Tension member routing elements in transcatheter stented prosthesis tensioning system

A delivery device for delivering a stented prosthesis to a target site, the delivery device comprising:

• a distal portion configured to retain the stented prosthesis, the distal portion comprising a plurality of tiers extending along a length of the distal portion, the plurality of tiers comprising a first tier comprising a first length and a first lumen extending along the first length to a first distal aperture, the first lumen defined by a circumferential wall of the first tier surrounding an axis of the first tier, a second tier comprising a second length and a second lumen extending along the second length to a second distal aperture, the second tier comprising a second wall at least partially defining the second lumen, and the second wall of the second tier contacts and is attached to the circumferential wall of the first tier along the second length, wherein the second length is less than the first length such that the second distal aperture is proximally spaced from the first distal aperture to stagger the first distal aperture and the second distal aperture along the length of the distal portion, and wherein the plurality of tiers comprises a third tier comprising a third length and a third lumen extending along the third length to a third distal aperture, wherein the third length is less than the second length such that third distal aperture is proximally spaced from the second distal aperture to stagger the first distal aperture, the second distal aperture, and the third distal aperture along the length of the distal portion.