Blood transfusion requirements for endoscopic sinonasal inverted papilloma resections.

Background: Endoscopic resection of sinonasal Inverted Papilloma (SNIP) tumors has been shown to reduce intra-operative blood loss and recovery time compared to open approaches. The purpose of this study is to investigate the incidence and requirements of blood transfusion for endoscopic SNIP surgeries.

Methods: An individual retrospective cohort study of endoscopic SNIP surgeries over a 10-year period was performed. Age, sex, pre-existing co-morbidity, use of anti-coagulants, tumor type and stage, time of surgery, estimated blood loss and the requirement for blood transfusion were recorded.

Results: 82 patients were included (57 males, 25 females). 4 (5%) Stage 1, 7 (8.5%) Stage 2, 62 (75.5%) Stage 3 and 9 (11%) Stage 4 SNIP tumors were identified according to the Krouse staging system. 3 (4%) patients required blood transfusion. 3 of the 9 (33%) Stage 4 tumors required blood transfusion. Stage 4 tumors were significantly associated with blood transfusion (p < 0.05). Higher staged tumors were associated with greater blood loss (p < 0.05) than lower staged cases. No other tumor stage required blood transfusion and no other pre-operative variable was associated with requirement for blood transfusion.

Conclusion: Endoscopic SNIP resections rarely require blood transfusions. No pre-operative factor other than tumor stage is associated with the requirement for blood transfusion. We would therefore suggest that only Stage 4 SNIP tumors require pre-operative type and screen.