Clinical Evaluation of Linear Z for Body Contouring

Prospective, Single-center, Single-arm Clinical Research Evaluating the Safety and Effectiveness of Linear Z for Non-invasive Body Contouring of the Abdomen and Flanks

This clinical study will evaluate the safety and effectiveness of LinearZ, a non-invasive focused ultrasound device, for body contouring of the lower abdomen and flanks.

Approximately 30 adults with localized fat in the abdomen and flanks will participate in the study. Each participant will receive one treatment with LinearZ to the lower abdomen and flanks and will be followed for approximately 90 days.

The main purpose of the study is to determine whether treatment with LinearZ reduces the circumference of the treated area 90 days after treatment. The study will also evaluate changes in body circumference at Day 30, changes in body contour and appearance, participant satisfaction, body weight, body mass index (BMI), and body composition. Standardized photographs and three-dimensional images will also be used to assess changes in the treated areas.

The safety and tolerability of the treatment will be evaluated throughout the study by monitoring adverse events and treatment-related pain or discomfort.

Study Overview

• Status: Recruiting
• Conditions: Non Invasive Body Contouring
• Intervention / Treatment: Device: High Intensity Focused Ultrasound

Detailed Description

This is a prospective, single-center, single-arm, open-label clinical study designed to evaluate the safety and effectiveness of LinearZ for non-invasive body contouring of the lower abdomen and flanks.

Approximately 30 eligible adult participants with localized, visible, and measurable subcutaneous adiposity of the abdomen and flanks will be enrolled. All eligible participants will receive a single treatment with LinearZ to the lower abdomen and bilateral flanks. There is no randomization or comparator group in this study.

LinearZ is a focused ultrasound device designed to deliver ultrasound energy at specific depths within subcutaneous tissue for non-invasive body contouring. Treatment will be performed according to predefined study procedures and sponsor-approved treatment instructions. Treatment parameters, including the treatment area, cartridge type, treatment depth, energy level, and number of treatment lines or shots, will be documented.

Participants will undergo screening and baseline assessments before treatment and will return for follow-up assessments approximately 30 and 90 days after treatment.

The primary effectiveness assessment is the change from baseline in the circumference of the treated area at Day 90. Circumference measurements will be performed using standardized procedures at predefined anatomical landmarks.

Additional effectiveness assessments include change in circumference at Day 30, aesthetic improvement, participant satisfaction, changes in body weight and body mass index (BMI), and changes in body composition. Standardized clinical photography and three-dimensional imaging will also be used to document and evaluate changes in body contour. Independent blinded evaluators will review standardized images to help minimize assessment bias.

Safety and tolerability will be evaluated throughout the study by monitoring treatment-emergent adverse events, device-related adverse events, serious adverse events, and treatment-related pain or discomfort. Immediate post-treatment skin reactions and other local responses will also be assessed.

Each participant will participate in the study for approximately 90 days from the day of treatment.

• Study Type: Interventional
• Enrollment (Estimated): 30
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Narendra Kumar, Dr., PhD; Phone Number: +65 9238 3614; Email: narendrakumar@jeisys.com

Study Locations

• Mexico
  • Monterrey
    • Nuevo León, Monterrey, Mexico, 64060
      • Recruiting
      • Especialistas de la Piel y Cirugía, S.C.
      • Contact: Hector Leal Leal, Dr.; Phone Number: +528119655342; Email: hleal@iderma.org

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Adults aged 18 to 65 years.
• Participants of either sex.
• Body mass index (BMI) greater than 20 kg/m².
• Presence of localized, visible, and measurable subcutaneous adiposity of the abdomen and flanks considered adequate for non-invasive body contouring by the investigator.
• Minimum subcutaneous fat thickness of 30 mm, assessed clinically or by caliper/ultrasound.
• Stable body weight (±3 kg) for the past 3 months.
• Willingness to maintain stable diet and exercise habits during study participation.
• Ability to comply with study requirements.
• Provision of written informed consent.
• Compliance with other clinical criteria defined for the study.

Exclusion Criteria:

• Pregnancy or breastfeeding.
• Women planning pregnancy during study participation.
• Previous body contouring procedures in the treatment area within the past 6 months.
• Moderate to severe skin laxity in the treatment area that, in the investigator's judgment, is likely to interfere with assessment of body-contouring results.
• Active dermatologic conditions or infections.
• Implanted electronic devices, such as a pacemaker or implanted defibrillator.
• Coagulation disorders.
• Use of anticoagulant therapy.
• Severe uncontrolled systemic disease.
• Participation in another clinical investigation within the previous 30 days.
• Any contraindication listed in the device manual.
• Hernia in the treatment area.
• Metal implants in the treatment area.
• Significant open scars, tattoos, or wounds in the treatment area.
• Altered sensation or neuropathy.
• Active malignancy.
• History of keloid formation or poor wound healing.
• Use of weight-loss medications or GLP-1 agonists within the previous 3 months.
• Previous liposuction or surgery in the treatment area within the previous 12 months.
• Psychiatric conditions that affect the ability to provide informed consent or that affect body-image perception.
• Women of childbearing potential who are unwilling to use medically acceptable contraception during study participation.
• Any participant who, in the investigator's opinion, is not suitable for participation or is unlikely to comply with study procedures or complete the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: A single-arm study where subjects will receive HIFU for non invasive body contouring; Participants will receive a single treatment with the LinearZ focused ultrasound device for non-invasive body contouring of the lower abdomen and bilateral flanks. Treatment will be performed according to the predefined study treatment parameters. Participants will be followed for approximately 90 days after treatment to evaluate the safety and effectiveness of the treatment.

Device: High Intensity Focused Ultrasound; Participants will receive a single treatment with the LinearZ focused ultrasound device for non-invasive body contouring of the lower abdomen and bilateral flanks. The device delivers focused ultrasound energy at specific depths within the subcutaneous tissue. Treatment will be performed according to the sponsor-approved treatment manual, site-specific operating procedures, and study procedures. All participants will receive treatment to both the lower abdomen and flanks during the treatment session and will be followed for approximately 90 days after treatment.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change From Baseline in Circumference of the Target Area at Day 90	The change in circumference of the treated target area from baseline to Day 90 will be assessed using standardized circumference measurements. The target area includes the lower abdomen and bilateral flanks. Circumference will be measured at a predefined and documented anatomical level using a standardized procedure, and the average of three consecutive measurements will be used for analysis.	Baseline to day 90

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change From Baseline in Circumference of the Target Area at Day 30	Change in circumference of the treated target area from baseline to Day 30 will be assessed using standardized circumference measurements at predefined anatomical points encompassing the lower abdomen and bilateral flanks. The average of three consecutive measurements will be used for analysis.	Baseline to Day 30
Proportion of Participants Achieving ≥5 cm Reduction in Circumference at Day 90	Percentage of participants who achieve a reduction of at least 5 cm in circumference of the treated target area compared with baseline.	Baseline to Day 90
Proportion of Participants Achieving ≥10 cm Reduction in Circumference at Day 90	Percentage of participants who achieve a reduction of at least 10 cm in circumference of the treated target area compared with baseline.	Baseline to day 90
Global Aesthetic Improvement Scale (GAIS) Score	Aesthetic improvement of the treated area will be assessed using the Global Aesthetic Improvement Scale (GAIS) at follow-up visits.	Day 30 and Day 90
Blinded Independent Photographic Evaluation of Aesthetic Improvement	Independent blinded evaluators will assess aesthetic improvement using standardized photographs obtained at baseline and follow-up visits.	Baseline, Day 30 and Day 90
Participant Satisfaction With Treatment Outcome	Participant satisfaction with the treatment outcome will be assessed using the study-specified satisfaction questionnaire.	Day 30 and Day 90
Change From Baseline in Body Weight	Change in participant body weight from baseline will be assessed at follow-up visits.	Baseline to Day 30 and Day 90
Change From Baseline in Body Mass Index (BMI)	Change in BMI from baseline will be assessed at follow-up visits. BMI is expressed in kg/m².	Baseline to Day 30 and Day 90
Change From Baseline in Fat Mass and Fat-Free Mass	Change in fat mass and fat-free mass from baseline will be assessed using the InBody body composition measurement system.	Baseline to Day 30 and Day 90
Procedural Pain and Discomfort Score Using an 11-Point Numeric Rating Scale	Procedural pain associated with radiofrequency treatment will be assessed using an 11-point Numeric Rating Scale ranging from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. Higher scores indicate greater procedural pain.	Immediately after each treatment.

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Treatment-Emergent Adverse Events	Treatment-emergent adverse events will be monitored from the treatment procedure through the final follow-up visit. Adverse events will be assessed for severity and relationship to the study device/procedure in accordance with the study protocol.	From treatment through Day 90

Collaborators and Investigators

• Sponsor: Jeisys Medical Inc

Study record dates

Study Major Dates

• Study Start (Estimated): September 1, 2026
• Primary Completion (Estimated): December 20, 2026
• Study Completion (Estimated): December 31, 2026

Study Registration Dates

• First Submitted: August 27, 2026
• First Submitted That Met QC Criteria: September 1, 2026
• First Posted (Actual): September 3, 2026

Study Record Updates

• Last Update Posted (Actual): September 3, 2026
• Last Update Submitted That Met QC Criteria: September 1, 2026
• Last Verified: September 1, 2026

More Information

Terms related to this study

• Keywords: Fat Reduction; Body contouring; Localized Adiposity; High-Intensity Focused Ultrasound; HIFU; Non-invasive Body Contouring
• Other Study ID Numbers: LIN-BD-01-2026

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No