PNS to Improve Vascular Function and Limb Health in Veterans
Peripheral Neural Stimulation to Improve Microvascular Function and Limb Health in Veterans With Diabetic Peripheral Neuropathy
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Jessica R Jarvela, MS BS
- Telefonnummer: 63801 (216) 791-3800
- E-Mail: Jessica.Jarvela@va.gov
Studieren Sie die Kontaktsicherung
- Name: Hamid Charkhkar, PhD
- Telefonnummer: 62924 (216) 791-3800
- E-Mail: Hamid.Charkhkar@va.gov
Studienorte
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Ohio
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Cleveland, Ohio, Vereinigte Staaten, 44106-1702
- Louis Stokes VA Medical Center, Cleveland, OH
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Kontakt:
- Aarika Sheehan, DPT
- Telefonnummer: 65832 (216) 791-3800
- E-Mail: Aarika.Sheehan@va.gov
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Kontakt:
- Jessica R Jarvela, MS BS
- Telefonnummer: 63801 (216) 791-3800
- E-Mail: Jessica.Jarvela@va.gov
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Hauptermittler:
- Hamid Charkhkar, PhD
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
Inclusion Criteria:
Inclusion Criteria - All Participants:
- English-speaking
- Veteran
Inclusion Criteria - Diabetic Peripheral Neuropathy (DPN) Participants:
- Confirmed diagnosis of type 1 or type 2 diabetes mellitus for at least 5 years
- Clinical signs and/or symptoms consistent with diabetic peripheral neuropathy Or confirmation of neuropathy via physical exam
Inclusion Criteria - Lower Limb Amputees:
- Unilateral transtibial or transfemoral amputation
- Medically stable for at least 3 months
- For the designated subset of the limb-loss cohort (n = 6): implanted with C-FINEs on the sciatic and/or tibial nerves
Exclusion Criteria:
Exclusion Criteria - All Participants:
- Severe neurological disorders impairing ambulation
- Visual or hearing impairments interfering with study participation
- Cardiovascular or respiratory conditions posing risk during participation
- Cognitive or psychiatric conditions compromising informed consent
- Participation in other clinical trials interfering with outcomes
- Pregnancy
- History of photosensitivity or known sensitivity to laser light
Additional Exclusion Criteria - Amputees:
- Active skin breakdown or infection at residual limb
- Significant phantom or residual limb pain interfering with study procedures
- Bilateral lower-limb amputation
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Versorgungsforschung
- Zuteilung: Nicht randomisiert
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Single
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
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Experimental: Implanted Neural and Muscular Interface
6 lower limb loss participants who have already been chronically implanted with neural and muscular interfaces to allow for direct stimulation
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The implanted neural and and muscular interface will be used to characterize neurovascular reflex testing (thermal axon reflex & pressure-induced vasodilation) and microvascular imaging using Laser Doppler Flowmetry and PAI.
Reflex responses will be evaluated under baseline and stimulation conditions (sham, tonic, biomimetic), with direct stimulation performed by the CFINE cohort for modality comparison.
Structural-functional relationships will be modeled by integrating metrics from PAI with reflex outcomes.
The cutaneous peripheral nerve stimulation interface will be used to characterize neurovascular reflex testing (thermal axon reflex & pressure-induced vasodilation) and microvascular imaging using Laser Doppler Flowmetry and PAI.
Reflex responses will be evaluated under baseline and stimulation conditions (sham, tonic, biomimetic).
Structural-functional relationships will be modeled by integrating metrics from PAI with reflex outcomes.
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Experimental: Peripheral nerve stimulation
30 able body participants and 12 participants with unilateral lower-limb loss with receive peripheral nerve stimulation
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The cutaneous peripheral nerve stimulation interface will be used to characterize neurovascular reflex testing (thermal axon reflex & pressure-induced vasodilation) and microvascular imaging using Laser Doppler Flowmetry and PAI.
Reflex responses will be evaluated under baseline and stimulation conditions (sham, tonic, biomimetic).
Structural-functional relationships will be modeled by integrating metrics from PAI with reflex outcomes.
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Cutaneous Vascular Conductance
Zeitfenster: baseline and visits 1-15 until study completion, average 1 year
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Autonomic reflex testing including thermal axon reflex and pressure induced vasoconstriction will be applied.
The cutaneous blood flow in the lower limb will be measured using laser doppler flowmetry.
The flux is divided by mean arterial pressure to calculate cutaneous vascular conductance.
This provides a physiologically relevant metric of microvascular control by accounting for systemic pressure fluctuations
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baseline and visits 1-15 until study completion, average 1 year
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Vessel Density
Zeitfenster: baseline and visits 1-15 until study completion, average 1 year
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Defined as the percentage of tissue volume occupied by vascular structures.
The investigators use photoacoustic imaging of microvascular structure to quantify microvascular structural integrity at distal and proximal skin sites.
From the reconstructed volumetric data, the investigators will extract the vessel density
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baseline and visits 1-15 until study completion, average 1 year
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Tissue Oxygen Saturation
Zeitfenster: baseline and visits 1-15 until study completion, average 1 year
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Tissue oxygen saturation or sO2 will be measured during different conditions of the study such as thermal axon reflex and pressure induced vasoconstriction using reflectance spectroscopy
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baseline and visits 1-15 until study completion, average 1 year
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Mean Vessel Diameter
Zeitfenster: baseline and visits 1-15 until study completion, average 1 year
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Calculated from the cross-sectional profiles of resolved vessels obtained from the photoacoustic imaging of microvascular structures
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baseline and visits 1-15 until study completion, average 1 year
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Hemoglobin Oxygenation
Zeitfenster: baseline and visits 1-15 until study completion, average 1 year
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From photoacoustic imaging, hemoglobin oxygenation is derived and compared across different study conditions
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baseline and visits 1-15 until study completion, average 1 year
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Mitarbeiter
Mitarbeiter
Ermittler
Ermittler
- Hauptermittler: Hamid Charkhkar, PhD, Louis Stokes VA Medical Center, Cleveland, OH
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- RRD5-006-25W
- RD001968-01 (Andere Zuschuss-/Finanzierungsnummer: VA Merit)
- 1584038 (Andere Kennung: IRB)
Plan für individuelle Teilnehmerdaten (IPD)
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Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Produkt, das in den USA hergestellt und aus den USA exportiert wird
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