For some children who have clinical concern for sleep disordered breathing or obstructive sleep apnea on a sleep study, the surgical procedure may also involve a direct laryngoscopy and bronchoscopy performed prior to tonsillectomy or adenotonsillectomy. During the laryngoscopy and bronchoscopy, the airway from the level of the mouth to the branches of the windpipe into each lung are inspected with small rigid cameras (endoscopes); if floppiness/collapse (laryngomalacia) of the supraglottis (tissue above the vocal cords) is observed, the child will undergo a laser supraglottoplasty to remove the floppy tissue and relieve the obstruction. If a child has laryngomalacia and supraglottoplasty is performed, the child will then be excluded from the study. Exclusion at this time is based on the creation of an additional wound bed in the throat which could weaken our ability to determine if application of fibrin sealant or bupivacaine-infused fibrin sealant is effective. If during direct laryngoscopy and bronchoscopy, no laryngomalacia is observed and no supraglottoplasty is performed, then the child will continue into the treatment arm into which they were randomized.