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Major Depressive DisorderTPSNCT05006365

EffectsOfTranscranialPulseStimulationOnDepression-PilotRCT

A study testing Transcranial Pulse Stimulation in people with Major Depressive Disorder, run by The Hong Kong Polytechnic University at 1 site in Hong Kong.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The aim of this study is to evaluate the effects of transranial pulse stimulation (TPS) on young adults with symptoms of depression in Hong Kong. Methods: This is a single-blind randomized controlled trial design with two-armed repeated measures, and participants will be followed up at a 3-months post-stimulation… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Major Depressive Disorder
What is being tested?
Transcranial Pulse Stimulation
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
30 participants
Where
1 siteHong Kong
Study dates
2 Aug 2021to 28 Jan 2023
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Aged 18 or over
  • Able to understand/read Chinese
  • A HAM-D-17 score of ≥ 8
  • Able to provide written informed consent

Who cannot join

  • Clinical Diagnosis of Major Depressive Disorder (e.g., bipolar affective disorder or schizophrenia)
  • Alcohol or substance dependence
  • Concomitant unstable major medical conditions or major neurological conditions such as brain tumor, brain aneurysm
  • Hemophilia or other blood clotting disorders or thrombosis
  • Significant communicative impairments
  • Participants with metal implant in brain or treated area of the head
  • Participants who undertook corticosteroid treatment within the last six weeks before first TPS treatment
  • Pregnant or breastfeeding women.

Trial locations and contacts

1 site in 1 country.

Hong Kong1 site
  • School of Nursing HongKongPolyU

    Hong Kong

Other trials in Hong Kong

About this study

Official title: Effects of Transcranial Pulse Stimulation (TPS) on Young Adults with Symptoms of Depression - a Pilot Randomized Controlled Trial

The aim of this study is to evaluate the effects of transranial pulse stimulation (TPS) on young adults with symptoms of depression in Hong Kong. Methods: This is a single-blind randomized controlled trial design with two-armed repeated measures, and participants will be followed up at a 3-months post-stimulation period. Eligbility: 1) aged 18 or over; 2) able to understand/read Chinese; 3) HAM-D-17 score of ≥ 8; 4) provide written informed consent. Exclusion criteria includes: 1) individuals being prescribed a DSM-5 diagnosis other than major depressive disorder (e.g., bipolar affective disorder or schizophrenia); 2) Alcohol or substance dependence; 3) Concomitant unstable major medical conditions or major neurological conditions such as brain tumour, brain aneurysm; 4) Haemophilia or other blood clotting disorders or thrombosis; 5) Significant communicative impairments; 6) Participants with metal implant in brain or treated area of the head; 7) Participants who undertook corticosteroid treatment within the last six weeks before first TPS treatment; 8) Pregnant or breastfeeding women. Recruitment: A total of 30 subjects will be recruited from collaborative NGOs and PolyU and randomly assigned into the Intervention Group (TPS) and the Waitlist Control Group on a 1: 1 ratio. Intervention: All participants (both TPS group and the waitlist control group) will receive six 30 minute-TPS sessions (300 pulse in each session, total: 1800 pulse) in 2 weeks' time. Outcome measurements include depression, anhedonia, instrumental activities of daily living, cognition and neuroimaging.

Read the detailed description
  1. PRIMARY OBJECTIVE: To evaluate the effects of Transcranial Pulse Stimulation (TPS) on symptoms of depression among young adults in Hong Kong. SECONDARY OBJECTIVES:
  2. To improve young adults' Anhedonia symptoms after the 2-week TPS intervention and will be maintained at 3-month post-intervention follow-up
  3. To improve young adults' Instrumental Activities of Daily Living (IADL) after the 2-week TPS intervention and will be maintained at 3-month post-intervention follow-up.
  4. To improve young adults' Cognition after the 2-week TPS intervention and will be maintained at 3-month post-intervention follow-up.
  5. Post-MRI scan will show a remarkable structural and functional connectivity in participants' brain after the 2-week TPS intervention compared to pre-MRI scan.

Sample size estimation: To the best of investigator's knowledge, there is only one TPS uncontrolled pilot study conducted on 35 patients with AD in Austria and therefore, we cannot base on their effect size to estimate our sample size in this study. Considering the nature of this study is the first pilot RCT in using TPS in the treatment of depression,investigators aim at recruiting 30 subjects to evaluate the efficacy of our primary and secondary outcomes in this study.

Research plan and Methodology Methods Trial Design: In this study, the investigators will use a single-blind randomized controlled trial design with two-armed repeated measures. The trial design complies with the Consolidated Standards of Reporting Trials (CONSORT) statement. In this two-armed design, investigators will use TPS as an intervention group and a waitlist control group. A waitlist control group is appropriate for comparing the effect of the TPS on the intervention group to that of those not receiving the TPS treatment at the same timepoints Both groups will be measured at baseline (T1), immediately after the intervention (T2) and at the 3-month follow-up (T3). Based on the previous studies, a 3-month follow-up is sufficient to assess the long-term sustainability of the TPS intervention.

Intervention (Transcranial Pulse Stimulation) Purpose of the intervention: The key tenets of the TPS intervention is neuromodulation, i.e., using ultrasound-based brain stimulation techniques to modulate the human brain in a focal and targeted manner. Intervention dose: Each participant should have the pre-treatment MRI scan performed in the University Research Facility in Behavioural and Systems Neuroscience, PolyU prior coming to the first intervention session. All participants (both TPS group and the waitlist control group) will receive six 30 minute-TPS sessions (300 pulse in each session, total: 1800 pulse) in 2 weeks' time (i.e., 3 sessions (Monday, Wednesday, Friday) per week, total: 3 hours). Participants will be followed up at 3-month period after the intervention (Fig 1). The investigators believe that a 2-week TPS intervention is sufficient enough to test the effects of TPS on depressive symptoms.

Being tested
Transcranial Pulse Stimulation
Keywords
efficacy, transcranial pulse stimulation
Medical subject headings
Depressive Disorder, Major

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Transcranial Pulse StimulationDevice

    A total of 30 participants (both TPS group and the waitlist control group) will receive six 30 minute-TPS sessions (300 pulse in each session, total: 1800 pulse) in 2 weeks' time (i.e., 3 sessions (Monday, Wednesday, Friday) per week, total: 3 hours), on a 1: 1 allocation ratio. Participants will be followed up at 3-month period after the intervention. A 2-week TPS intervention alongside with 3-month follow-up is sufficient enough to test the effects of TPS on depressive symptoms.

Study groups in NCT05006365
Study groupRoleWhat they receive
Transcranial Pulse StimulationExperimentalInvestigators will use a single-blind randomized controlled trial design with two-armed repeated measures. The trial design complies with the Consolidated Standards of Reporting Trials (CONSORT) statement. The first arm is the Intervention Group (Transcranial Pulse Stimulation) (TPS group)
Receives: Device: Transcranial Pulse Stimulation
Waitlist Control GroupActive comparatorSecond arm is the waitlist control group.
Receives: Device: Transcranial Pulse Stimulation

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Depression

    Hamilton Depression Rating Scale 17 (HAM-D-17) is a widely used reliable measurement. Scores range from 0 and 52, with higher scores indicating more severe depression.

    Measured: Participants will be measured the changes of HAM-D-17 scores at baseline, immediately after intervention and at 3-months follow-up

Secondary outcomes (4)
  1. Anhedonia

    The core symptom of depression will be assessed by the Chinese version of the Snaith-Hamilton Pleasure Scale (SHAPS). SHAPS is a self-report scale containing 14 items. Each item scores from 1 to 4. Total scores range from 14 to 56. A higher total SHAPS score indicates lower level of anhedonia.

    Measured: Participants will be measured the changes of SHAPS score at baseline, immediately after intervention and at 3-months follow-up

  2. Instrumental Activities of Daily Living (IADL)

    IADL will be assessed by the 8-item Hong Kong Chinese version of the Lawton Instrumental Activities of Daily Living Scale. Each item scores from 0 or 1. Total score ranges from 0-8. A lower score indicates a higher level of dependence.

    Measured: Participants will be measured the changes of IADL score at baseline, immediately after intervention and at 3-months follow-up

  3. Cognition

    Global cognition will be measured using the Hong Kong Chinese version of the Montreal Cognitive Assessment (MoCA). Montreal Cognitive Assessment is a 30-point scale, with points awarded differently depending on the type of question asked. A score between 26 to 30 indicate normal cognitive abilities. A score of 19 to 25 indicates mild cognitive impairment. Scores of between 11 and 21 suggest mild Alzheimer's disease.

    Measured: Participants will be measured the changes of the MoCA scores at baseline, immediately after intervention and at 3-months follow-up

  4. Neuroimaging

    Participants will receive pre and post treatment MRI scan to measure any changes in structural and functional connectivity changes in the brain.

    Measured: Participants will be measured the changes at baseline, immediately after intervention and at 3-months follow-up

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted16 Aug 2021
  2. Study start2 Aug 2021
  3. Primary completion31 May 2022
  4. Study completion28 Jan 2023

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Participant
Enrolment
30 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05006365
Sponsor's protocol ID
HongKongPU_HSEARS20210608002
Acronym
TPS
Status last verified
Sep 2024
First submitted
3 Aug 2021
Last updated
13 Mar 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Beisteiner R, Lozano AM. Transcranial Ultrasound Innovations Ready for Broad Clinical Application. Adv Sci (Weinh). 2020 Oct 27;7(23):2002026. doi: 10.1002/advs.202002026. eCollection 2020 Dec.

    PubMed 33304757
  • Hamilton M. Development of a rating scale for primary depressive illness. Br J Soc Clin Psychol. 1967 Dec;6(4):278-96. doi: 10.1111/j.2044-8260.1967.tb00530.x. No abstract available.

    PubMed 6080235
  • Schulz KF, Altman DG, Moher D; CONSORT Group. CONSORT 2010 Statement: Updated guidelines for reporting parallel group randomised trials. J Clin Epidemiol. 2010 Aug;63(8):834-40. doi: 10.1016/j.jclinepi.2010.02.005. Epub 2010 Mar 25. No abstract available.

    PubMed 20346629
  • Patterson B, Boyle MH, Kivlenieks M, Van Ameringen M. The use of waitlists as control conditions in anxiety disorders research. J Psychiatr Res. 2016 Dec;83:112-120. doi: 10.1016/j.jpsychires.2016.08.015. Epub 2016 Aug 21.

    PubMed 27585425
  • Liu WH, Wang LZ, Zhu YH, Li MH, Chan RC. Clinical utility of the Snaith-Hamilton-Pleasure scale in the Chinese settings. BMC Psychiatry. 2012 Oct 31;12:184. doi: 10.1186/1471-244X-12-184.

    PubMed 23110667
  • Yeung PY, Wong LLL, Chan CC, Yung CY, Leung LMJ, Tam YY, Tang LN, Li HS, Lau ML. Montreal Cognitive Assessment - Single Cutoff Achieves Screening Purpose. Neuropsychiatr Dis Treat. 2020 Nov 6;16:2681-2687. doi: 10.2147/NDT.S269243. eCollection 2020.

    PubMed 33192067
  • Graf C. The Lawton instrumental activities of daily living scale. Am J Nurs. 2008 Apr;108(4):52-62; quiz 62-3. doi: 10.1097/01.NAJ.0000314810.46029.74.

    PubMed 18367931
  • Cheung T, Ho YS, Yeung JW, Leung SF, Fong KNK, Fong T, Kranz GS, Beisteiner R, Cheng CPW. Effects of Transcranial Pulse Stimulation (TPS) on Young Adults With Symptom of Depression: A Pilot Randomised Controlled Trial Protocol. Front Neurol. 2022 Mar 25;13:861214. doi: 10.3389/fneur.2022.861214. eCollection 2022.

    PubMed 35401418

Questions about this trial

What is this clinical trial studying?

A study testing Transcranial Pulse Stimulation in people with Major Depressive Disorder, run by The Hong Kong Polytechnic University at 1 site in Hong Kong.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 13 Mar 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Hong Kong. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Depression (time frame: Participants will be measured the changes of HAM-D-17 scores at baseline, immediately after intervention and at 3-months follow-up). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05006365, which also lists 8 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Mar 2025.

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