ENDOVASCULAR TREATMENT ASSISTANCE TOOL

摘要

In the present invention, disclosed is an endovascular treatment assistance tool in which a filter does not get caught on a treatment device when being withdrawn. The treatment assistance tool includes a flexible shaft; a filter that is fixed to the shaft and can be opened and closed like an umbrella; a linear support member that connects an opening-side end portion of the filter and part of the shaft to each other, and that enables the filter to be closed through application of an external force to a base-end side of the support member; an elastomer member that is composed of an elastomer having a through hole (A), that is disposed further toward a base-end side than the opening of the filter such that the shaft penetrates through the through hole (A), and that is configured so that the external diameter of an end surface thereof including the through hole (A) when the filter is closed is larger than an external diameter of the opening side of the filter when the filter is closed; and an outer tube that has a through hole (B), and that is disposed further toward the base end side than the opening of the filter, with the shaft penetrating through the through hole (B) so that the shaft is moveable in a longitudinal direction. The elastomer member is fixed to a leading end side of the outer tube.