Blinded Consumer Study for the Evaluation of the Usability and Efficacy of One Medical Device in Venous Return

NCT07234240 | Completed DMC

• 1 other identifier: P023B24
• Study Type: interventional
• Target: 54
• Locations: 1 country
• Sites: 1

Brief Summary

The primary goal of this study was to assess, in vivo, the efficacy of the medical device Invisible insoles LIGHT LEGS in improving venous return in subjects affected by this problem after 14 days of medical device use, by self-assessment, filling in questions regarding Quality of Life, in comparison to the baseline. The secondary goals of this study were (1) to assess in vivo the perception of subjects about the rapid relief felt after 7 days of using the same medical device, by selfassessment, filling-in three subjective evaluation questions, and (2) to assess in vivo the usability of the subjects regarding the same medical device after 14 days of its use, by self-assessment, filling in subjective evaluation questions.

Conditions

Venous Disease; Quality of Life; Symptoms and Signs

Keywords

Chronic venous disease; insoles; quality of life; symptoms; relief

Outcome Measures

Primary Outcomes (1)

• Quality of Life

  CIVIQ (ChronIc Venous Insufficiency Quality of Life Questionnaire) 20 : It is a quality of life assessment scale comprising 20 items grouped into four main dimensions (pain, physical, psychological, social) with 5 levels (0 point (min) to 4 points (max)).The final score is between 0 and 80 points. A low score indicates a low impact of the disease on quality of life.

  Day 0 and Day 14

Secondary Outcomes (2)

• Rapid relief

  Day 7

• Usability evaluation

  Day 14

Study Arms (1)

Experimental: One medical device as investigational device

EXPERIMENTAL

Device: Insoles

Interventions

Insoles DEVICE

Insoles At Day 0, the patient received the insoles and adapted them to his open shoes. The patient filled the quality-of-life's questionnaire at Day 0 and the same at Day14. The patient filled the rapid relief's questionnaire at Day7 and a usability's questionnaire at Day14.

Experimental: One medical device as investigational device

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Gender: Female/Male;
• Age: with 18 years old and older;
• Having signed an Informed Consent Form (ICF);
• Willingness, ability and likeliness to comply with all the study procedures and restrictions;
• Ability to give informed consent;
• Available during the entire study period;
• Understanding Portuguese language: Portuguese-speaking subjects capable of reading the documents;
• Affected by a symptomatic venous return problem;
• With a score \>14 from the question 1 to 11 of the adapted CIVIQ questionnaire (each question scored on a scale from 0 to 4);
• Agree to wear open shoes suitable for insoles throughout the study, for at least 8 hours per day (with a heel \<5cm);
• Having a shoe size of 36 to 41;

You may not qualify if:

• Known allergy or known history of hypersensitivity to the components of the investigational device and related compounds;
• Currently participating in another clinical study that may interfere with the study;
• Diagnosed skin diseases and/or cutaneous alterations on the test region (feet) that may impair the study (for example tattoos, marks, burns, scars, etc.);
• Diagnosed diseases that may impair the study (including but not limited to: Diabetes, Arteritis, Phlebitis, etc);
• Under pharmacological treatments on the 30 days previous to the beginning of the study and during the entire period of the study that may impair it (including but not limited to: inflammatory drugs, any drug that might cover the signs and symptoms, drugs with arterial or venous indications, etc.);
• Having applied any type of topical product (pharmaceutical, cosmetic or other) with similar effect of the medical device under study, on the test region (feet) during the study, besides the investigational device;
• Having a stage of CVD C3 on the CEAP classification;
• Having had a traumatic or neurological history in the last 6 months;
• Wearing an orthopaedic insole made by a health professional;
• Having a significant and disabling lower limb pain;
• Having a significant and disabling back pain;
• Having a contraindication to wearing insoles and open shoes;
• Wearing open shoes with an anatomical shape (e.g. Birkenstock);
• Pregnancy or intention to conceive during the study;
• Breast-feeding.

Sponsors & Collaborators

• Millet Innovation: lead

Study Sites (1)

Juliana Gouveia

Porto, Portugal

Location

MeSH Terms

Conditions

Signs and Symptoms

Interventions

Foot Orthoses

Condition Hierarchy (Ancestors)

Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Orthotic Devices; Orthopedic Equipment; Surgical Equipment; Equipment and Supplies

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 14, 2025
• First Posted: November 18, 2025
• Study Start: August 5, 2025
• Primary Completion: September 11, 2025
• Study Completion: September 11, 2025
• Last Updated: November 18, 2025

Record last verified: 2025-11

Data Sharing

• IPD Sharing: Will not share

Locations

PT (1)