[A new cardiovascular surgical instrument: aorta sizer].

: A new device comprising a set of graded aorta sizers is presented. Each sizer consists of a disc mounted on the top a straight holder. The length of each holder equals the circumference of its disc (the length of the holder equals the diameter of the disc times 3.14). The size of the discs are graded by 2 mm from 24 mm to 36 mm in diameter. In aneurysm operations, the proper-size vascular graft is selected by sizing the diameter of the transected aorta with the disc portion of a sizer. The proper length of the reinforcing felt strip is then determined by the length of the holder portion of the appropriate sizer.