Patent ID: 8177800

Claim:
A device for cutting tissue, comprising: a surgical instrument having a distal end configured for subcutaneous insertion into a patient's tissue and positioning in proximity of the tissue, the surgical instrument including a cylindrical outer tube defining a lumen, and having an outer tube aperture extending through the cylindrical outer tube, a cylindrical inner tube located within the cylindrical outer tube, and having an inner tube aperture extending through the cylindrical inner tube, the cylindrical inner tube being movable relative to the cylindrical outer tube to cut tissue, a cutter comprised of a cutting edge located on the outer tube aperture extending through the cylindrical outer tube and a corresponding cutting edge located on the inner tube aperture extending through the cylindrical inner tube, a light path supported by the surgical instrument and configured for directing light at a region adjacent the cutter and from underneath the tissue or from a side of the tissue, at a skin layer overlying the tissue, in order to observe the tissue through said skin layer, and a fluid supply line supported by the surgical instrument, for conducting fluid from a fluid supply apparatus to the distal end of the surgical instrument, said fluid supply line being formed by a gap between the cylindrical inner tube and the cylindrical outer tube.