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In 1250 Roger Bacon constructed the first magnifying glass. This was the first convex lens designed for scientific purposes. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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The earliest known document mentioning concave lenses being used for correcting myopia was a letter from the Duke of Milan. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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René Laënnec invented the stethoscope, Trumpet-shaped wooden tube. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Dr. Crawford W. Long peformed the first operation using diethly ether as an anesthetic by putting a ether-soaked towel against the patient's face. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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British scientist, Richard Caton, noted electrical impulses from the brains of animals, laying down the principles that would lead to the development of the electroencephalogram.
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Wilhelm Conrad Röntgen discovered the X-ray, an invention so remarkable that many did not believe the reports of its use. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Dr. Willem Einthoven invented the first electrocardiogram. The original weight 600 pounds. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Dr. Hans Christian Jacobaues, a swedish internist, perfomed the first laparcoscopy on a human. He punctured the abdominal walls of 17 patients.
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Antonio Egas Moniz, a Portuguese nuerologist, perfomed the first modern lobotomy. The operation was found useless and destructive and is no longer practiced. In 1948 Moniz was awarded the Nobel Prize for his invention
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Dr. Albert S. Hyman invented heart pacemaker. The device was anput 10 inches long and weighed less than a pound. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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David S. Sheridan, a man with an eight-grade education working in a floor refinishing business, invented the disposable catheter, hollow plastic tube designed to be used once and discarded
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Dr. Harold Ridley implanted the first permanently placed intraocular lens to correct cataract. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Henry Opitek, 41, was operated on using an artificical heart, The dodrill GMR heart machine, manufactured by General Motors and generally considered the first mechanical heart.
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Dr. Edward used a Doppler monitor on a woman's abdomen to detect fetal heartbeat "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Dr. Christiaan Barnard peformed the first human heart transplant. The patient, a 53-year-old man, died 18 days later. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Dr. Raymond V. Damadian announced that he had patented a technique using nuclear magnetic resonance to distinguish between normal and cancerous tissue "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Dr. Colin McGucklin and Dr. Nico Forraz developed a liver grown from stem cells. The size of a small coin, it could not be implanted in a human. "Milestones in Medical Technology." <i>The New York Times</i>. The New York Times, 09 Oct. 2012. Web. 13 Nov. 2015.
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Benjamin Franklin invented the flexible catheter. It was made of hinged metal segments. He made it for his brother who was suffering from bladder stones.
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