Partial intracapsular tonsillectomy in the treatment of pediatric obstructive sleep apnea/hypopnea syndrome: a prospective study with 5-year follow-up

Objective To assess efficacy and safety of tonsil reduction with bipolar forceps electrocautery as treatment of paediatric obstructive sleep apnea/hypopnea syndrome (OSAHS). Study Design Prospective interventional study Methods Two hundred and sixty-three children aged 4-10 years with OSAHS and an apnea hypopnea index (AHI) > 3 were enrolled from March 2013 to January 2016. Pre-operative evaluation included oropharyngeal clinical examination with fiberoptic nasopharyngoscopy, OSA-18 questionnaire and overnight sleep study. All children were treated with adenoidectomy and tonsillotomy with bipolar forceps. OSA-18 questionnaire and overnight sleep study were performed 30 days after surgery. Results Pre-operative average of the OSA-18 questionnaires was of 70.3 (SD=9.7); 30-day post-operative score was 23.15 (SD= 8.2; p=0.045). Pre-operative average Apnea Hypopnea Index (AHI) score was 9.41 (SD=4.1); 30-day post-operative average of AHI score was of 1.75 (SD=0.8; p=0.012). Oxygen Desaturation Index (ODI) rate changed from 7.39 (SD=4) to 1.34 (30-day post-operative) (SD=4.7; p=0.085). NADIR rate changed from 79% (SD=6.32) to 90% (30-day post-operative) (SD=5.18; p=0.00012). Peri- and post-operative complications in our sample were mainly pain (average 75 doses of paracetamol), while bleeding did not occur (0%). All patients received a follow-up examination five years after surgery to evaluate tonsil size; at this time-point, a reduction in tonsil size from 3.6 (3-4; SD=4.2) to 1.3 (1-2; SD=5.5) was found, while tonsil regrowth was observed in 5 children (2%). Conclusion This study showed that partial tonsillotomy with bipolar forceps electrocautery associated to adenoidectomy is an effective technique in treating OSAHS symptoms in children and ensures less complications in terms of hemorrhage, postoperative pain and infections compared to traditional adenotonsillectomy. The very low tonsillar regrowth rate reported in this study may support the routine use of this technique