Diaphragm Ultrasound İn Children With OSAS

Condition(s) studied

Study summary

This is a prospective observational study evaluating perioperative diaphragmatic function by ultrasonography in children aged 1-12 years undergoing elective surgery under general anesthesia.

Participants will be classified preoperatively based on the parent-completed Pediatric Sleep Questionnaire (PSQ). Children with suspected obstructive sleep apnea syndrome who are scheduled for adenotonsillectomy will form the study group, while children without clinical findings suggestive of obstructive sleep apnea who are scheduled for elective non-airway-related otolaryngologic surgeries will serve as controls.

Diaphragm ultrasound assessments will be performed before and after surgery in the supine position during spontaneous breathing. Measurements will include diaphragmatic thickness at end-inspiration and end-expiration, diaphragmatic thickening fraction, and diaphragmatic excursion during quiet and deep breathing.

The primary objective is to compare diaphragmatic excursion and thickening fraction between groups. Secondary objectives include evaluating the association between perioperative respiratory parameters, postoperative recovery, and diaphragm ultrasound measures.

Eligibility

Primary outcome measure(s)

• Diaphragmatic Thickening Fraction (%) — Following premedication and prior to anesthesia induction, and within the first hour after surgery during the postoperative recovery period.
  Diaphragmatic thickening fraction will be calculated as (thickness at end-inspiration - thickness at end-expiration) / thickness at end-expiration × 100%, measured by ultrasound. The primary comparison will be between the OSAS group and the control group. Measurements will be assessed before and after surgery.

Trial sites (1)

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