| 摘要 |
In a case of repairing an aortic valve, etc. by forming a valve cusp with a biomembrane or the like, the shape and the size of a valve cusp can be determined easily. An instrument including a valve cusp sizer 2 for measuring the sizer of the valve cusp and a template 3 for scribing lines for the shape of a valve cusp conforming to the measured size of the valve cusp, in which the valve cusp sizer 2 has a plurality of differently-sized sizer blocks (G1 to G8) attached to each of the top ends of grip members 21 respectively and each sizer block has an arcuate surface 24 formed by cutting each of differently-sized circular cylinders 22 at an angle conforming to the central angle for the commissure portions and, the template 3 is formed with a scribing portion 31 including a substantially semi-circular valve cusp base forming portion 33 having a diameter as a sum of a nominal diameter (D1 to D8) defined for the diameter of a circular cylinder constituting the arcuate surface of a sizer block (G1 to G8) whose arcuate surface 24 conforms at both ends thereof to both of the commissure portions and an allowance for stitching margin (W), and a coaptation zone forming portion 34 in contiguous with the valve cusp base forming portion. |
