Abstract: An optical plug connector device includes at least one lens array and at least one fiber holder, which is designed to position end regions of a plurality of optical fibers relative to the lens array, and which has at least one first fiber holding element wherein the fiber holder comprises at least one second fiber holding element having a higher manufacturing precision than the first fiber holding element.

Abstract: A biscuspate cardiac valve prosthesis for use in human clinical medicine as a mitral valve graft. The valve has a support ring with an arched crosspiece containing apertures or a single longitudinal aperture along its length, joined at its ends to the lower portion of the support ring. Valve flaps are attached to both sides of the crosspiece, the opposite edges of the flaps being able to move freely during functioning of the valve. When the valve is closed, the flaps abut the inner surface of the support ring in a low dome profile.