FlowMet-R Blood Flow Measurement for the Diagnosis of Peripheral Artery Disease and Critical Limb Ischemia

NCT ID: NCT04120610

Last Updated: 2025-04-11

Study Results

Results available

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Basic Information

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Recruitment Status

TERMINATED

Total Enrollment

195 participants

Study Classification

OBSERVATIONAL

Study Start Date

2019-12-09

Study Completion Date

2022-11-21

Brief Summary

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Non-randomized, multi-center, longitudinal study of healthy subjects and subjects with PAD who are scheduled for ABI, TBI, and either Duplex Ultrasound or Angiographic assessments in a vascular clinic.

Detailed Description

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Patients scheduled for peripheral vascular examination and healthy controls will be measured with the FlowMet-R, a noninvasive blood flow monitor, and compared to gold standard diagnostics - ABI, TBI, and Doppler Ultrasound. Sensitivity and specificity of the FlowMet-R device output in diagnosing PAD and CLI will be assessed on initial visit, 3-month followup, and 6-month followup.

Conditions

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Peripheral Artery Disease

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Healthy

Healthy cohort is an age-matched population (over 40 years old) without history of PAD or suspected PAD. Healthy cohort will receive FlowMet-R measurement, Ankle Brachial Index (ABI), and Toe Brachial Index (TBI) measurements.

FlowMet-R

Intervention Type DIAGNOSTIC_TEST

FlowMet-R is a noninvasive blood flow measurement.

ABI

Intervention Type DIAGNOSTIC_TEST

Ankle Brachial Index is a ratio-metric blood pressure measurement in the ankle and arm.

TBI

Intervention Type DIAGNOSTIC_TEST

Ankle Brachial Index is a ratio-metric blood pressure measurement in the toe and arm.

Peripheral Artery Disease

PAD cohort is all-comers to the vascular lab that are scheduled to undergo assessment for Peripheral Artery Disease (PAD) or have a planned endovascular or surgical intervention to address PAD and will receive FlowMet-R measurement in addition to their routine standard of care.

FlowMet-R

Intervention Type DIAGNOSTIC_TEST

FlowMet-R is a noninvasive blood flow measurement.

ABI

Intervention Type DIAGNOSTIC_TEST

Ankle Brachial Index is a ratio-metric blood pressure measurement in the ankle and arm.

TBI

Intervention Type DIAGNOSTIC_TEST

Ankle Brachial Index is a ratio-metric blood pressure measurement in the toe and arm.

Interventions

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FlowMet-R

FlowMet-R is a noninvasive blood flow measurement.

Intervention Type DIAGNOSTIC_TEST

ABI

Ankle Brachial Index is a ratio-metric blood pressure measurement in the ankle and arm.

Intervention Type DIAGNOSTIC_TEST

TBI

Ankle Brachial Index is a ratio-metric blood pressure measurement in the toe and arm.

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

PAD Positive Cohort

* Subject meets PAD positive criteria
* Subject is willing and able to provide informed consent
* Subject is willing and able to comply with study procedures
* Subject is able to understand the study procedures
* Subject is scheduled for vascular examination that includes noninvasive assessments as standard of care: ABI, TBI, and either a Duplex Ultrasound or Angiogram

Healthy Cohort

* Subject is willing and able to provide informed consent.
* Subject is willing and able to comply with the study procedures.
* Subject is able to understand the study procedures.
* Subject has no history of positive PAD diagnosis, and is not currently suspected of having PAD.

Exclusion Criteria

PAD Positive Cohort

* Subject is under 40 or unable to consent.
* Subject has any medical condition, which, in the judgment of the Investigator and/or designee, makes the subject a poor candidate for the investigational study.
* Subject is excluded from analysis if no stenosis is found during Doppler but Tibial disease is suspected and Tibial ultrasound is not able to be performed.
* Subject does not have a suitable finger to attach the FlowMet-R probe.
* Subject does not have a suitable 1st or 2nd digit to attach FlowMet-R probe on the limb of interest.
* Subject has undergone revascularization within the last 90 days
* Subject cannot lay safely in a supine position.

Healthy Cohort

* Subject is under 40 or unable to consent.
* Subject has any medical condition, which, in the judgment of the Investigator and/or designee, makes the subject a poor candidate for the investigational study.
* One or more limbs has a prior or current diagnosis of PAD, or is reasonably suspected of having a diagnosis of PAD.
* Subject does not have a suitable finger to attach the FlowMet-R probe.
* Subject does not have a suitable 1st or 2nd digit to attach FlowMet-R probe.
* Subject has undergone revascularization within the last 90 days
Minimum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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ICON plc

INDUSTRY

Sponsor Role collaborator

Medtronic Endovascular

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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The Iowa Clinic

Des Moines, Iowa, United States

Site Status

Mercy Research

Chesterfield, Missouri, United States

Site Status

The Mt. Sinai Hospital

New York, New York, United States

Site Status

Ohio Health

Columbus, Ohio, United States

Site Status

Ascension Seton

Austin, Texas, United States

Site Status

Countries

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United States

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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30081919

Identifier Type: -

Identifier Source: org_study_id

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