bioinstrument

[bī′ō-ĭnstrə-mənt]
n.
  1. A sensor or device attached to or embedded in body tissue to record and transmit physiological data to a receiving and monitoring station.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.