US D421803 S
FIG. 1 is a perspective view of a retractor for coronary artery bypass surgery showing our new design; the broken line showing of the chest cavity is for illustrative purposes only and forms no part of the claimed design;
FIG. 2 is a top view thereof;
FIG. 3 is a is a bottom view thereof;
FIG. 4 is a is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a left side view thereof.