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Parametric Testing of Direct Physiological Effects of Transcutaneous Vagus Nerve Stimulation (tVNS) in Healthy Controls

15. července 2016 aktualizováno: Medical University of South Carolina

The purpose of this study is to determine the feasibility and safety of Transcutaneous Vagus Nerve Stimulation (tVNS) in healthy controls. Tested in healthy subjects (HS) the physiological effects of tVNS at different stimulation parameters. The electrical stimulation variables will be pulse width, frequency, and current. This will be tested in a laboratory setting and will measure tVNS effects on heart rate, respiration rate, blood pressure, and perceived pain. This is a feasibility and small safety study.

Hypothesis: tVNS is feasible and safe

Přehled studie

Postavení

Dokončeno

Podmínky

Intervence / Léčba

Typ studie

Intervenční

Zápis (Aktuální)

15

Fáze

  • Fáze 1

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

18 let až 70 let (Dospělý, Starší dospělý)

Přijímá zdravé dobrovolníky

Ano

Pohlaví způsobilá ke studiu

Všechno

Popis

Inclusion Criteria:

  • Meets none of the Exclusion Criteria

Exclusion Criteria:

  • History of seizures, depression, or pain conditions
  • Taking any prescription medications (excluding contraceptives and statins)
  • History of any ear trauma
  • History of heart conditions
  • Has a heart pacemaker or artificial valve
  • Has a metal implant above the waste
  • Is pregnant
  • Alcohol Dependence
  • Illicit drug use in past 6 months
  • History of brain surgery or lesions
  • History of loss of consciousness (>15 min)
  • Faint at the sight of blood
  • Hospitalization or surgeries in past 6 months

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Přidělení: Randomizované
  • Intervenční model: Crossover Assignment
  • Maskování: Singl

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: Active tVNS Stimulation
Stimulating electrode will be placed on left tragus of subject. Current will be held constant (200% perceptual threshold) while pulse width and frequency are varied.The intervention used to keep current constant is Digitmer High Voltage Stimulator model DS7A TENS unit. Each stimulation period (9 randomized stimulation parameters varying in pulse width and frequency) will last 1 minute with a 3 minute break between each parameter. Physiological data (O2 saturation, blood pressure, breathing rate, and Electrocardiogram (EKG) to measure heart rate ) will be collected continuously.
Přístroj: Digitmer High Voltage Stimulator model DS7A TENS unit
Falešný srovnávač: Sham tVNS Stimulation
Stimulating electrode will be placed on left ear lobe of subject for sham tVNS stimulation condition. Current will be held constant (200% perceptual threshold) while pulse width and frequency are varied. The intervention used to keep current constant is Digitmer High Voltage Stimulator model DS7A TENS unit. Each stimulation period (9 randomized stimulation parameters varying in pulse width and frequency) will last 1 minute with a 3 minute break between each parameter. Physiological data (O2 saturation, blood pressure, breathing rate, and Electrocardiogram (EKG) to measure heart rate ) will be collected continuously.
Přístroj: Digitmer High Voltage Stimulator model DS7A TENS unit

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Change from Baseline Heart Rate Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 1
Časové okno: Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data,Electrocardiogram (EKG) to measure heart rate in beats/sec will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)
Change from Baseline Heart Rate Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 2
Časové okno: Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data,Electrocardiogram (EKG) to measure heart rate in beats/sec will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)
Change from Baseline O2 Saturation Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 1
Časové okno: Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data O2 saturation (% oxygen) will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)
Change from Baseline O2 Saturation Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 2
Časové okno: Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data O2 saturation (%oxygen) will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Change from Baseline Blood Pressure Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 1
Časové okno: Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data Blood Pressure (mmHg) will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)
Change from Baseline Blood Pressure Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 2
Časové okno: Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data Blood Pressure (mmHg) will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)
Change from Baseline Breathing Rate Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 1
Časové okno: Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data breathing rate (%CO2) will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 1 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)
Change from Baseline Breathing Rate Before Each Stimulation Period (1-9) to Post Stimulation Period (1-9) Visit 2
Časové okno: Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

There are nine stimulation periods, each with own stimulation parameters that consist of a constant current, pulse width and frequency. Each stimulation period has 1 minute of stimulation (active or sham), followed by 3 minutes of post stimulation baseline recording Each of the stimulation period last 4 minutes with an additional 90 seconds between each Stimulation period. Current will be 200% of the subject's perceptual threshold for each stimulation parameter. The pulse width will be either 100 microseconds (µs), 200 µs, or 500µs. Frequency will be either 1 Hertz (Hz), 10 Hz, or 25 Hz.

Baseline physiological data breathing rate (%CO2) will be collected before each stimulation parameter, during stimulation parameter, and post each stimulation parameter.
Total time for Visit 2 (either active or sham condition) is 50 minutes - 9 Stimulation Periods (each 4 minutes long with 90 seconds between)

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Medical University of South Carolina

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia

1. listopadu 2014

Primární dokončení (Aktuální)

1. srpna 2015

Termíny zápisu do studia

První předloženo

6. července 2016

První předloženo, které splnilo kritéria kontroly kvality

15. července 2016

První zveřejněno (Odhad)

18. července 2016

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Odhad)

18. července 2016

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

15. července 2016

Naposledy ověřeno

1. června 2016

Více informací

Termíny související s touto studií

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