMG with active electrodes. 5) Agreement rate between needle EMG and conventional surface EMG. 6) Background factors of patients that influence the detection of abnormal findings in surface EMG. 7) Proportion of cases with abnormalities in surface EMG with active electrodes during full contraction, by clinical diagnosis.

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Contacts

Public ContactKobayakawa Yuko

Kyushu University Hospital

shinkein@med.kyushu-u.ac.jp+81-92-642-5340

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026