US 12,295,595 B2
Aspiration catheter systems and methods of use
Scott D. Wilson, San Mateo, CA (US); Tony M. Chou, San Mateo, CA (US); Vera Shinsky, San Mateo, CA (US); and Philip Evard, San Mateo, CA (US)
Assigned to Route 92 Medical, Inc., San Mateo, CA (US)
Filed by Route 92 Medical, Inc., San Mateo, CA (US)
Filed on May 13, 2021, as Appl. No. 17/319,943.
Application 17/319,943 is a continuation of application No. 15/866,012, filed on Jan. 9, 2018, granted, now 11,020,133.
Claims priority of provisional application 62/607,510, filed on Dec. 19, 2017.
Claims priority of provisional application 62/444,584, filed on Jan. 10, 2017.
Prior Publication US 2021/0259718 A1, Aug. 26, 2021
Int. Cl. A61B 17/22 (2006.01); A61B 17/12 (2006.01); A61M 25/00 (2006.01); A61M 25/01 (2006.01); A61M 25/10 (2013.01); A61B 17/00 (2006.01)
CPC A61B 17/22 (2013.01) [A61B 17/12109 (2013.01); A61B 17/12136 (2013.01); A61M 25/0045 (2013.01); A61M 25/0052 (2013.01); A61M 25/01 (2013.01); A61M 25/10 (2013.01); A61B 2017/00243 (2013.01); A61B 2017/22079 (2013.01); A61B 2217/005 (2013.01); A61M 2025/0008 (2013.01); A61M 2205/584 (2013.01); A61M 2210/0693 (2013.01); A61M 2210/12 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method of performing a medical procedure in an intracranial vessel of a patient, the method comprising:
inserting a first catheter into a blood vessel of a patient;
inserting an assembled coaxial catheter system into the blood vessel of the patient through the first catheter, the assembled coaxial catheter system comprising:
a second catheter comprising:
a flexible distal luminal portion having a lumen; and
a proximal extension extending proximally from a point of attachment adjacent a proximal opening of the flexible distal luminal portion, wherein the proximal extension is less flexible than the flexible distal luminal portion and is configured to control movement of the second catheter; and
a catheter advancement element comprising:
a flexible elongate body having a tapered distal tip portion, a distal opening, and a single lumen,
wherein, when assembled, the catheter advancement element extends through the second catheter and the tapered distal tip portion extends distal to a distal end of the distal luminal portion;
advancing the assembled catheter system until the distal end of the distal luminal portion reaches a target site within the intracranial vessel and the point of attachment between the distal luminal portion and the proximal extension is positioned within a vessel proximal to the brachiocephalic take-off in the aortic arch;
removing the catheter advancement element from the lumen of the second catheter; and
removing occlusive material while applying a negative pressure to the lumen of the second catheter.