2018 CSO General Scientific Program

“Quality of Life Improvements Post-Adenotonsillectomy in Children with Severe Obstructive Sleep Apnea Diagnosed with a Clinical Pulse Oximetry-Based System”

Alexandra Laverde-Saad, Arzu Chaudhry, Nebras Ghazawi, Sabrina Wurzba, Robert Brouillette, Jeffrey Yeung, Evelyn Constantin, Lily Nguyen



Prior studies have used polysomnography to diagnose obstructive sleep apnea (OSA) and assess improvement post adenotonsillectomy (T&A).



We report 122 children who had severe OSA diagnosed by a McGill Oximetry Score (MOS) of 3 or 4. All children had T&A. Improvement was assessed by repeating the MOS. QoL was assessed using the OSA-18 questionnaire.



Changes in oximetry metrics documented fewer and less severe desaturation postoperatively;

  • MOS decreased in 116 of 122 patients


Total OSA-18 score decreased in 115 of 122


Each OSA-18 item improved on average, the greatest improvements being in questions about sleep and breathing during sleep.


Of the patients that did not improve:

  • 5 patients remained MOS 4;
  • 6 patients had worsening of their OSA-18 scores;
  • Predictors of non-improvement will be presented.



  • MOS with clinical evaluation to decide upon T&A is reliable for MOS 3-4 patients.
  • Certain OSA-18 items show more improvement after T&A.

Learning Objectives

  1. To describe the frequency and extent of QOL and oximetry improvements post T&A in children diagnosed with severe OSA using an oximetry/clinical based system.
  2. To understand which of the OSA-18 items typically improves postoperatively.
  3. To describe clinical, quality of life and oximetry factors that predict failure to improve after T&A.

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Scheduling Details

Posters can be seen in the Gray/Palmer/Pope Ballroom. This room will be open on Sunday, June 12 from 09:00 to 17:00, and on Monday, June 13 from 09:00 to 16:00.

Authors' Contact Details

Corresponding Author: Ms. Alexandra Laverde-Saad

Senior Author: Dr. Lily Nguyen

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