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CompletedNCT05628688VOLGAUpdated Dec 12, 2025

A Non-randomized, Open-Label Study to Evaluate the Safety and Effectiveness of Insight® Pro Device for Evaluating Lymphatic and Venous Disorders (VOLGA)

An observational study in Lymphedema, Chronic Venous Insufficiency and Edema, sponsored by Koya Medical, Inc.. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-12-12.

Sponsored by Koya Medical, Inc. · Observational

Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
67
Ages
18 Years and older
Sex
All
01

Study summary

To demonstrate that the Insight Pro Device is safe and effective for use in detecting lymphatic and venous disorders.

Read the detailed description

6. Clinical Hypotheses

  1. The Insight Pro device can detect a difference in extracellular fluid volume through bioimpedance and dielectric constant measurement.
  2. The Insight Pro device can detect a difference in skin hardness or fibrositis through a durometer measurement.
  3. The Insight Pro device is safe for use as assessed by adverse events.
02

Conditions studied

  • Lymphedema
  • Chronic Venous Insufficiency
  • Edema
  • Venous Insufficiency of Leg

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03

In context

Lymphedema

560 studies on the registry are indexed under Lymphedema; 135 are open to participants now.

This study's enrollment of 67 is below the median of 106 across 144 observational studies indexed under Lymphedema.

Browse Lymphedema studies →

Lead sponsor

Koya Medical, Inc. is the lead sponsor of 6 studies on the registry; 1 is 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
Sampling method
Non-probability sample

Study population

(Test Group) - Up to 50 subjects will be enrolled with unilateral or bilateral edema in the upper or lower extremity.

(Control Group) Up to 50 patients will be enrolled from a healthy volunteer group as a control, with no edema.

Inclusion criteria

Test group -

  • Males and females ≥ 18 years of age
  • Willing to sign the informed consent and deemed capable of following the study protocol
  • Subjects must have primary or secondary unilateral or bilateral upper or lower extremity edema
  • At the time of initial evaluation, individuals must be at least 3 months post-surgery, chemotherapy and/or radiation treatment for cancer if applicable

Control group -

  • Males and females ≥ 18 years of age
  • Willing to sign the informed consent and deemed capable of following the study protocol
  • Subjects must not have primary or secondary edema and self-describe general healthy

Exclusion criteria

Exclusion Criteria:

  • ● Inability or unwillingness to participate in all aspects of the study protocol and/or failure to provide informed consent

    • Patients with exam results that would prevent safe and effective use of the study device (cellulitis, open-wounds, healing-wounds, etc.)
    • Diagnosis of active or recurrent cancer (\< 3 months since completion of chemotherapy, radiation therapy, or primary surgery for the cancer)
    • Patients with cardiac arrhythmia with pacemakers or other implanted electronic equipment
    • Patients must not have implanted metal hardware in the limbs
    • Patients undergoing external defibrillation
    • Diagnosis of Acute infection (in the last four weeks)
    • Diagnosis of acute thrombophlebitis (in last 2 months)
    • Diagnosis of pulmonary embolism or deep vein thrombosis within the previous 2 months
    • Diagnosis of congestive heart failure (uncontrolled)
    • Diagnosis of chronic kidney disease with acute renal failure
    • Women who are pregnant, planning a pregnancy or nursing at study entry
    • Participation in any clinical trial of an investigational substance or device during the past 30 days
05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
67 participants (actual)
Patient registry
No

Groups and cohorts

  • Test group

    Up to 50 subjects will be enrolled with unilateral or bilateral edema in the upper or lower extremity.

    Diagnostic Test: Insight Pro Device for Diagnosis

  • Control group

    Up to 50 patients will be enrolled from a healthy volunteer group as a control, with no edema.

    Diagnostic Test: Insight Pro Device for Diagnosis

Interventions

  • Diagnostic testInsight Pro Device for Diagnosis

    Insight Pro Device for Diagnosis of Lymphatic and Venous Disorders

06

What researchers measure

Primary outcomes

  1. Edema Volume

    Edema Volume detection by difference in extracellular fluid volume through bioimpedance and dielectric constant measurement.

    Time frame: Acute - At day 0

  2. Fibrosis

    Durometer detection or Skin hardness (fibrosis) difference through a durometer measurement.

    Time frame: Acute - At day 0

Secondary outcomes

  1. Safety/AEs

    Safety during use (via adverse event reporting)

    Time frame: Acute - At day 0

  2. LymVAS

    Correlation with quality-of-life objective parameters using a lymphedema visual analog scale

    Time frame: Acute - At day 0

07

Study locations

1 site
  • Koya Medical, Inc.
    Oakland, California 94607, United States
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 12, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05628688
Lead sponsor
Koya Medical, Inc.
Responsible party
Sponsor
First posted
Nov 29, 2022
Start date
Aug 8, 2023
Primary completion
Aug 28, 2024
Completion
Dec 4, 2025
Last update
Dec 12, 2025

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 Dec 2025. You cannot join it, but the record below documents what was studied.

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