Patent ID: 8241250

Claim:
A medical device comprising: (a) a substantially tubular hollow catheter having a distal end portion and a proximal end portion; (b) a sheath disposed coaxially about the catheter, the sheath comprising: (i) a distal end portion and a proximal end portion, wherein the distal end portion of the sheath is substantially fixed to the catheter at a fixation point to prevent relative rotation between the catheter and the sheath at the fixation point, (ii) a plurality of arms defined in the sheath proximally of the fixation point, wherein the plurality of arms are each provided in parallel and at an oblique angle to a longitudinal axis of the sheath, and the first ends of each of the plurality of arms are provided at equal distances from adjacent slots around the circumference of the sheath; (c) an actuatable member provided on one of the proximal end portion of the sheath or the proximal end portion of the catheter to provide relative rotation between the sheath and the catheter proximally of the fixation point; wherein the actuatable member comprises a first handle that extends radially from the proximal end portion of either the sheath or the catheter; wherein the other of the sheath or the catheter further comprises a second handle that extends radially from the proximal end portion of the other of the sheath or the catheter and includes a latch; and wherein rotation of the proximal end portion of the sheath relative to the proximal end portion of the catheter causes the plurality of arms to extend radially outward.