An anabolic protoplaser was a medical device used by Federation doctors in the 23rd century, and was designed to repair torn veins and arteries by uniting the nerves and muscle fibers. (TOS novels: Spock, Messiah!, Planet of Judgment, The Klingon Gambit) In 2269, Dr. Leonard McCoy used an anabolic protoplaser to heal the fatally wounded Kyrosian boy, Alt, while on the surface of Kyros. (TOS novel: Spock, Messiah!) In 2293, McCoy used an anabolic protoplaser in an attempt to save Gorkon's life. (TOS novel: The Fearful Summons)