associated and potentially contributing factors in this particular case were ( 1 ) the patient 's preoperative hypertrophic gonarthrosis , ( 2 ) our difficulty in regulating her postoperative sodium warfarin ( coumadin ) dosages , ( 3 ) the postoperative knee manipulation , and ( 4 ) possibly , the additional surgical exposure of this patient 's distal femur required to use the femur-based alignment instrumentation .
C0376218
sodium warfarin
C0699129
coumadin