Expandable medical retrieval device and related methods of use

A medical device, comprising:

• a sheath including a lumen, a distal end, and a proximal end;
• and
• an elongate member including an expansible member connected to a distal portion of the elongate member, the elongate member and expansible member being movable relative to the sheath to achieve a first state of the expansible member when the expansible member is within the lumen of the sheath and an expanded state when the expansible member extends from the distal end of the sheath,
• wherein the expansible member comprises a sponge.

A method for immobilizing material in a body comprising:

• providing a medical device comprising:
• a sheath including a lumen, a distal end, and a proximal end;
• and
• a elongate member including an expansible member connected to a distal portion of the elongate member, the elongate member and expansible member being movable relative to the sheath to achieve a first state of the expansible member when the expansible member is within the lumen of the sheath and an expanded state when the expansible member extends from the distal end of the sheath,
• wherein the expansible member comprises a material that expands to the expanded state due to the presence of fluid.
• inserting the medical device into an anatomical lumen of the body, with the expansible member of the medical device in a collapsed configuration;
• positioning the distal end of the sheath beyond the material to be immobilized;
• and
• moving the sheath relative to the elongate member and expansible member, such that the expansible member is expanded to the expanded state outside the distal end of the sheath and at least partially occludes the anatomical lumen.