Patent ID: 9339628
Filing Date: 2016-05-17
CPC Classification: A61M

Claim Text:
1. A microcatheter, comprising: a catheter shaft having a proximal end; a hub coupled to the proximal end of the catheter shaft; wherein the catheter shaft includes a nickel-titanium alloy tubular member and a multi-layer liner disposed along an inner surface of the nickel-titanium alloy tubular member; wherein a portion of the multi-layer liner is radially spaced from the inner surface of the nickel-titanium alloy tubular member and a portion of the multi-layer liner is in direct contact with the inner surface of the nickel-titanium alloy tubular member, wherein the multi-layer liner is connected to the inner surface of the nickel-titanium alloy tubular member at discrete attachment points; wherein the portion of the nickel-titanium alloy tubular member that is in direct contact with the liner has a first outer diameter and the portion that is radially spaced from the liner has a second outer diameter different from the first outer diameter, wherein the portion with a smaller diameter has a length of about 15 cm to about 150 cm; wherein the multi-layer liner has a distal portion disposed distal of a distal end of the nickel-titanium alloy tubular member and has a proximal portion disposed proximal of a proximal end of the nickel-titanium alloy tubular member; a polymeric tip member attached to the distal portion of the multi-layer liner; and a coating disposed along an outer surface of the nickel-titanium alloy tubular member.