Association of Blood Type With Postsurgical Mucosal Bleeding in Pediatric Patients Undergoing Tonsillectomy With or Without Adenoidectomy

Key Points Question Is blood type O associated with a higher prevalence hemorrhage in children after tonsillectomy with or without adenoidectomy? Findings In this cohort study of nearly 15 000 children who underwent tonsillectomy with or without adenoidectomy, the hemorrhage rate following surgery was 3.9%. In the cohort of children for whom a blood type was known, those with blood type O experienced bleeding as frequently as those with non-O types, despite having significantly lower baseline von Willebrand factor values. Meaning The findings of this study indicate that bleeding rates after tonsillectomy with or without adenoidectomy are similar in children with blood type O and those with non-O types.

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