US 11,771,875 B2
Catheter systems and methods for medical procedures using catheters
Adel M. Malek, Weston, MA (US); Carl Heilman, Wayland, MA (US); David A. Rezac, Westborough, MA (US); Jack B. Sattell, Boston, MA (US); and Alexander Bonin, Bellingham, MA (US)
Assigned to CereVasc, Inc., Auburndale, MA (US)
Appl. No. 16/489,624
Filed by CereVasc, Inc., Auburndale, MA (US)
PCT Filed Mar. 2, 2018, PCT No. PCT/US2018/020667
§ 371(c)(1), (2) Date Aug. 28, 2019,
PCT Pub. No. WO2018/160966, PCT Pub. Date Sep. 7, 2018.
Application 16/489,624 is a continuation in part of application No. PCT/US2017/056227, filed on Oct. 11, 2017.
Claims priority of provisional application 62/473,729, filed on Mar. 20, 2017.
Claims priority of provisional application 62/466,272, filed on Mar. 2, 2017.
Prior Publication US 2020/0069927 A1, Mar. 5, 2020
Int. Cl. A61M 27/00 (2006.01); A61M 25/00 (2006.01); A61F 2/95 (2013.01)
CPC A61M 27/006 (2013.01) [A61M 25/0051 (2013.01); A61M 25/0053 (2013.01); A61M 25/0054 (2013.01); A61F 2002/9528 (2013.01); A61M 2025/0042 (2013.01); A61M 2025/0047 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A catheter device comprising:
a reinforcing member having a proximal end and a distal end and defining a central opening therebetween, the reinforcing member comprising:
a plurality of discrete longitudinally arranged structural regions disposed between the proximal end and the distal end and comprising:
a first structural region, disposed at or near the proximal end and defining a first series of wall perforations setting a first stiffness of the first structural region, the first series of wall perforations having a pitch of about 0.014 inches to about 0.018 inches and a cut frequency of about 2 to about 3 cuts per rotation;
a second structural region, disposed distally relative to the first structural region and defining a second series of wall perforations setting a second stiffness of the second structural region, the second series of wall perforations having a pitch starting at about 0.014 inches to about 0.018 inches and decreasing to about 0.003 inches to about 0.007 inches and a cut frequency of about 2 to about 3 cuts per rotation;
a third structural region, disposed distally relative to the second structural region and defining a third series of wall perforations setting a third stiffness of the third structural region, the third series of wall perforations having a pitch starting at about 0.008 inches to about 0.012 inches and decreasing to about 0.002 inches to about 0.006 inches and a cut frequency of about 1 to about 2 cuts per rotation;
a fourth structural region, disposed distally relative to the third structural region and defining a fourth series of wall perforations setting a fourth stiffness of the fourth structural region, the fourth series of wall perforations having a pitch of about 0.002 inches to about 0.006 inches and a cut frequency of about 1 to about 2 cuts per rotation; and
a distal structural region substantially free of perforations and disposed distally relative to the fourth structural region.