A dual lumen aspiration catheter system with an aspiration catheter, a hub
and a flexible strain relief, and a suction assembly. The aspiration
catheter includes multiple successively connected flexible tubular
components each increasing in relative flexibility in the distal
direction, the most proximal tubular component connectingly extending
from the hub and through the flexible strain relief. The tubular
components of the aspiration catheter include, in order proximally to
distally, a composite tube, an intermediate tube, a dual lumen tube, and
a flexible tip tube. The dual lumen tube includes eccentrically
co-located large and small tubular portions forming eccentrically
co-located large and small lumens to provide a minimum cross section. The
distal end of the dual lumen tube includes a convex beveled edge. The
convex beveled edge and the flexible tip tube singly or jointly inflict
minimal traumatic contact with a vessel wall when urged along a tortuous
vascular path.