Radio-opaque marker for medical implants

摘要

A radio-opaque marker for medical implants comprising between 10 and 90 weight percent of a biodegradable base component, between 10 and 90 weight percent of one or more radio-opaque elements selected from the consisting of I, Au, Ta, Y, Nb, Mo, Ru, Rh, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir and Bi as a marker component and 10 weight percent of residual components, the aforementioned components amounting to 100 weight percent.

主权项

1. A radiopaque marker for medical implants comprising:
a) 10 to 90 weight-percent of a biodegradable base component consisting essentially of an alloy and capable of degrading in situ over a medically useful period of time; b) 10 to 90 weight-percent of a marker component comprising one or more radiopaque elements selected from the group consisting of I, Au, Ta, Y, Nb, Mo, Ru, Rh, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, W, Re, Os, Ir, and Bi, wherein the radiopaque elements comprise at lest 90 weight-percent Ta, the marker component comprising fine particles; and, c) less than or equal to 10 weight-percent residual components, the components cited adding up to 100 weight-percent, wherein as the base component degrades the marker component particles are excreted without appreciable absorption into surrounding tissue.