Patent ID: 7905856

Claim:
A surgical introducer sheath comprising: a first member having a first longitudinally extending lumen configured and dimensioned to receive a surgical instrument therethrough, the first member having first and second axially displaced side holes for blood flow for dialysis; a second member having a second longitudinally extending lumen configured and dimensioned to receive the first member, wherein the second member has third and fourth axially displaced side holes for blood flow for dialysis, the second member having a distal portion and being rotatable with respect to the first member, the first and third side holes being axially aligned and the second and fourth side holes being axially aligned; and a retainer attached adjacent the distal portion of the second member and spaced proximally of a distalmost edge of the second member and a tubular region of the second member extends distally of the retainer and terminates in a distal opening, the retainer movable from a first retracted position to a second extended position to limit proximal movement of the introducer sheath, the retainer movable in response to movement of the second member; wherein rotational movement of the second member in a first direction moves the retainer to the extended position and rotational movement of the second member in a second direction moves the retainer to a retracted position, wherein the first and third side holes and the second and fourth side holes of the first and second members are in axial alignment and out of radial alignment when the retainer is in the retracted position and the first and third side holes and the second and fourth side holes remain in axial alignment and are moved into radial alignment when the second member is rotated to move the retainer into the extended position.