A jig for consistently orienting surgical instrument. The jig has a base for placement against a tissue in the vicinity of where a surgical procedure is to be performed, a yoke, an instrument support sleeve on the yoke and defining a passageway for the introduction of a surgical instrument to be inserted...http://www.google.com/patents/US5201742?utm_source=gb-gplus-sharePatent US5201742 - Support jig for a surgical instrument
