Denne siden ble automatisk oversatt og nøyaktigheten av oversettelsen er ikke garantert. Vennligst referer til engelsk versjon for en kildetekst.

Physiological Responses to Upper Limb NMES

3. juni 2026 oppdatert av: Kieron.Day

Exploring Local Physiological Changes in the Arm During NMES Using the Firefly® Device

The primary objective of this study is to explore the application of the Firefly® device for delivering NMES to anatomically defined regions of the upper limb and to observe associated physiological changes. Specifically, the study will assess alterations in arterial and venous blood flow, as well as local muscle oxygen saturation, as potential indicators of muscle perfusion during NMES.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

Participants will undergo NMES using the Firefly® device, applied to two predefined regions of the upper limb: one targeting the anterior arm nerve bundle (a collective term referring to motor and sensory nerves within the anterior and medial compartments of the upper arm, including the musculocutaneous and adjacent (median, medial cutaneous, ulnar and radial) nerves, and the other targeting the median nerve in the proximal forearm.

Vascular responses will be assessed at two sites, the brachial artery and axillary vein, using Doppler ultrasound. For each nerve-vascular site pairing, NMES will alternate between stimulation OFF and ON conditions (10 OFF and 10 ON cycles), comprising one stimulation block of approximately 20 minutes. Each participant will complete four stimulation blocks in total.

During both ON and OFF phases, blood flow volume and haemodynamic parameters, including peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI), will be recorded. Additionally, local muscle oxygen saturation (SmO₂) will be continuously monitored using functional near-infrared spectroscopy (fNIRS) to assess tissue-level physiological changes.

The total study participation time per individual is approximately 2 hours.

Studietype

Intervensjonell

Registrering (Faktiske)

10

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Storbritannia
    • Buckinghamshire
      • High Wycombe, Buckinghamshire, Storbritannia, HP11 1JX
        • Firstkind

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen

Tar imot friske frivillige

Nei

Beskrivelse

Inclusion Criteria:

  • Aged 18 to 45 years (inclusive)
  • No known history of vascular or neurological conditions affecting the upper extremities
  • Able to read, understand, and communicate in English to ensure informed consent and safe participation in the study

Exclusion Criteria:

  • Presence of any condition that contraindicates the use of neuromuscular electrical stimulation (e.g., implanted pacemaker, epilepsy)
  • Current or recent injury to the upper limbs that may interfere with stimulation or measurement
  • Anatomical variations in the brachial artery or axillary vein, specifically vascular branching outside expected anatomical locations, as identified by ultrasound, which may impair accurate blood flow measurement or device placement
  • Currently participating in another interventional or physiological research study or having done so within the past 30 days.
  • Currently pregnant

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Single experimental arm: Firefly NMES
Enhet: Firefly NMES device
Firefly NMES device applied to the upper limb during a single-visit exploratory pysiological study

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in upper-limb blood flow volume during NMES (ON vs OFF)
Tidsramme: During single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles
Within-subject change in upper-limb blood flow volume (mL/min) measured using Doppler ultrasound during neuromuscular electrical stimulation (NMES) delivered via the Firefly device, comparing stimulation ON versus OFF conditions. Measurements will be collected across repeated stimulation cycles at predefined upper-limb stimulation zones and vascular assessment sites.
During single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles
Change in upper-limb peak systolic velocity during NMES (ON vs OFF)
Tidsramme: During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Within-subject change in upper-limb peak systolic velocity (PSV; cm/s) measured using Doppler ultrasound during NMES delivered via the Firefly device, comparing stimulation ON versus OFF conditions across repeated stimulation cycles at predefined upper-limb stimulation zones and vascular assessment sites.
During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Change in upper-limb end-diastolic velocity during NMES (ON vs OFF)
Tidsramme: During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Within-subject change in upper-limb end-diastolic velocity (EDV; cm/s) measured using Doppler ultrasound during NMES delivered via the Firefly device, comparing stimulation ON versus OFF conditions across repeated stimulation cycles at predefined upper-limb stimulation zones and vascular assessment sites.
During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Change in upper-limb resistive index during NMES (ON vs OFF)
Tidsramme: During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Within-subject change in upper-limb resistive index (RI; unitless ratio) derived from Doppler ultrasound measurements during NMES delivered via the Firefly device, comparing stimulation ON versus OFF conditions across repeated stimulation cycles at predefined upper-limb stimulation zones and vascular assessment sites.
During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Change in upper-limb muscle oxygen saturation during NMES (ON vs OFF)
Tidsramme: During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.
Within-subject change in upper-limb muscle oxygen saturation (SmO₂; %) measured continuously using functional near-infrared spectroscopy (fNIRS) during NMES delivered via the Firefly device, comparing stimulation ON versus OFF conditions across repeated stimulation cycles at predefined upper-limb stimulation zones and assessment sites.
During a single study visit (approximately 2 hours), across repeated stimulation ON/OFF cycles.

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Incidence of adverse events and device-related effects
Tidsramme: During single study visit (approximately 2 hours)
Number and type of adverse events (AEs), serious adverse events (SAEs), adverse device effects (ADEs), serious adverse device effects (SADEs), and device deficiencies observed during study participation.
During single study visit (approximately 2 hours)

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Kieron.Day

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

19. september 2025

Primær fullføring (Faktiske)

3. oktober 2025

Studiet fullført (Faktiske)

3. oktober 2025

Datoer for studieregistrering

Først innsendt

10. april 2026

Først innsendt som oppfylte QC-kriteriene

3. juni 2026

Først lagt ut (Faktiske)

9. juni 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

9. juni 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

3. juni 2026

Sist bekreftet

1. juni 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Andre studie-ID-numre

  • FFR-ARM-002 (Annet stipend/finansieringsnummer: Firstkind)

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

JA

IPD-planbeskrivelse

Available upon request

IPD-deling Støtteinformasjonstype

  • STUDY_PROTOCOL
  • ICF

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

produkt produsert i og eksportert fra USA

Nei

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

Abonnere