Preoxygenation
Conditions
Keywords
Preoxygenation, Verbal breathing coaching, Safe apnea time, General anesthesia induction, Patient safety
Brief summary
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.
Detailed description
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.
Interventions
PROCEDUREVerbal 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
Sponsors
Prince Sultan Military Medical City
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
SINGLE (Subject)
Masking description
Participants will be randomized into a two equal groups each will be 60 participants, using a computer-generated random sequence. Allocation will be concealed in sealed opaque envelopes opened immediately before preoxygenation.
Intervention model description
prospective, randomized, parallel-group controlled trial
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Oxygen saturation | 3 minutes | time from loss of consciousness to SpO₂ reaching 92% |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| End-tidal Oxygen concentration | 3 minutes | the percentage of oxygen measured in the last portion of exhaled breath at the end of expiration. |
| Mean arterial pressure | 3 minutes | Mean arterial pressure |
| Heart rate | 3 minutes | Heart rate |
Countries
Saudi Arabia
Outcome results
None listed