Medical device

A method for capturing a target present inside a living body, the method comprising:

• inserting an accommodation unit into the living body, the accommodation unit including a lumen for accommodating the target present inside the living body, and a distal opening portion and a proximal opening portion which respectively communicate with the lumen;
• causing a fluid to flow with an impeller holding unit that includes an impeller having a shaft portion and multiple blades, and wherein each of the multiple blades is longitudinally twisted from a distal side to a proximal side based on a rotation axis so that a rotation of the shaft portion by a motor causes the fluid to flow from the distal opening portion toward the proximal opening portion inside the living body so as to allow the lumen to aspirate the target together with the fluid, and wherein the impeller holding unit is configured to be attachable to and detachable from the accommodation unit on a proximal side of the accommodation unit;
• capturing at least one or more targets with multiple filters provided along an axial direction in which the fluid flows, wherein the multiple filters are arranged in the accommodation unit and/or the impeller holding unit;
• adjusting an arrangement of a first filter of the multiple filters and an arrangement of a second filter of the multiple filters along the axial direction in which the fluid flows inside the living body and/or along a circumferential direction of the lumen;
• and
• arranging a drive cylinder of the drive unit inside of the second cylinder of the accommodation unit and configured to be rotatable between the second cylinder and the impeller in the impeller holding unit, and wherein the second filter is joined to the distal opening of the drive cylinder.

A medical device comprising:

• an accommodation unit that includes a lumen for accommodating a capturing target present inside a living body, and a distal opening portion and a proximal opening portion which respectively communicate with the lumen;
• an impeller holding unit that includes an impeller, wherein the impeller includes a shaft portion and multiple blades, and wherein each of the multiple blades is longitudinally twisted from a distal side to a proximal side based on a rotation axis so that a rotation of the shaft portion causes a fluid to flow from the distal opening portion toward the proximal opening portion inside the living body so as to allow the lumen to aspirate the capturing target together with the fluid;
• multiple filters provided along an axial direction in which the fluid flows and configured to capture at least one or more of the capturing target, and wherein the multiple filters are arranged in the accommodation unit and/or the impeller holding unit;
• a drive unit configured to adjust an arrangement of a first filter of the multiple filters and an arrangement of a second filter of the multiple filters along the axial direction in which the fluid flows inside the living body and/or along a circumferential direction of the lumen;
• and
• a drive cylinder of the drive unit arranged inside of the second cylinder of the accommodation unit and configured to be rotatable between the second cylinder and the impeller in the impeller holding unit, and wherein the second filter is joined to the distal opening of the drive cylinder.