<p>OXIMETER An apparatus connectable to an instrument comprising an optical fiber for conducting light along it length and a connector body for use in coupling the optical fiber to the instrument. The connector body defines an enclosure having an entrance passage leading into the enclosure and an exit passage leading from the enclosure. The optical fiber extends through the entrance passage into the interior of the enclosure and into the exit passage. The optical fiber has an enlarged end portion which cooperates with the exit passage to retain the end portion in the exit passage.</p>
