US 11,944,759 B2
Catheter including variable stress relief structural support member
Syamala Rani Pulugurtha, Irvine, CA (US); Gopan Patel, Orange, CA (US); and Ujwal Jalgaonkar, Irvine, CA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on May 5, 2021, as Appl. No. 17/308,783.
Prior Publication US 2022/0355067 A1, Nov. 10, 2022
Int. Cl. A61M 25/00 (2006.01)
CPC A61M 25/005 (2013.01) [A61M 25/0012 (2013.01); A61M 2205/0266 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A catheter, comprising:
an inner liner;
an outer jacket; and
a structural support member positioned between at least a portion of the inner liner and at least a portion of the outer jacket,
wherein a first portion of the structural support member has a first residual stress and a second portion of the structural support member has a second residual stress, greater than the first residual stress,
wherein the second portion of the structural support member comprises a percent cold work greater than about 20%, and
wherein a thermal degradation temperature of at least one of the inner liner or the outer jacket is greater than a heat treatment temperature of the structural support member sufficient to relieve at least a portion of the second residual stress.