A surgical instrument includes a first member that has {HEAD ~ an opening} in its distal region for admitting tissue and that is rotatable with respect to a base from which the first member extends to allow the rotational orientation of {TAIL ~ the opening} to be selectively changed with respect to the axis of the instrument 
A surgical instrument includes a first member that has { HEAD ~ an opening } in its distal region for admitting tissue and that is rotatable with respect to a base from which the first member extends to allow the rotational orientation of { TAIL ~ the opening } to be selectively changed with respect to the axis of the instrument
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH