US 12,268,828 B2
Double concentric guidewire
Avraham Shekalim, Nesher (IL); and Noam Peleg, Gan Ner (IL)
Assigned to CARDIOSERT LTD., Nesher (IL)
Appl. No. 15/748,658
Filed by MICROBOT MEDICAL LTD., Caesarea (IL)
PCT Filed Aug. 18, 2016, PCT No. PCT/IL2016/050907
§ 371(c)(1), (2) Date Jan. 30, 2018,
PCT Pub. No. WO2017/033182, PCT Pub. Date Mar. 2, 2017.
Claims priority of provisional application 62/208,715, filed on Aug. 23, 2015.
Prior Publication US 2018/0214675 A1, Aug. 2, 2018
Int. Cl. A61M 25/09 (2006.01)
CPC A61M 25/09041 (2013.01) [A61M 2025/09083 (2013.01); A61M 2025/09116 (2013.01); A61M 2025/0915 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A double guidewire comprising:
a) a first guidewire comprising an elongated flexible shaft and having a distal portion that terminates in a distal tip, said distal portion of said first guidewire comprising a deflectable helical coil, said first guidewire being a hollow guidewire having a central lumen extending along a length of said first guidewire;
b) a second guidewire comprising an elongated flexible shaft and having a distal portion that terminates in a distal tip, said distal portion of said second guidewire comprising a deflectable helical coil, said second guidewire being deployed within said central lumen of said first guidewire, wherein the distal tips of the first guidewire and the second guidewire are distinct; and
c) an adjuster mechanism mechanically linked to a proximal portion of at least said second guidewire, said adjuster mechanism being operable to displace said second guidewire longitudinally relative to said first guidewire between at least:
i) a first state in which said distal tip of said second guidewire is adjacent to said distal tip of said first guidewire,
ii) a second state in which at least part of said distal portion of said second guidewire is advanced beyond the distal tip of said first guidewire; and
iii) a third state in which said distal tip of said second guidewire is withdrawn proximally along said central lumen of said first guidewire so as to leave empty a part of said central lumen of said first guidewire along at least part of said distal portion of said first guidewire;
wherein a region of said distal portion of each of said first and said second guidewires is preshaped to impart a lateral deflection from a longitudinal axis of the elongated flexible shaft of said first and said second guidewires, respectively,
wherein, advancing said second guidewire proximally along said central lumen of said first guidewire, from said third state to said first state, results in a reduction of a lateral deflection of said double guidewire, and results in at least partial overlap of the deflected portions of the first and second guidewires.