This sizer is designed to simulate the insertion of heart valve prosthetics into 3d printed patient phantoms. It is loosely based on the size specifications of a Sapien XT valve (adjustable diameter ranging across 20 - 29 mm, with adjustments to 23, 26 and 29 mm; fixed height of 16 mm). The basic design of the sizer includes a central stud and an expandable cylindrical simulated valve. Rotation of the central stud clockwise and counter-clockwise causes the simulated valve to expand and contract respectively, thus simulating multiple diameters in succession.

Hardware

Additional hardware parts need to be pruchased for the complete assembly:

1. The central stud x1 (https://www.mcmaster.com/#94455a344/=19b9ya1)
2. The left-turning end nut x1 (https://www.mcmaster.com/#99891a120/=19bau20)
3. The right-turning end nut x1 (https://www.mcmaster.com/#95462a031/=19baumu)
4. Aluminum flashing 0.0078 inch thickness or similar