Peripheral Arterial Disease
Conditions
Keywords
Ankle-brachial index, Tissue Oxygen Saturation, Near infrared spectroscopy, NIR, Peripheral Arterial Disease, PAD, CLI, Provocative Leg Maneuver, PAD screening
Brief summary
The objective of this trial is to determine if Near-infrared spectroscopy (NIRS) can accurately evaluate the degree of Peripheral Arterial Disease (PAD) during a Provocative Elevation Maneuver of the Lower Extremity (PEMLE) test, as compared to routine clinical assessments.
Detailed description
This study is designed as a prospective observational study to assess the effectiveness of NIRS to accurately evaluate the degree of PAD, as compared to routine clinical assessment, during the PEMLE test protocol. This will be a single visit study where subjects will be screened and enrolled during a regular clinic visit.
Interventions
DEVICESnapshotNIR imaging
SnapshotNIR will be used for tissue oxygen-saturation imaging of all the subjects' foot along with standard of care procedures for PAD assessment.
Sponsors
The University of Texas Health Science Center at San Antonio
Kent Imaging Inc
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
35 Years to 99 Years
Healthy volunteers
Yes
Inclusion criteria
* 35-99 years of age * Subject has at least 1 intact forefoot * Can achieve leg positions to complete the study
Exclusion criteria
* The subject is unwilling or unable to comply with the protocol or scheduled appointments. * The subject has had transmetatarsal amputation or higher on both limbs. * Vascular intervention within the past year * Subjects who have had a previous distal bypass procedure * Pregnant or plans to become pregnant * Deemed by the PI to be unsuitable for the study
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Comparing change in plantar foot NIRS measurements (baseline vs raised position) during a Provocative Maneuver Leg Raise test to the SOC clinical assessment of PAD | 1-2 days | The significance of the relationship will be evaluated using an analysis of variance (ANOVA) where the independent variable will be the SOC assessment of PAD and the dependent variable will be the difference in NIRS measurement between the initial position (supine) and the second position (elevated leg). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Comparing change in plantar foot NIRS measurements (baseline vs raised position) during a Provocative Maneuver Leg Raise test paired with the presence/absence of diabetes to the SOC clinical assessment of PAD | 1-2 days | This outcome will be evaluated using an analysis of variance (ANOVA) with two independent variables (factors) including the SOC assessment of PAD and the presence of diabetes (present or not) and the dependent variable will be the difference in NIRS measurement between the initial position (supine) and the second position (elevated leg). |
| Comparing change in dorsal foot NIRS measurements (baseline vs raised position) during a Provocative Maneuver Leg Raise test to the SOC clinical assessment of PAD | 1-2 days | This outcome will be evaluated in a similar fashion as the analysis from the primary outcome but with the dependent variable will be calculated based on measurements taken from the dorsal surface of the foot which will be evaluated against the independent variable (SOC assessment) via ANOVA. |
| Change of NIRS measurements with other positions | 1-2 days | This outcome will be evaluated in a similar fashion as the analysis from the primary outcome but with the dependent variable being the difference in NIRS measurement between the raised and dependent position (patient sitting up) and then the baseline and dependent position which will be evaluated against the independent variable (SOC assessment) via ANOVA. |
Countries
United States
Contacts
Primary ContactSunny Sajjad, DPM
Outcome results
None listed