US 11,832,830 B2
Devices, systems, and methods for a coated coil
Ajay Gupta, Minneapolis, MN (US); Daniel K. Tomaschko, Savage, MN (US); and Steven L. Kangas, Woodbury, MN (US)
Assigned to Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed by Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed on Nov. 18, 2021, as Appl. No. 17/530,031.
Claims priority of provisional application 63/115,898, filed on Nov. 19, 2020.
Prior Publication US 2022/0151628 A1, May 19, 2022
Int. Cl. A61B 17/12 (2006.01); A61L 31/10 (2006.01); A61L 31/16 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/1215 (2013.01) [A61B 17/12113 (2013.01); A61L 31/10 (2013.01); A61L 31/16 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/00938 (2013.01); A61B 2017/00942 (2013.01); A61L 2300/418 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An embolic system, comprising:
a microcatheter comprising a proximal end, a distal end, a longitudinal axis, and a working lumen therethrough;
a sheath comprising a proximal end, a distal end, and a delivery lumen therethrough, the distal end of the sheath configured to be insertable within the working lumen at the proximal end of the microcatheter;
a coil comprising a proximal end, a distal end, and a length therebetween slidingly disposed within the sheath;
a coating disposed about the coil; and
a delivery filament configured to be slidingly disposed within the sheath proximal of the coil such that the coil can be ejected from the distal end of the sheath into the working lumen of the microcatheter and configured to be slidingly disposed within the working lumen of the microcatheter proximal of the coil such that the coil can be ejected from the working lumen at the distal end of the microcatheter to a target site;
wherein the coating is configured to substantially fracture as the coil transitions from being substantially aligned with the longitudinal axis of the microcatheter to substantially misaligned with the longitudinal axis of the microcatheter upon being ejected from the microcatheter or,
wherein the coil comprises a primary shape that is substantially linear when disposed within the microcatheter and a secondary shape that is substantially curvilinear when ejected from the microcatheter to the target site, and
wherein the coating is configured to substantially fracture away from the coil as the coil transitions from the primary shape to the secondary shape.