Filter Screen Sheath

Abstract

The present application relates to a filter screen sheath. The filter screen sheath includes an outer sheath tube and a filtering member capable of moving axially relative to the outer sheath tube; the filtering member includes a filter screen and a frame; the filter screen is provided with a proximal opening and a distal opening; the distal opening is communicated with a tube cavity of the outer sheath tube through the proximal opening; the frame includes a traction wire, a proximal supporting ring, and a distal supporting ring; the proximal supporting ring is connected to the proximal opening of the filter screen; the distal supporting ring is connected to the distal opening of the filter screen; and the traction wire is connected to the proximal supporting ring. The filter screen sheath of the present application allows a treatment instrument to pass through the filtering member, and the filtering member can capture an embolus in a blood vessel during treatment with the treatment instrument, thereby improving surgical safety.

Dependencies are inferred from the claim text.