1978: The first cochlear implant surgery is conducted by Graeme Clarke in Australia. He applied advanced integrated circuit technology in the process.
1980's: The Pulse Oximeter is developed in Japan. The Japanese inventor did not file a patent, so many companies produced their own Pulse Oximeters and sold it at less than $40. Aoyagi is credited for improving the Pulse Oximeter.
1980's: The defibrillator is developed, which is later made more affordable by the works of Dr. Fred Chapman.
1986: Electrical Impedance Tomography is started by Jonathan C Newell and David Isaacson, as well as a group in Sheffield, UK.
1930's: Albert S. Hyman invents the artificial pacemaker, which was to be used to resuscitate patients whose heart has stopped. It was never accepted by the medical community however.
1950's: The first artificial hip replacement is developed by english surgeon, John Charnley. Charnley's methods in making the first artificial hip replacement became later applied to knee and shoulder replacements.
1951: Professor of experimental surgery, Charles Hufnagel, developed an artificial heart valve and performed the first artificial valve implantation surgery the following year
1972: The CAT or CT scan (Computerized axial tomography), is introduced as the most important development in medical filming since the X ray some 75 years earlier
1981: MRI (magnetic resonance imaging) scanner is introduced into the medical clinic