Patent ID: 8834776
Filing Date: 2014-09-16
Classification: A61L,B29C,B29K,B29L

Abstract:
1. A method of making a bioabsorbable stent comprising: providing a PLLA polymer scaffolding, wherein the PLLA polymer scaffolding has an Mn of at least 250 kDa; exposing the scaffolding to a first radiation dose prior to crimping to reduce the Mn; crimping the exposed scaffolding to a reduced diameter over a delivery balloon; and exposing the crimped scaffolding to a second radiation dose of 20-31 kGy for sterilization which reduces the Mn to an Mn(0), wherein the Mn(0) provides a degradation time of 16-20 months and a time of loss of radial strength of at least about 3 months.