Fiber-optic stylet for needle tip localization

摘要

A fiber-optic stylet is provided for use with a surgical or diagnostic type needle. The stylet comprises an elongated flexible or rigid casing which is adapted to be inserted into the body of a human or animal. It also includes at least one transmitting light fiber having a bevelled end which extends to a first end of the casing and that conforms to that of the needle. A second, receiving light fiber has a bevelled end and is also positioned within the casing, also having its bevelled end located at the first end of the needle. The second fiber-optic element is generally cylindrical and has a reflective surface thereon which is located adjacent to the bevelled end of the light fiber. The apparatus is used to precisely determine the area in which a needle is positioned within a body during a diagnostic or surgical procedure.