Devices, systems, and methods for removing obstructive material from body lumens

A device, the device comprising:

• an elongated shaft having a proximal portion, a distal portion, and a lumen extending therebetween, wherein the distal portion of the elongated shaft is configured to be positioned at a treatment site within a lumen of a blood vessel;
• and
• a distal housing having a first end region coupled to the distal portion of the elongated shaft, a second end region, and a longitudinal axis extending therebetween, wherein the distal housing is configured to expand to a cross-sectional dimension greater than a cross-sectional dimension of the elongated shaft,
• wherein the distal housing comprises a wall having a longitudinal portion extending between the first end region and the second end region, and an engagement portion extending radially inwardly from the longitudinal portion at the second end region and having an aperture extending therethrough,
• wherein, at least when the distal housing is in an expanded state, the longitudinal portion and engagement portion together enclose an interior region configured to receive an obstructive material, and
• wherein the engagement portion is configured to flex inwardly into the interior region and deform in response to engagement with the obstructive material, and wherein such deformation causes the aperture to enlarge.

A device, the device comprising:

• an enclosure configured to be positioned at a treatment site within a pulmonary blood vessel lumen proximate a clot material, the enclosure having a first end region configured to be carried by a distal portion of an elongated shaft, a second end region, and a longitudinal axis extending therebetween, wherein the enclosure is configured to expand at the treatment site to a cross-sectional dimension greater than a cross-sectional dimension of the elongated shaft,
• wherein the enclosure comprises a fluid impermeable wall that, at least when the enclosure is in an expanded state, defines an interior region and has:
• (a) a main body extending between a proximal end at the first end region and a distal end, (b) a clot-engaging face extending across the distal end of the main body and coinciding with the second end region of the enclosure, and (c) an aperture extending through the clot-engaging face,
• wherein the clot-engaging face is configured to flex inwardly into the interior region and stretch in response to engagement with the clot material to enlarge the aperture to allow clot into the enclosure.