CPC A61M 25/09 (2013.01) [B23K 35/007 (2013.01); B23K 35/025 (2013.01); B23K 35/30 (2013.01); B23K 35/3006 (2013.01); B23K 35/3013 (2013.01); C22F 1/006 (2013.01); C22F 1/10 (2013.01); C22F 1/183 (2013.01); A61M 2025/09083 (2013.01); A61M 2025/09108 (2013.01); A61M 2025/09133 (2013.01); B23K 2103/05 (2018.08); B23K 2103/14 (2018.08); B23K 2103/26 (2018.08); C21D 7/02 (2013.01); C21D 2201/01 (2013.01); C21D 2211/001 (2013.01); C21D 2211/008 (2013.01)] | 14 Claims |
1. A shapeable medical device configured to allow a practitioner to shape a distal end to a desired shape for tracking through a patient's vasculature, the shapeable medical device comprising:
an elongate shaft member comprising:
an elongate proximal portion;
a distal portion extending distally from the elongate proximal portion, the distal portion comprising a distal end portion comprising a proximal end section and a practitioner-shapeable distal end section, wherein the proximal end section is formed of a material that does not exhibit superelasticity and the practitioner-shapeable distal end section (i) being formed of a nickel titanium alloy, (ii) in a martensite phase at body temperature and having a stress-strain curve without any flat plateau stresses, (iii) with a metallic material applied over and coating an entirety of the nickel titanium alloy and a portion of the proximal end section of the distal end portion, a proximal terminal end of the metallic material being distal a proximal terminal end of the proximal end section, (iv) such that the practitioner-shapeable distal end section does not exhibit a phase transformation or onset of stress-induced martensite as the practitioner-shapeable distal end section is stressed and is linear pseudoelastic;
a second distal portion between the proximal end section and the practitioner-shapeable distal end section, wherein the second distal portion between the proximal end section and the distal end section comprises a superelastic nickel-titanium alloy, and wherein (i) the proximal end section comprises a material that does not exhibit superelasticity and (ii) the distal end section is linear pseudoelastic;
a helical coil section disposed around at least the practitioner-shapeable distal end section; and
an atraumatic cap section attached to the helical coil section and the metallic material of the practitioner-shapeable distal end section,
wherein a portion of the helical coil is embedded in the atraumatic cap section and the practitioner-shapeable distal end section has a yield stress from 100 ksi to 300 ksi and exhibits 20% to 90% cold work.
|