Verbal Breathing Coaching to Improve Preoxygenation and Extend Safe Apnea Time in Anesthesia
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.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
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.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
-
-
-
Riyadh, Arabie Saoudite
- Prince Sultan Military Medical City
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
La description
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.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Diagnostique
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Seul
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Comparateur actif: Control Group: Standard Preoxygenation
receives standard preoxygenation (routine care with no additional 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 |
|
Expérimental: Intervention Group: Verbal Breathing Coaching
receives structured verbal breathing coaching in addition to standard preoxygenation.
|
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 |
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Oxygen saturation
Délai: 3 minutes
|
time from loss of consciousness to SpO₂ reaching 92%
|
3 minutes
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
End-tidal Oxygen concentration
Délai: 3 minutes
|
the percentage of oxygen measured in the last portion of exhaled breath at the end of expiration.
|
3 minutes
|
|
Mean arterial pressure
Délai: 3 minutes
|
Mean arterial pressure
|
3 minutes
|
|
Heart rate
Délai: 3 minutes
|
Heart rate
|
3 minutes
|
Collaborateurs et enquêteurs
Parrainer
Publications et liens utiles
Publications générales
- 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.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Autres numéros d'identification d'étude
- HP-01-R105
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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