CPC A61M 25/0009 (2013.01) [A61M 25/0045 (2013.01); A61B 2017/1205 (2013.01); A61F 2/95 (2013.01); A61M 2025/0042 (2013.01); A61M 2025/0047 (2013.01); A61M 25/005 (2013.01); A61M 2025/0062 (2013.01)] | 20 Claims |
1. A method of making a catheter, the method comprising:
longitudinally stretching a portion of a PTFE tube having an initial length to a longer length that is 25% to 100% longer than the initial length of the portion to create a PTFE liner, wherein the PTFE liner has a tensile strength greater than 20 kilopound per square inch (kpsi), wherein the catheter is configured to deploy an expandable device, and wherein an internal surface of the PTFE liner has a radial coefficient of friction of 0.07 to 0.25 with respect to the expandable device, the radial coefficient of friction being a ratio of a radial force exerted by the expandable device on the PTFE liner to a force required to pull the expandable device through the PTFE liner when the expandable device is positioned within the catheter;
wrapping a coil over at least a segment of the PTFE liner; and
disposing a sheath over the coil.
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