Neurovascular access catheters and methods of use

An intravascular catheter, comprising:

• a tubular sidewall having a longitudinal axis, the sidewall comprising:
• a coil portion comprising an elongate filament wrapped around the longitudinal axis of the sidewall;
• and
• a braid portion comprising:
• first wires and second wires, wherein:
• the first wires have a first cross-sectional area and are helically wrapped around the longitudinal axis in a first direction without crossing over one another, and
• the second wires have a second cross-sectional area less than the first cross-sectional area, wherein the second wires comprise (a) a first group wound in the first direction and that do not cross over the first wires, and (b) a second group wound in a second direction opposite the first direction, and wherein the wires in the second group are interwoven with the first wires and the first group of the second wires.

An intravascular catheter, comprising:

• a proximal end, a distal end, and a longitudinal axis extending therebetween;
• a tubular sidewall defining a lumen, the sidewall comprising a coil and a braid embedded in a material, the braid comprising a plurality of wires that include first wires and second wires, wherein:
• the first wires are helically wrapped around the longitudinal axis in a first direction without crossing over one another, the first wires being configured to resist radial collapse of the sidewall, and
• the second wires comprise (a) a first group wound in the first direction and that do not cross over the first wires, and (b) a second group wound in a second direction opposite the first direction, wherein the second wires are configured to engage the first wires to resist radial expansion of the first wires, thereby providing improved torqability of the sidewall,
• wherein the proximal end of the catheter is configured to be fluidly coupled to a negative pressure source for application of suction through the lumen.