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Completed

NCT Number: NCT06861985

Effects of HFMH-EMS on Ocular Artery Circulation

Investigated the effects of high-frequency multi-band harmonic electromagnetic stimulation on ophthalmic and central retinal artery circulation.

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Key information

Conditions

Ocular Surface Disease Arterial Occlusive Diseases Cardiovascular Diseases Central Retinal Artery Occlusion Eye Diseases Retinal Artery Occlusion Retinal Diseases Vascular Diseases

Age range

20 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

National Central University

Hsinchu, Taiwan, 30013

About this study

This study investigated the effects of prolonged smartphone usage for over 90 minutes on ophthalmic and central retinal artery circulation before and after smartphone use and compared the effects with versus without intervention by high-frequency multi-band harmonic electromagnetic stimulation.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 20 to 65 years old

Exclusion criteria

  • hypertension
  • diabetes
  • heart disease
  • eye-related diseases

Treatment and study plan

BOBY

Device

high-frequency multi-band harmonic electromagnetic stimulation device

Control

Other

placebo group

Primary outcomes

  1. Peak Systolic Velocity (PSV)

    Time frame: At the first visit and after 90 minutes usage of device.

    peak systolic velocity (PSV) of the ophthalmic artery (OA) were measured using color Doppler ultrasound of the eye arterial blood flow (EPIQ Elite ultrasound system, PHILIPS).

  2. End Diastolic Velocity (EDV)

    Time frame: At the first visit and after 90 minutes usage of device.

    end diastolic velocity (EDV) of the ophthalmic artery (OA) were measured using color Doppler ultrasound of the eye arterial blood flow (EPIQ Elite ultrasound system, PHILIPS).

  3. Central Retinal Artery (CRA)

    Time frame: At the first visit and after 90 minutes usage of device.

    Central Retinal Artery (CRA) were measured using color Doppler ultrasound of the eye arterial blood flow (EPIQ Elite ultrasound system, PHILIPS).

Sponsors and collaborators

Lead sponsor

Chung Shan Medical University

Other

Registry information

Official study title

The Effects of High-Frequency Multiband Harmonic Electromagnetic Stimulation (HFMH-EMS) on Ocular Artery Circulation After Prolonged Smartphone Usage

Important dates

Study start
2023
Primary completion
2023
Study completion
2023
First posted
Mar 6, 2025
Registry last updated
Mar 6, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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