HYPOTHESIS:
During anesthetic pre-oxygenation with high FiO2, pulmonary atelectasis occur, especially in patients \< 6 years old, where FRC and pulmonary closing volume may overlap. New borns and children \<1 year old are especially vulnerable.
OBJECTIVES:
1. Validate "air test" as a individualized and non-invasive diagnostic method of clinically significant atelectasis in pediatrics.
2. Determine what other factors contribute to atelectasis development in pediatrics
METHODS:
30 pediatric patients will be studied with ages ranged between 45 postconceptional weeks and16 years old.
Baseline SpO2 and lung ultrasound will be performed for each patient upon arrival at the operating theatre before preoxygenation with FiO2 of 1.0 SpO2 will be measured 15 min after intubation during a 5 min long "air test" trial (FiO2 0.25). lung collapse will be verified by lung ultrasound at the end of the 15 min trial. Lung collapse will be eventually granted upon lung US verification by a blind researcher.
Who can participate
Age range
5 Weeks – 16 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* General anesthesia
* Perioperative risk classification (ASA) I, II, III
* Newborns (postconceptional age\> 45 weeks) to 16 years
* Need for oral / nasotracheal intubation
Exclusion Criteria:
* ASA \> III
* Basal SpO2 \< 97% on air in supine position
* Preoperative need for oxygen therapy and / or high-flow nasal cannulas
* Expected Difficult airway
* Presence of craniofacial disorders that may compromise ventilation
* Hemodynamic instability and / or need for inotropics
* History of untreated heart disease
* Presence or history of pneumothorax
* Presence of untreated congenital pulmonary disorders
* Refusal to participate in the study
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.