Processed tissue for medical device formation
First Claim
1. A method for processing tissue, the method comprising applying a sufficient directional load to the tissue to increase the rigidity of the tissue asymmetrically relative to an unaligned tissue equivalently processed that is not subjected to the load.
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Abstract
In some embodiments, a method for processing tissue comprises the application of a directional load to modify the properties of the tissue. In particular, the directional force is sufficient to increase the rigidity of the tissue asymmetrically relative to an unaligned tissue equivalently processed without being subjected to a load. In some embodiments, a sufficient directional load is applied to increase the rigidity of the tissue relative to an unaligned tissue equivalently processed that is not subjected to the load, in which the load is applied with a load applicator. A connector transfers the load from the load applicator to the tissue. Selectively aligned tissue having asymmetric mechanical properties can be used to form a prosthetic valve. The leaflets are matched with respect to each of their properties to have improved coaptation relative to corresponding tissue leaflets with symmetrical mechanical properties.
183 Citations
61 Claims
- 1. A method for processing tissue, the method comprising applying a sufficient directional load to the tissue to increase the rigidity of the tissue asymmetrically relative to an unaligned tissue equivalently processed that is not subjected to the load.
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21. A method for processing tissue, the method comprising applying a sufficient load to the tissue to increase the rigidity of the tissue relative to an unaligned tissue equivalently processed that is not subjected to the load, wherein a load applicator applies the load to the tissue and wherein a connector transfers load from the load applicator to the tissue.
- 22. A method for forming a prosthetic valve, the method comprising assembling a plurality of leaflets to form a valve, wherein the tissue leaflet comprises selectively aligned tissue having asymmetric mechanical properties.
- 34. Biocompatible tissue comprising selectively aligned tissue having an asymmetric flexibility, wherein the tissue comprises pericardial tissue, amniotic sac tissue, blood vessel tissue, cartilage, dura mater tissue, skin tissue, fascia tissue, submucosa tissue, or umbilical tissue.
- 44. A prosthetic valve comprising a plurality of tissue leaflets wherein the tissue leaflets comprise selectively aligned tissue.
- 52. An apparatus comprising tissue and a load applicator that applies a selected mechanical load to the tissue, wherein the load applicator comprises a gripper that grips adjacent a selected subsection of an edge of the tissue that does not approximate gripping the edge equally around the tissue.
Specification