Risk factors for secondary post-tonsillectomy haemorrhage following tonsillectomy with bipolar scissors: four-year retrospective cohort study.

OBJECTIVE: To analyse risk factors associated with secondary post-operative bleeding when only one technique, namely bipolar scissors, is used.
METHODS: The medical records of all consecutive patients aged six years or older who underwent tonsillectomy or adenotonsillectomy between 1 December 2010 and 30 November 2014 were retrospectively analysed.
RESULTS: A total of 1734 patients were included in the study. A secondary haemorrhage occurred in 208 patients (12 per cent). Patients aged 15 years or older were 4.5 times (95 per cent confidence interval = 2.6-7.9; p < 0.001) more likely to experience secondary haemorrhage. In cases of acute quinsy, patients aged 15 years or older had an 8.1-fold (95 per cent confidence interval = 1.1-59.6; p = 0.02) increased likelihood of experiencing secondary haemorrhage.
CONCLUSION: Patients aged 15 years or older have a higher risk for bleeding regardless of the primary indication for the tonsillectomy. The risk for secondary haemorrhage does not seem to depend on the primary indication itself.