Surgical punch apparatus

A surgical punch apparatus comprising in combination:

• an elongated hollow support sleeve having two end portions;
• a removably attached annular cutter blade attached to one end portion of said elongated hollow support sleeve and having an axial passage therethrough;
• an elongated rod slidably mounted in said hollow support sleeve;
• a movable cutter blade fixedly attached to one end of said elongated rod and slidable with said rod in said sleeve, said movable cutter blade being disc-shaped with an annular cutting edge and shaped to slide into the passage in said removably attached cutter blade;
• handle means attached to said elongated rod and extending through openings in said elongated hollow support sleeve for sliding said rod;
• threaded blade holding member on the end of said elongated hollow support sleeve for holding said removably attached cutter blade to said elongated hollow support sleeve;
• said removably attached cutter blade having an annular ledge wrapped around the exterior thereof and said threaded blade holding member having an interior annular ledge therein whereby the interior ledge of the threaded blade holding member will abut against the annular ledge of the blade for holding the blade to the hollow support sleeve;
• said elongated hollow support sleeve having a raised annular portion therein having substantially the same interior cross-section diameter as said removably attached cutter blade and said elongated rod being slidably supported on said raised annular portion and said removably attached cutter blade;
• and
• a cap attached to the opposite end of said elongated hollow support sleeve from said threaded blade holding member and a spring located between said cap and said elongated rod in said elongated hollow support sleeve, whereby said fixed cutter blade can be inserted in a cut and pulled into said removably attached cutter blade to cut a predetermined section in tissue.