Loop dissector
A device includes a tube and a filament. The tube has a first end, a second end, and a center axis disposed between the first end and the second end. The filament is disposed at the first end and having a portion configured as a loop aligned on an extension of a lumen of the tubular segment. A portion of the filament is configured for axial movement within the lumen.
1 . A device for blunt dissection of a tissue comprising:
a tube having a first end, a second end, and a center axis disposed between the first end and the second end; and
a filament disposed at the first end and having a portion configured as a loop aligned on an extension of a lumen of the tube, wherein a portion of the filament is configured for axial movement within the lumen, wherein the loop has an edge that is blunt for the blunt dissection of the tissue;
wherein the filament lies substantially in a plane, and wherein the plane is disposed at an oblique angle relative to the center axis; and
wherein the axial movement of the filament along the center axis relative to the tube causes the plane to raise and lower without a change in the oblique angle.
2 . The device of claim 1 wherein the filament includes a band.
3 . The device of claim 1 wherein the filament includes a metal.
4 . The device of claim 1 wherein the filament has a triangular shape in cross-section with the edge formed by an apex of the triangular shape, wherein the apex has a radius.
5 . The device of claim 1 wherein the edge is a rounded edge.
6 . The device of claim 1 wherein the filament includes a round cross section.
7 . The device of claim 1 wherein the filament is flexible.
8 . The device of claim 1 wherein the filament includes a shape memory material.
9 . The device of claim 1 wherein the portion includes a first segment and a second segment and wherein the first segment is at an obtuse angle relative to the second segment.
10 . The device of claim 1 wherein the second end is coupled to a manual actuator tool.
11 . The device of claim 1 wherein the filament has an end coupled to a manual actuator tool.
12 . The device of claim 1 wherein the first end includes a ferrule.
13 . The device of claim 1 wherein the tube includes a handle.
14 . A device for blunt dissection of a tissue comprising:
a tube having a lumen on a longitudinal axis;
a filament having a first end and a second end separated by a segment and configured for movement in a first direction aligned parallel with the longitudinal axis and at least a first portion of the filament disposed in the lumen; and
wherein the segment is clear of the lumen and configured as a loop;
wherein the segment for the loop has an edge that is blunt for the blunt dissection of the tissue; and
wherein elasticity of the filament in a second direction aligned parallel to a plane of the segment is less than elasticity of the filament in a third direction aligned normal to the plane.
15 . The device of claim 14 wherein the first end is configured for movement in the first direction.
16 . The device of claim 14 wherein the second end is clear of the lumen.
17 . The device of claim 14 wherein the second end is disposed in the lumen.
18 . The device of claim 14 wherein the second end is affixed to the tube.
19 . The device of claim 14 wherein the filament includes a band.
20 . The device of claim 14 wherein the filament includes a semi-circular section.
21 . The device of claim 14 wherein the segment is curved.
22 . The device of claim 14 wherein the segment lies substantially in a plane.