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The Effect of Electronic Cigarette (ECIG) Liquid Vehicles on ECIG Acute Effects

1. maj 2018 opdateret af: Virginia Commonwealth University
This study examines the acute effects in ECIG users of the two primary vehicles in ECIG liquids, propylene glycol and vegetable glycerin. Thirty experienced ECIG users will use an ECIG in five conditions that will differ only by the propylene glycol:vegetable glycerin ratio: 100:0, 70:30, 50:50, 30:70, and 0:100 (device voltage, heater resistance, liquid nicotine concentration, puff number, and interpuff interval all will be held constant). Plasma nicotine concentration, subjective effects, and puffing behaviors will be recorded in each condition.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Electronic cigarettes (ECIGs) are among the most important issues in public health today due to their dramatic increase in popularity. However, very little is known about ECIGs, including what factors may make them more likely to be used and abused. Examining factors that influence nicotine yield, delivery, and subjective effects from ECIGs is essential to understanding their abuse liability. Limited pre-clinical research has revealed that nicotine yield may be influenced by the ratio of the two liquid vehicles, propylene glycol (PG) and vegetable glycerin (VG), most commonly found in ECIG solutions. Specifically, higher proportions of PG result in greater nicotine yields. However, the influence of PG:VG ratio on nicotine delivery and subjective effects associated with ECIG use has not been examined previously. The primary hypotheses are that higher proportions of PG will result in greater nicotine delivery and subjective effect profiles suggestive of higher abuse liability in ECIG users. Results from this project will result in further understanding of the factors that influence the abuse liability of ECIGs and could inform regulation of these products.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

41

Fase

  • Fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Virginia
      • Richmond, Virginia, Forenede Stater, 23298
        • Clinical Behavioral Pharmacology Laboratory

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 55 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Participants must use ≥1 ml of ECIG solution daily
  • Must use ECIG solution with a nicotine concentration ≥12 mg/ml
  • Must have used an ECIG for ≥3 months
  • Must be willing to abstain from nicotine and tobacco products for ≥12 hours prior to each session.

Exclusion Criteria:

  • History of chronic disease or psychiatric condition
  • Regular use of a prescription medication
  • Marijuana use >10 and alcohol use >25 days in the past 30
  • Any other illicit drug use (e.g., cocaine, opioids) in the past 30 days.
  • Positive test for pregnancy (by urinalysis)
  • Daily use of >5 conventional tobacco cigarettes

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 0 PG: 100 VG
Andet: ECIG liquid vehicles
The ratio of propylene glycol and vegetable glycerin will be changed while all other factors of the electronic cigarette provided to participants will be held constant.
Eksperimentel: 30 PG: 70 VG
Andet: ECIG liquid vehicles
The ratio of propylene glycol and vegetable glycerin will be changed while all other factors of the electronic cigarette provided to participants will be held constant.
Eksperimentel: 50 PG: 50 VG
Andet: ECIG liquid vehicles
The ratio of propylene glycol and vegetable glycerin will be changed while all other factors of the electronic cigarette provided to participants will be held constant.
Eksperimentel: 70 PG: 30 VG
Andet: ECIG liquid vehicles
The ratio of propylene glycol and vegetable glycerin will be changed while all other factors of the electronic cigarette provided to participants will be held constant.
Eksperimentel: 100 PG: 0 VG
Andet: ECIG liquid vehicles
The ratio of propylene glycol and vegetable glycerin will be changed while all other factors of the electronic cigarette provided to participants will be held constant.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Plasma nicotine concentration (ng/ml)
Tidsramme: Collected at each of the 5 visits. Participants can complete up to 2 sessions/week. Thus the average time period to complete all 5 sessions is approximately 3 weeks. Each individual session is approximately 3 hours long.
taken via intravenous catheter
Collected at each of the 5 visits. Participants can complete up to 2 sessions/week. Thus the average time period to complete all 5 sessions is approximately 3 weeks. Each individual session is approximately 3 hours long.
Withdrawal suppression items on a visual analog scale
Tidsramme: Collected at each of the 5 visits. Participants can complete up to 2 sessions/week. Thus the average time period to complete all 5 sessions is approximately 3 weeks. Each individual session is approximately 3 hours long.
provided using computerized questionnaire
Collected at each of the 5 visits. Participants can complete up to 2 sessions/week. Thus the average time period to complete all 5 sessions is approximately 3 weeks. Each individual session is approximately 3 hours long.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Virginia Commonwealth University

Samarbejdspartnere

National Institute on Drug Abuse (NIDA)

Efterforskere

  • Ledende efterforsker: Tory R Spindle, B.S., Virginia Commonwealth University

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juli 2016

Primær færdiggørelse (Faktiske)

16. maj 2017

Studieafslutning (Faktiske)

16. maj 2017

Datoer for studieregistrering

Først indsendt

6. juli 2015

Først indsendt, der opfyldte QC-kriterier

14. juli 2015

Først opslået (Skøn)

16. juli 2015

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

7. maj 2018

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

1. maj 2018

Sidst verificeret

1. maj 2018

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • HM20004850
  • 1F31DA040319-01 (U.S. NIH-bevilling/kontrakt)

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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