US 11,672,957 B2
Resilient tip and method
Jack Dant, St. Paul, MN (US); Mark Erie, Chaska, MN (US); David Johnson, Saint Louis Park, MN (US); Trent Birkholz, Excelsior, MN (US); Douglas Pletcher, Minneapolis, MN (US); Jason Albers, Crystal, MN (US); and Michael Grimm, Bad Vilbel (DE)
Assigned to Heraeus Medical Components LLC, St. Paul, MN (US); and Heraeus Deutschland GmbH & Co. KG, Hanau (DE)
Filed by Heraeus Medical Components LLC, St. Paul, MN (US); and Heraeus Deutschland GmbH & Co. KG, Hanau (DE)
Filed on Jul. 26, 2018, as Appl. No. 16/45,950.
Claims priority of provisional application 62/643,929, filed on Mar. 16, 2018.
Claims priority of provisional application 62/537,162, filed on Jul. 26, 2017.
Prior Publication US 2019/0030300 A1, Jan. 31, 2019
Int. Cl. A61M 25/09 (2006.01)
CPC A61M 25/09 (2013.01) [A61M 2025/09075 (2013.01); A61M 2025/09108 (2013.01); A61M 2025/09141 (2013.01); A61M 2025/09175 (2013.01); A61M 2205/0266 (2013.01); A61M 2207/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A medical guidewire comprising:
a core wire comprising a proximal end extending out to a distal end; and
a resilient portion coupled to and overlapping with the distal end of the core wire at a distal tip section of the guidewire;
wherein the resilient portion comprises a superelastic material and comprises a first and a second resilient segment; and
wherein each of the first and second resilient segments of the resilient portion comprise a one-piece, non-coiled section of resilient material, at least part of which is oriented parallel to the core wire, wherein the first and second resilient segments are attached to the core wire exclusively at an outer surface of the core wire and are staggered relative to each other, wherein there is surface contact between the first resilient segment and the core wire over an entire overlapping portion of the first resilient segment and the core wire and surface contact between the second resilient segments and the core wire over an entire overlapping portion of the second resilient segments and the core wire, and wherein the one-piece, non-coiled sections of the first and second resilient segments increase pushability and increase the ability pushability to withstand prolapse with minimal kinking in the distal tip section.