| 摘要 |
An implantable prosthetic heart valve with a suturing ring having an impermeable or semi-impermeable coating over at least a portion of the surface thereof to prevent tissue ingrowth in the coated area or areas. The suturing ring is formed of a biocompatible fabric tube of a mesh weave having interstices permeable to tissue ingrowth and first and second axial ends fastened into a torus shaped, suturing ring body having an interior directed minor surface adapted to be fitted against the exterior annular wall of a valve body and an outward directed major surface. An upper ring shaped surface is formed adjacent the upper edge of the valve body and a lower ring shaped surface adjacent the lower edge of the valve body. The intermediate band is intended to be sutured into contact with the heart tissue orifice. First and second impermeable layer of biocompatible material fill the interstices of the mesh weave in the upper and lower ring shaped surface area. A smooth transition is formed at the junction of the suturing ring with the valve body by filling the gaps at the suturing ring/valve body juncture with the same or similar type of blood compatible material. |
