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Verbal Breathing Coaching to Improve Preoxygenation and Extend Safe Apnea Time in Anesthesia

27. april 2026 opdateret af: Mohamed Daabiss, Prince Sultan Military Medical City

Structured Verbal Breathing Coaching During Preoxygenation Prolongs Safe Apnea Time During Induction of General Anesthesia: a Randomized Controlled Trial

This study explores whether simply guiding patients to breathe slowly and calmly before anesthesia can help improve oxygen levels and keep them safe for longer during induction.

The investigators included 120 participants scheduled for elective surgery, comparing routine preoxygenation with a gentle, coached breathing technique using steady inhalation and exhalation.

The investigator focused mainly on how long participants could safely tolerate apnea, while also examining oxygen levels, vital signs, and anxiety.

Studieoversigt

Status

Aktiv, ikke rekrutterende

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This study looks at a simple but meaningful question: can the way the investigators talk to participants-and guide their breathing-make anesthesia safer? Before induction, participants are usually asked to breathe oxygen through a mask, but many do so in a shallow or irregular way due to anxiety or lack of guidance. Here, the investigators introduce a calm, structured approach where participants are gently coached to take slow, deep breaths with controlled inhalation and prolonged exhalation, helping them feel more relaxed and engaged in their own care.

the investigators included 120 adult participants scheduled for elective surgery, all relatively healthy (ASA I-II), and divided them into two groups. One group received the usual instructions to "breathe normally," while the other group was guided step-by-step with simple verbal cues to regulate their breathing pattern. This small change transforms a passive process into an active, patient-centered interaction, potentially improving how effectively oxygen fills the lungs before anesthesia.

the investigators main focus is on "safe apnea time"-how long a patient can maintain adequate oxygen levels after induction before desaturation begins. the investigators also look at additional factors such as oxygen concentration at the end of preoxygenation, changes in blood pressure and heart rate, and even how anxious the participant feels before going to sleep. These measures help the investigators understand not only the physiological benefits but also the emotional impact of this approach.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

120

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Saudi Arabien
      • Riyadh, Saudi Arabien
        • Prince Sultan Military Medical City

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

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Scheduled for elective surgery under general anesthesia with tracheal intubation.
  • BMI < 35 kg/m²
  • The Ability to understand and follow verbal instructions

Exclusion Criteria:

  • Patients with an anticipated difficult airway
  • Significant cardiopulmonary disease
  • Pregnancy
  • Emergency surgery
  • Pre-existing hypoxemia (SpO₂ < 94% on room air)
  • Use of sedative premedication affects respiratory drive.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Control Group: Standard Preoxygenation
receives standard preoxygenation (routine care with no additional coaching).
Procedure: Verbal Breathing Coaching

In addition to standard preoxygenation, patients receive continuous verbal coaching:

"Breathe in slowly through your nose for four seconds" "Now breathe out slowly through your mouth for six seconds" Instructions repeated rhythmically for 3 minutes Delivered by the attending anesthesiologist using a standardized script
Eksperimentel: Intervention Group: Verbal Breathing Coaching
receives structured verbal breathing coaching in addition to standard preoxygenation.
Procedure: Verbal Breathing Coaching

In addition to standard preoxygenation, patients receive continuous verbal coaching:

"Breathe in slowly through your nose for four seconds" "Now breathe out slowly through your mouth for six seconds" Instructions repeated rhythmically for 3 minutes Delivered by the attending anesthesiologist using a standardized script

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Oxygen saturation
Tidsramme: 3 minutes
time from loss of consciousness to SpO₂ reaching 92%
3 minutes

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
End-tidal Oxygen concentration
Tidsramme: 3 minutes
the percentage of oxygen measured in the last portion of exhaled breath at the end of expiration.
3 minutes
Mean arterial pressure
Tidsramme: 3 minutes
Mean arterial pressure
3 minutes
Heart rate
Tidsramme: 3 minutes
Heart rate
3 minutes

Samarbejdspartnere og efterforskere

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

Sponsor

Prince Sultan Military Medical City

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

  • 1. Nimmagadda, U., Salem, M.R., & Joseph, N.J. (2000). Preoxygenation: physiologic basis, benefits, and potential risks. Anesthesiology Clinics of North America, 18(3), 547-563. 2. Tanoubi, I., Drolet, P., & Donati, F. (2009). Optimizing preoxygenation in adults. Canadian Journal of Anesthesia, 56(6), 449-466. 3. Baraka, A., Taha, S.K., El-Khatib, M.F. (1999). Preoxygenation: comparison of maximal breathing and tidal volume breathing techniques. Anesthesia & Analgesia, 89(3), 653-656. 4. Gambee, A.M., Hertzka, R.E., & Fisher, D.M. (1987). Preoxygenation techniques: comparison of three minutes tidal volume breathing and eight deep breaths over 60 seconds. Anesthesiology, 66(6), 816-819. 5. O'Brien, J., Batterham, A.M., & Parkin, P. (2011). Coaching respiratory techniques improves gas exchange and tidal volume during voluntary breathing tasks. Respiration Physiology & Neurobiology, 177(2), 153-158. 6. Weingart, S.D., Levitan, R.M. (2012). Preoxygenation and prevention of desaturation during emergency airway management. Annals of Emergency Medicine, 59(3), 165-175.

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 (Faktiske)

7. februar 2026

Primær færdiggørelse (Anslået)

25. juni 2026

Studieafslutning (Anslået)

14. juli 2026

Datoer for studieregistrering

Først indsendt

10. april 2026

Først indsendt, der opfyldte QC-kriterier

27. april 2026

Først opslået (Faktiske)

4. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

27. april 2026

Sidst verificeret

1. april 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • HP-01-R105

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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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    Ukendt
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    Preoxygenation, Apnø, Anæstesi
    Det Forenede Kongerige

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