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CompletedNCT04206384Updated Aug 23, 2021Results posted

Low-Frequency, High-Intensity Ultrasound for Waist Circumference Reduction

An interventional study of Ultrasound in Abdominal Subcutaneous Fat, sponsored by CAO Group, Inc.. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-08-23.

Sponsored by CAO Group, Inc. · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
52
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This study evaluates the effectiveness and safety of externally applied lower frequency ultrasound to the waist/abdominal region of adults to achieve a reduction of fat cells/tissues below the skin, evidenced by a reduction in patient waist circumference.

Read the detailed description

This study is to evaluate principally the effectiveness, and secondarily the safety, of external application of lower frequency ultrasound to the waist/abdominal region of adults to achieve a reduction of adipose cells/tissues in the subcutaneous region. The application of higher frequency (200kHz to 3MHz) ultrasound for this purpose has previously been demonstrated and such devices have received clearance for treatment in the United States. The question remains whether application of ultrasound at a lower frequency (35kHz to 45kHz) can achieve comparable results without introducing any new or elevated risks to the patient. This study will apply 3 treatments of the ultrasound energy and evaluate the change in patient's waist circumference, which would be evidence of reducing sub-cutaneous adipose cells/tissues.

02

Conditions studied

  • Abdominal Subcutaneous Fat

Keywords

  • Ultrasound
  • Low-Frequency
03

In context

Lead sponsor

CAO Group, Inc. is the lead sponsor of 2 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Age equal to or above 18
  • Body Mass Index ≥ 25.

Exclusion criteria

Exclusion Criteria:

  • Age equal to or below 17.
  • Body Mass Index \< 25.
  • Open sores, wounds, or otherwise compromised skin in the treatment area
  • History of keloid formation, hypertrophic scarring, or abnormal/delayed wound healing.
  • Known or suspected pregnancy, or active nursing.
  • General systemic conditions of arteriosclerosis, anemia, aortic aneurysm, or hypertension.
  • Liver conditions such as hyperlipidemia, hepatitis, liver disease, or abnormal liver function.
  • Diabetes or blood-glucose sensitivity
  • Any prior invasive cosmetic surgery to the waist or abdominal area, such as liposuction.
  • Hernias or diastasis recti within the treatment area.
  • Concurrent, or within the last 6 months, participation in any clinical trial for another device or drug.
  • Existing bacterial or viral infections (influenza, rhinovirus, hepatitis, pneumonia, tuberculosis, and the like)
  • Presence of acne vulgaris, herpes zoster, psoriasis vulgaris, or similar skin conditions in the treatment area.
  • Any type of cosmetic treatment to the target area within the last 6 months.
  • Implanted active medical device anywhere in the subject, or metallic or polymeric implants in the vicinity of the treatment area.
  • Currently undergoing, or recently underwent, chemotherapy or radiation treatment.
  • Per the investigator's discretion, any physical or mental condition which may compromise the patient's safety or welfare.
  • Failure to complete the study as outlined.
05

Study design

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

Study arms

  • Experimental
    Treatment group

    Each patient shall receive a total of 3 treatments. Each treatment shall consist of applying the ultrasound device for 30 minutes to the skin surface, working the device methodically over the abdominal area. The device shall be set at the maximum emission level, have an intensity of approximately 1.0 watt/cm\^2.

    Device: Ultrasound

Interventions

  • DeviceUltrasound

    Ultimate Contour Body Sculpting Device

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What researchers measure

Primary outcomes

  1. Waist Circumference Change

    Change in measurable circumference of the patient's abdominal area from Baseline to immediately after the 4-week follow-up assessment (approximately 6 weeks from Baseline).

    Time frame: The difference between the circumference measurement immediately prior to the first treatment (Baseline) to immediately after the 4-week follow-up assessment (approximately 6 weeks from Baseline).

Secondary outcomes

  1. Number of Participants With Pain

    Incidence of pain during each application of the device and/or immediately following each application of the device (up to 15 minutes after use of the device ceased).

    Time frame: Assessed during and immediately after (up to 15 minutes after use ceased) each application of the device, and at 1 week, 4 weeks, and 12 weeks post-treatment.

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Results

Posted Aug 20, 2021
Limitations and caveats
Due to the coronavirus (COVID-19) pandemic, the planned 12-week follow-up was conducted virtually. This prevented capture of the primary measurement at this timepoint.

Participant flow

Participant flow — Overall Study
MilestoneTreatment Group
Started52
Completed42
Not completed10
Withdrew: Withdrawal by subject8
Withdrew: Adverse event2

Outcome measures

PrimaryWaist Circumference Change

Change in measurable circumference of the patient's abdominal area from Baseline to immediately after the 4-week follow-up assessment (approximately 6 weeks from Baseline).

Time frame:
The difference between the circumference measurement immediately prior to the first treatment (Baseline) to immediately after the 4-week follow-up assessment (approximately 6 weeks from Baseline).
Reported as:
Mean · Inches
Waist Circumference Change
InchesTreatment Group
Waist Circumference Change-2.03 ± 0.77
SecondaryNumber of Participants With Pain

Incidence of pain during each application of the device and/or immediately following each application of the device (up to 15 minutes after use of the device ceased).

Time frame:
Assessed during and immediately after (up to 15 minutes after use ceased) each application of the device, and at 1 week, 4 weeks, and 12 weeks post-treatment.
Reported as:
Number · participants
Number of Participants With Pain
participantsTreatment Group
Number of Participants With Pain3

Adverse events

Collected over Collection and follow-up occurred over a space of up to 8 weeks.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Treatment Group0/52 (0%)0/52 (0%)17/52 (32.7%)
Most frequent other events
Most frequent other events
EventTreatment Group
Ringing in the earsEar and labyrinth disorders7/52
Inflammation / Heat SensationSkin and subcutaneous tissue disorders5/52
Skin RashSkin and subcutaneous tissue disorders1/52
ConstipationGastrointestinal disorders1/52
Fatty UrineRenal and urinary disorders1/52
VertigoEar and labyrinth disorders1/52
HeadacheNervous system disorders1/52

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Treatment Group
<=18 years0
Between 18 and 65 years50
>=65 years2
Sex: Female, Male
Sex: Female, Male(Participants)Treatment Group
Female42
Male10
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Treatment Group
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American0
White40
More than one race5
Unknown or Not Reported7
Region of Enrollment
Region of Enrollment(participants)Treatment Group
United States52
Waist Circumference
Waist Circumference(Inches)Treatment Group
Mean40.95 ± 5.32
Body Mass Index
Body Mass Index(kg/m2)Treatment Group
Mean29.36 ± 4.23
08

Study locations

1 site
  • Just the Right Cruves
    Midvale, Utah 84047, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Oct 10, 2019
  • Informed consent form · Oct 30, 2019

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 23, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04206384
Lead sponsor
CAO Group, Inc.
Responsible party
Sponsor
First posted
Dec 20, 2019
Start date
Dec 2, 2019
Primary completion
May 1, 2020
Completion
May 12, 2020
Results posted
Aug 20, 2021
Last update
Aug 23, 2021

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

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

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