Patient Warfarin indication Target INR(Range) Operation
A Aortic Valve replacement 3.5 (3-4)  Drainage of skin lesion
B Aortic Valve replacement 3.5 (3-4)  Endoscopic shaving of    articular cartilage
C Mitral Valve replacement 3.5 (3-4) Total vaginal hysterectomy
D Aortic Valve Replacement 4.0 (3.5-4.5) Fusion subtalar joints of foot
E Aortic Valve Replacement 3.5 (3-4) Laparoscopic examination
F Aortic and Mitral Valve replacement 3.5 (3-4)  Total replacement of hip 
G Mitral Valve replacement 3.5 (3-4) Revision of total hip replacement
H Aortic Valve Replacement 2.8 (2.5-3)  Replacement segment of abdominal aorta
I  Recurrent P.E. 2.5 (2-3) Closure of colostomy
Table 2: Patients who did not bleed at surgery