3.4. Safety evaluation index
bleeding
BLEEDING, SUBCUTANEOUS HEMATOMA
There are 9 cases (12.9%) of bleeding around the puncture site and subcutaneous hematoma in the heparin group, and 1 case (1.3%) in the sodium citrate group, and the difference is statistically significant (RR = 0.1, 95%CI 0.01 to 0.77, 