A sheath includes a sheath body, an inflow port at a proximal end of the sheath body, an outflow port at the proximal end of the sheath body, and a plurality of radially expandable flexible members which extend along a length of the sheath body. The plurality of radially expandable flexible members are attached to the sheath body at a plurality of anchor points along the length of the sheath body. The plurality of radially expandable flexible members expand during active fluid inflow. The radially expandable flexible members are spaced apart along the sheath body to define one or more isolated spaces that extend between adjacent radially expandable flexible members when the radially expandable flexible members are inflated within a body passage.
