Patent ID: 7722549

Claim:
A medical instrument comprising: an elongate tubular sheath member having a diameter sufficiently small so that said sheath member is disposable in a channel of a flexed flexible endoscope, said sheath member having an opening at a distal tip, said opening extending in a plane at least partially transverse to a longitudinal axis of said sheath member; an elongate shaft member longitudinally passing through at least a substantial portion of said elongate tubular sheath member; an actuator handle subassembly with a manually actuated shifter member operatively connected to a proximal end of said elongate shaft member at least for longitudinally moving said shaft member; a camming subassembly operatively connected to said shaft member and to said shifter member at least for causing said elongate shaft member to rotate during an axial motion of said shaft member, wherein said camming subassembly comprises at least one key element and at least one corresponding cutout or guide element; and an operative element disposed at a distal end of said shaft member, said shifter member being operatively connected to said proximal end of said elongate shaft member, wherein an axial force applied to said shifter member shifting said shifter member in an axial direction causes said shaft member and said operative element to advance in an axial direction, while concurrently effecting an at least 360° degree rotation of said operative element.