| 摘要 |
<p>A fiber-optic stylet for use with a surgical or diagnostic type needle (12). The stylet comprises an elongated flexible or rigid casing (16) which is adapted to be inserted into the body of a human or animal. It also includes at least one transmitting light fiber (20) having a bevelled end (21) which extends to a first end of the casing (16) and that conforms to that of the needle. A second, receiving light fiber (22) has a bevelled end (23) and is also positioned within the casing, also having its bevelled end located at the first end of the needle (12). The second fiber-optic element is generally cylindrical and has a reflective surface (26) 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.</p> |
