Examining the life-cycle of the Coblator II device: Increases in paediatric post-tonsillectomy haemorrhage after six years of use

Table 1 Postoperative haemorrhage rates by year and surgical technique

Year	Coblator actual (%)	Diathermy actual (%)	P value
2012	0-0	0-0	1.0
2013	1-0.7	2-1	0.77
2014	1-0.7	0-0	0.30
2015	2-1.4	1-0.5	0.38
2016	2-0.9	1-0.5	0.62
2017	1-0.6	2-1.3	0.51
2018	4-2	1-0.6	0.05
2019	5-3	0-0	0.03