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Puff Topography and Sensory Effects Across IQOS Device Generations

29 juli 2026 bijgewerkt door: American University of Beirut Medical Center

Puff Topography and Sensory Effects Across IQOS Device Generations: A Randomized Crossover Study

The goal of this clinical trial is to learn how people use two generations of IQOS heated tobacco devices and how each device affects their smoking behavior and sensory experience.

The main questions it aims to answer are:

  • Do participants puff differently when using the newer IQOS Iluma i compared to the older IQOS 2.4?
  • Does the flavor of the tobacco stick (preferred flavor vs. standard tobacco flavor) affect puffing behavior or sensory experience?
  • What are the differences in throat hit, mouthfeel, and satisfaction between the two devices?

Participants will:

  • Attend 2 laboratory visits at the American University of Beirut
  • Use both the IQOS Iluma i and IQOS 2.4 devices during each visit
  • Have their puffing behavior recorded automatically during device use
  • Provide a breath sample before and after each use session
  • Complete short questionnaires about how each device felt and their urge to smoke

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Heated tobacco products (HTPs) such as IQOS have evolved across generations, with newer models using induction-based heating rather than a ceramic blade. Nicotine yields have declined across generations, raising the possibility that sensory characteristics have been modified to maintain product appeal. Current emissions assessments rely on standardized machine-puffing regimens derived from cigarette testing, which may not reflect real-world IQOS user behavior. This study will characterize puff topography (volume, duration, flow rate, inter-puff interval, number of puffs) in 50 exclusive IQOS users during ad-libitum use of the IQOS Iluma i and IQOS 2.4 under preferred and standardized (Amber) flavor conditions. A randomized crossover design with two visits will be used, with device order within each visit randomized using a Williams design. Secondary outcomes include chemosensory ratings (mouthfeel, ease of draw, throat hit), and subjective effects (satisfaction, pleasantness, taste, urges). Data will inform device-specific puffing regimens for use in future emissions assessments.

Studietype

Ingrijpend

Inschrijving (Geschat)

50

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

  • Naam: Soha Talih, PhD
  • Telefoonnummer: 3627 +961-1-350000
  • E-mail: st38@aub.edu.lb

Studie Contact Back-up

  • Naam: Mario El Hourani, PhD
  • Telefoonnummer: +96170715263
  • E-mail: me217@aub.edu.lb

Studie Locaties

  • Libanon
      • Beirut, Libanon
        • Werving
        • Clinical Aerosol Technology Laboratory (CATLAB), American University of Beirut
    • Beirut
      • Beirut, Beirut, Libanon, 1107 2020
        • Werving
        • Clinical Aerosol Technology Laboratory (CATLAB), American University of Beirut
        • Contact:
          • Dr. Soha Talih, PHD
          • Telefoonnummer: 3627 +9611350000
          • E-mail: st38@aub.edu.lb

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • Current IQOS user (at least 3 days per week in the past 30 days)
  • Age 18 to 65 years
  • Generally healthy
  • Willing to provide informed written consent
  • Willing to attend all laboratory visits
  • Willing to abstain from all nicotine and tobacco products for at least 12 hours before each visit

Exclusion Criteria:

  • Use of any tobacco products other than IQOS in the past 30 days
  • Chronic cardiovascular conditions, seizures, or abnormal blood pressure
  • Current psychiatric disorder requiring active treatment, including major depressive disorder
  • Regular use of prescription medications that may influence cardiovascular function, respiratory function, or nicotine metabolism (excluding vitamins or birth control)
  • Use of cocaine, opioids, benzodiazepines, or methamphetamines in the past month
  • Marijuana use on more than 15 days per month
  • Current pregnancy or breastfeeding
  • Plans to quit nicotine or tobacco products within the next 30 days

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Fundamentele wetenschap
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Crossover-opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: IQOS Iluma i (Induction Heating)
Participants use the IQOS Iluma i device with TEREA tobacco sticks under two flavor conditions (preferred flavor and standardized Amber flavor) across study visits. The IQOS Iluma i uses induction-based heating technology.
Apparaat: IQOS Iluma i with TEREA Tobacco Sticks
The IQOS Iluma i is an induction-heated tobacco device used with TEREA STICKS. Participants use the device ad libitum during two smoking bouts (preferred flavor and Amber flavor conditions) across two study visits. Puff topography is recorded continuously during use.
Actieve vergelijker: IQOS 2.4 (Blade Heating)
Participants use the IQOS 2.4 device with HEETS tobacco sticks under two flavor conditions (preferred flavor and standardized Amber flavor) across study visits. The IQOS 2.4 uses ceramic blade heating technology.
Apparaat: IQOS 2.4 with HEETS Tobacco Sticks
The IQOS 2.4 is a ceramic blade-heated tobacco device used with HEETS tobacco sticks. Participants use the device ad libitum during two smoking bouts (preferred flavor and Amber flavor conditions) across two study visits. Puff topography is recorded continuously during use.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Chemosensory Effects - Mouthful
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Chemosensory Effects: Three sensory feedback items assessed after each smoking bout: (1) Mouthful - amount of aerosol filling the mouth, rated on a 1-5 visual analog scale (1 = barely any smoke to 5 = a lot of smoke); higher scores indicate greater mouthful sensation.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Chemosensory Effects - Ease of draw
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Chemosensory Effects: Three sensory feedback items assessed after each smoking bout: (2) Ease of draw - effort required to draw a puff, rated on a 1-5 visual analog scale (1 = easy to 5 = hard); higher scores indicate greater effort required.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Chemosensory Effects - Throat hit
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Chemosensory Effects: Three sensory feedback items assessed after each smoking bout: (3) Throat hit - intensity of throat sensation, rated on a 0-100 General Labeled Magnitude Scale (0 = barely detectable to 100 = strongest imaginable); higher scores indicate greater throat hit intensity.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Mean Puff Duration
Tijdsspanne: Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Mean duration (seconds) of each puff recorded continuously during ad-libitum use of each device using the eTOP puff topography instrument.
Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Number of Puffs Per Stick
Tijdsspanne: Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Total number of puffs taken per tobacco stick during each ad-libitum smoking bout, recorded using the eTOP puff topography instrument.
Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Mean Inter-Puff Interval
Tijdsspanne: Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Mean time (seconds) between the end of one puff and the start of the next, recorded continuously during ad-libitum use of each device using the eTOP puff topography instrument.
Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Mean Puff Flow Rate
Tijdsspanne: Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Mean peak puff flow rate (mL/s) recorded continuously during ad-libitum use of each device using the eTOP puff topography instrument.
Continuously during each ad-libitum smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Urge to Use IQOS - Factor 1: desire/intention
Tijdsspanne: Immediately before and immediately after each smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Urge to use IQOS assessed using a 10-item adaptation of the Questionnaire on Smoking Urges-Brief (QSU-Brief), rated on a 7-point scale (1 = Strongly Disagree to 7 = Strongly Agree). Higher scores indicate greater urge to use IQOS. Total score and subscale scores (Factor 1: desire/intention; Factor 2: negative reinforcement) will be reported.
Immediately before and immediately after each smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Urge to Use IQOS - Factor 2: negative reinforcement
Tijdsspanne: Immediately before and immediately after each smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Urge to use IQOS assessed using a 10-item adaptation of the Questionnaire on Smoking Urges-Brief (QSU-Brief), rated on a 7-point scale (1 = Strongly Disagree to 7 = Strongly Agree). Higher scores indicate greater urge to use IQOS. Total score and subscale scores (Factor 1: desire/intention; Factor 2: negative reinforcement) will be reported.
Immediately before and immediately after each smoking bout, at Visit 1 (day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - satisfaction
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - taste
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - throat/chest sensations
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - calm
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - awake
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - irritable
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - concentration
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - hungry
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - dizziness
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - nausea
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - craving relief
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
Subjective Effects of IQOS Use - enjoyment
Tijdsspanne: Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)
12-item questionnaire assessing subjective effects of IQOS use, rated on a 7-point scale (1 = Not at all to 7 = Extremely). Higher scores indicate greater intensity of the effect. Items assess: satisfaction, taste, throat/chest sensations, calming, alertness, irritability relief, concentration, hunger suppression, dizziness, nausea, craving relief, and enjoyment. Each item is reported individually. The questionnaire is a modified version of the Subjective Effects Questionnaire (SEQ), adapted for IQOS.
Immediately after each smoking bout, at Visit 1 (Day 1) and Visit 2 (Visit 2 scheduled at least 48 hours after Visit 1)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

American University of Beirut Medical Center

Onderzoekers

  • Hoofdonderzoeker: Soha Talih, American University of Beirut Medical Center

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

27 juli 2026

Primaire voltooiing (Geschat)

1 oktober 2027

Studie voltooiing (Geschat)

15 december 2027

Studieregistratiedata

Eerst ingediend

3 juli 2026

Eerst ingediend dat voldeed aan de QC-criteria

13 juli 2026

Eerst geplaatst (Werkelijk)

20 juli 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

30 juli 2026

Laatste update ingediend die voldeed aan QC-criteria

29 juli 2026

Laatst geverifieerd

1 juni 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • BIO-2026-0012
  • AUB (Ander subsidie-/financieringsnummer: American University of Beirut)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Beschrijving IPD-plan

Individual participant data will not be shared. Data are stored on password-protected institutional computers at the American University of Beirut and are accessible only to authorized study personnel. Data may be made available to qualified researchers upon reasonable request to the corresponding author.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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