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Hypoglossal Nerve Stimulation Outcomes in Pediatric Trisomy 21 Patients with Overweight or Obesity
Jeffrey C Mecham1, Hannah Gibbs1, Trenton House2
1Department of Otolaryngology, Head and Neck Surgery, Mayo Clinic, Phoenix, Arizona, U.S.A.
Insights
Body mass index (BMI) does not impact hypoglossal nerve stimulator (HNS) outcomes in pediatric patients with Down syndrome. Obese and non-obese children with Down syndrome showed similar favorable responses to HNS therapy.
Area of Science:
- Pediatric Otolaryngology
- Sleep Medicine
- Genetics
Background:
- Obstructive sleep apnea (OSA) is prevalent in pediatric patients with Down syndrome (DS).
- Hypoglossal nerve stimulator (HNS) implantation is an emerging treatment for OSA in this population.
- The impact of body mass index (BMI) on HNS outcomes in pediatric DS patients is not well-established.
Purpose of the Study:
- To evaluate the association between BMI and HNS implantation outcomes in pediatric patients with Down syndrome.
- To compare HNS outcomes between overweight/obese and non-obese pediatric DS patients.
Main Methods:
- Retrospective cohort study of pediatric patients (<21 years) with DS who underwent HNS implantation (2022-2024).
- Patients were categorized based on BMI percentile (overweight/obese vs. non-obese).
- Primary outcome was the reduction in apnea-hypopnea index (AHI) post-implantation.
Main Results:
- Twenty patients (11 overweight, 8 obese) received HNS implants.
- No significant correlation was found between BMI percentile and AHI reduction (r=0.06, p=0.8).
- Obese and non-obese groups showed comparable preoperative AHI, postoperative AHI, and AHI reduction (83.8% obese vs. 81.9% non-obese).
Conclusions:
- BMI status (obesity defined as BMI >95th percentile) does not significantly affect postoperative AHI outcomes following HNS implantation in pediatric DS patients.
- HNS therapy is effective in reducing AHI in both obese and non-obese pediatric DS patients.
Objectives:
To assess the impact of body mass index (BMI) on hypoglossal nerve stimulator (HNS) implantation outcomes in pediatric patients with Down syndrome (DS). We compare outcomes of HNS implantation when comparing children based on overweight or obese status.
Methods:
Retrospective cohort study of patients at a single tertiary pediatric hospital who underwent HNS implantation between 2022 and 2024. Patients with DS under 21 years of age at time of implantation were included. One child with Wolf-Hirschhorn syndrome was also included. The main outcome measured was reduction in apnea-hypopnea index (AHI).
Results:
Twenty patients were implanted with HNS during the study period. Eleven patients were implanted with a BMI considered overweight and 8 patients with a BMI considered obese. No significant correlation was found between BMI percentile and AHI reduction (r = 0.06, p = 0.8). No significant differences were found between obese and non-obese groups for preoperative AHI, postoperative AHI, or AHI reduction. Both groups responded favorably to HNS therapy with AHI reduction of 83.8% in obese patients and 81.9% in non-obese patients.
Conclusion:
We demonstrate no difference in postoperative AHI outcomes when comparing patients with obesity defined as BMI >95th percentile compared to those without.
Level Of Evidence:
3 Laryngoscope, 135:1223-1226, 2025.
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