ClinicalTrials.gg
CompletedNCT03543085Updated Oct 13, 2021Results posted

Ultra-high Frequency (500 KHz) Spinal Cord Stimulation for Treatment of Chronic Back Pain or Lower Limb Pain

An interventional study of GiMer Medical MN 1000 External Stimulator in Pain, Chronic, Pain, Back and Pain, Radiating, sponsored by GiMer Medical. Completed at 1 site in Taiwan. Open to participants aged 20 Years to 75 Years. Per ClinicalTrials.gov, last updated 2021-10-13.

Sponsored by GiMer Medical · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
10
Allocation
Not applicable
Ages
20 Years to 75 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 23 studies in Chronic Pain with a site in Taiwan — 3 open to participants now, 4 under way, none of them phase 3. Chronic Pain · Taiwan.

Enrollment
20th of 20
10 · median 67
Started
2018
the only one that year
No phase
14 of 23
3 open now
Registered
5th of 23
by date
Lead sponsor
2 of 23
GiMer Medical

Among the 23 studies in Chronic Pain with a site in Taiwan, this one is the 20th largest by enrollment of the 20 interventional ones that give a count, is the only one that started in 2018, is one of 14 with no phase, and was the 5th registered.

Chronic Pain

3,227 studies on the registry are indexed under Chronic Pain; 728 are open to participants now.

Browse Chronic Pain studies →

Open to participants now

3 of the 23 studies in Chronic Pain with a site in Taiwan are open now. Recruiting first, the newest first:

All 3 open studies →

A study can be open while its sites in Taiwan have not opened yet or have stopped. Only those recruiting at a site in Taiwan →

Who these studies take

Of the 486 Chronic Pain studies recruiting now, 239 (49%) set no upper age limit and 173 (36%) stop at 75 or younger; 43 take children under 18; 64 take healthy volunteers.

This study: 20 Years to 75 Years · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 23 studies in Chronic Pain with a site in Taiwan, or all of them as a file.
02

Study summary

This study is a prospective, single-arm, open label, single center to confirm the effectiveness and safety of an ultra-high frequency (500 KHz) spinal cord stimulation in patients with chronic back pain or lower limb pain.

Read the detailed description

This study is a prospective, single-arm, open label, single center to confirm the effectiveness and safety of an ultra-high frequency (500 KHz) spinal cord stimulation in patients with chronic back pain or lower limb pain. The trial length is 14 days. Patients will be given ultrahigh frequency pulse stimulation, up to 3 times in every 24 hours, and VAS will be obtained at least once a day. Compared to previous study conducted last year, patient can now have two lead implant sites for different pain locations. The electrode implantation site will be epidural space instead of Dorsal Root Ganglion (DRG).

03

Conditions studied

  • Pain, Chronic
  • Pain, Back
  • Pain, Radiating
04

Who can participate

Ages eligible
20 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Age ≧20 and ≦75
  2. Have a symptom of back or lower limb pain with a diagnosis related to spinal lesion, herniated disc, nerve injury, stenosis, failed back surgery syndrome (FBSS), complex regional pain syndrome (CRPS) or ischemic lower limb pain and have pain history of >6 months.
  3. Have an average pain score >5 by Visual Analogue Scale (VAS) on inclusion.
  4. Has failed to achieve adequate pain relief from prior pharmacologic treatments.
  5. In the judgement of the investigator, the subject is an appropriate candidate for the trial procedure.
  6. The subject is willing and able to comply with the procedure and requirements of this trial.
  7. The participant is able to understand and provide , and has signed their written informed consent in accordance with Institutional Review Board (IRB) requirements.

Exclusion criteria

Exclusion Criteria:

  1. Have evidence of a mental or psychological condition that affects pain perception and has difficulty/disability performing objective pain assessment, or have previously failed mental or psychological assessments administered by a psychiatrist that may be deemed to indicate the subject's lack of suitability for participation in this study.
  2. Subject has exhibited unstable pain condition within the past 30 days as interviewed by Investigator.
  3. Be on anticoagulant medication with (INR) >1.5 or count less than 100,000/μL, peripheral vascular diseases (PVDs), visceral pain or uncontrolled Diabetes mellitus (DM).
  4. Has had therapy at an intended site of stimulation within the past 30 days.
  5. Pain medication(s) dosages(s) are not stable for at least 30 days at investigator's discretion.
  6. Currently has an active implantable device including International Classification of Diseases (ICD), pacemaker, spinal cord stimulator or intrathecal drug pump or subject requires magnetic resonance imaging (MRIs) or diathermy.
  7. Have a current diagnosis of cancer with active symptoms.
  8. Have a known terminal illness with less than one year.
  9. Have a systematic or local infection, which may increase study risk.
  10. Currently has an indwelling device that may pose an increased risk of infection.
  11. Be pregnant or breast feeding.
  12. Have a medical history of drug or alcohol addiction within the past 2 years.
  13. Participation in any study in the last 30 days or current enrollment in any trial.
  14. Be currently involved in an injury claim law suit or medically related litigation, including workers compensation.
  15. Be a prisoner.
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
10 participants (actual)

Study arms

  • Experimental
    Ultrahigh Frequency (500 KHz) Stimulation

    This study is a prospective, single-arm, open label, single center to confirm the effectiveness and safety of an ultrahigh frequency spinal cord stimulation in patients with chronic back pain or lower limb pain.

    Device: GiMer Medical MN 1000 External Stimulator

Interventions

  • DeviceGiMer Medical MN 1000 External Stimulator

    Trial stimulator (GiMer Medical Model 1000 External Stimulator) to generate pulsed ultrahigh frequency (\>200KHz) electrical stimulation, delivered via lead in epidural space, in treating pain. Similar with current market available Spinal Cord Stimulators but with a higher stimulation frequency (hundred KHz) range.

06

What researchers measure

Primary outcomes

  1. Change in Visual Analog Score From Baseline to Day 14

    To assess the analgesic effectiveness of ultra-high frequency spinal cord stimulation, as measured by Visual Analogue Scale (VAS, score min 0 no pain to max 10 worst pain) compared to baseline.

    Time frame: 14 days

  2. Record Incidence of Adverse Events

    To evaluate safety of ultra-high frequency spinal cord stimulation by identifying the incidence rate of adverse events (AEs) and serious adverse events (SAEs) during the trial

    Time frame: 14 days

Secondary outcomes

  1. The Brief Pain Inventory (BPI)

    The change from baseline in functionality using the BPI evaluations

    Time frame: 14 days

  2. Incidence of Stimulation-induced Paresthesia

    To determine the presence or absence of stimulation-induced paresthesia.

    Time frame: 14 days

  3. Pain Relief Medication Consumption

    Amount of pain medication consumption, including Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) and weak opioids, compared to baseline

    Time frame: 14 days

  4. Oswestry Low Back Pain Disability Questionnaire (ODI)

    The change from baseline in functionality using the ODI evaluations

    Time frame: 14 days

07

Results

Posted Oct 13, 2021

Participant flow

Participant flow — Overall Study
MilestoneUltrahigh Frequency (500 KHz) Stimulation
Started10
Completed10
Not completed0

Outcome measures

PrimaryChange in Visual Analog Score From Baseline to Day 14

To assess the analgesic effectiveness of ultra-high frequency spinal cord stimulation, as measured by Visual Analogue Scale (VAS, score min 0 no pain to max 10 worst pain) compared to baseline.

Time frame:
14 days
Reported as:
Mean · score on a scale
Change in Visual Analog Score From Baseline to Day 14
score on a scaleUltrahigh Frequency (500 KHz) Stimulation
Change in Visual Analog Score From Baseline to Day 14-5.1 ± 2.3
PrimaryRecord Incidence of Adverse Events

To evaluate safety of ultra-high frequency spinal cord stimulation by identifying the incidence rate of adverse events (AEs) and serious adverse events (SAEs) during the trial

Time frame:
14 days
Reported as:
Number · events
Record Incidence of Adverse Events
eventsUltrahigh Frequency (500 KHz) Stimulation
Record Incidence of Adverse Events16
SecondaryThe Brief Pain Inventory (BPI)

The change from baseline in functionality using the BPI evaluations

Time frame:
14 days

Results for this outcome have not been posted.

SecondaryIncidence of Stimulation-induced Paresthesia

To determine the presence or absence of stimulation-induced paresthesia.

Time frame:
14 days

Results for this outcome have not been posted.

SecondaryPain Relief Medication Consumption

Amount of pain medication consumption, including Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) and weak opioids, compared to baseline

Time frame:
14 days

Results for this outcome have not been posted.

SecondaryOswestry Low Back Pain Disability Questionnaire (ODI)

The change from baseline in functionality using the ODI evaluations

Time frame:
14 days

Results for this outcome have not been posted.

Adverse events

Collected over 14 days from baseline. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Ultrahigh Frequency (500 KHz) Stimulation0/10 (0%)0/10 (0%)9/10 (90%)
Most frequent other events
Most frequent other events
EventUltrahigh Frequency (500 KHz) Stimulation
Incision site painInjury, poisoning and procedural complications7/10
weaknessMusculoskeletal and connective tissue disorders3/10
painMusculoskeletal and connective tissue disorders2/10
headacheNervous system disorders1/10
ConstipationGastrointestinal disorders1/10
InsomniaPsychiatric disorders1/10
Dermatitis contactSkin and subcutaneous tissue disorders1/10

Baseline characteristics

Age, Continuous
Age, Continuous(years)Ultrahigh Frequency (500 KHz) Stimulation
Mean43.5 (24.9 to 65.9)
Sex: Female, Male
Sex: Female, Male(Participants)Ultrahigh Frequency (500 KHz) Stimulation
Female5
Male5
Race and Ethnicity Not Collected
Race and Ethnicity Not Collected(Participants)Ultrahigh Frequency (500 KHz) Stimulation
08

Study locations

1 site
  • China Medical University Hospital
    Taichung, Taiwan
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Apr 2018 to primary completion in Oct 2018, 6 months.

Results were first posted in Oct 2021, 2 years 11 months after primary completion.

Of 83 industry-sponsored interventional studies with no phase under Chronic Pain, half reached primary completion within 21 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 30. This study's 6 months is below that.

Counting every sponsor, half of 1,378 studies reached it within 20 months; a quarter within 9 and three quarters within 38.

How these figures are worked out, and which studies are left out of them.

Registered
May 18, 2018
First posted
Jun 1, 2018
StartActual
Apr 12, 2018
Primary completionActual
Oct 23, 2018
CompletionActual
Oct 23, 2018
Results first posted
Oct 13, 2021
Last update
Oct 13, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Oct 13, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03543085
Lead sponsor
GiMer Medical
Responsible party
Sponsor
First posted
Jun 1, 2018
Start date
Apr 12, 2018
Primary completion
Oct 23, 2018
Completion
Oct 23, 2018
Results posted
Oct 13, 2021
Last update
Oct 13, 2021

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2021. You cannot join it, but the record below documents what was studied.

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