The incidence of unintended extension ( 8.8 % vs. 4.8 % ; p = 0.009 ) , mean estimated blood loss ( 853.67 42 mL vs. 664.80 38 mL ; p = 0.001 ) , and blood loss > 1000 mL ( 11.4 % vs. 6.8 % ; p = 0.009 ) was significantly higher in the sharp group compared with the blunt group .