| 摘要 |
A sizing gauge for determining the proper size of heart valve for implantation in a natural heart valve orifice. The sizing gauge includes a handle which can be gripped by a surgeon, a sizing ring having a smooth outer surface and a hollow interior, and connecting struts connecting the sizing ring and the handle. The connecting struts is so constructed and arranged as to afford direct visual observation by the surgeon of heart tissue beyond the sizing ring when the latter is inserted in a heart orifice. Outer surfaces of the connecting struts diverge forwardly for connection to the sizing ring and merge with the outer surface of the sizing ring to permit the latter to be eased outwardly through the natural heart valve orifice. |
