Medical device for collecting substances inside a body lumen

A medical device for collecting substances inside a body lumen, the medical device comprising:

• an elongated shaft portion;
• a deformation portion formed from multiple interwoven wires, the deformation portion including a tubular filter portion and a tubular support portion, the tubular filter portion configured to be deformable in an expanded state where the filter portion has a basket shape so as to form a concave portion, and deformable from the expanded state to a contracted state where an opening end portion of the concave portion is contracted and the tubular support portion having an interlock portion interlocked with the opening end portion of the filter portion and a support side connection portion connected to the elongated shaft portion, and wherein the support portion includes a gap larger than gaps of the filter portion;
• the filter portion and the support portion are continuously formed with the same interwoven wires in each of the filter portion and the support portion, and wherein a pitch of the respective multiple interwoven wires in the support portion in a winding in an axial direction of the respective multiple interwoven wires is longer than a pitch in the winding in the axial direction of the respective multiple interwoven wires of the respective multiple interwoven wires in the filter portion, and an axial length of respective gaps formed in the support portion is longer than an axial length of respective gaps formed in the filter portion, and wherein the multiple interwoven wires of the filter portion and the support portion include a proximal end attached to the support side connection portion and a distal end attached to a filter side connection portion;
• the support side connection portion having an inner tube and an outer tube, and the multiple interwoven wires of the support portion are fixed between the inner tube and the outer tube, and wherein the inner tube of the support side connection is fixed to the elongated shaft portion;
• a tubular sheath that accommodates the filter portion and the support portion in the contracted state and that prevents the filter portion and the support portion from being deformed to the expanded state;
• in the expanded state, the support side connection portion is configured to be located in the concave portion, and in the contracted state, the interlock portion is configured to contract with the opening end portion, and the support side connection portion is configured to be located away from the filter portion so as to protrude outwardly from the concave portion;
• the elongated shaft portion is configured to guide an aspiration catheter to the concave portion of the filter portion;
• and
• wherein at least a portion of the filter portion, the support portion, and the shaft portion has an X-ray contrast property.