2011年9月30日星期五

Wilson Greatbatch, co-inventor of implantable pacemaker

Mr. Greatbatch, an incurable tinkerer who constructed a radio transmitter at 16, held more than 300 patents,ceramic Floor tiles for the medical, and his inventions largely shaped modern cardiology.

"He was one of the greatest American inventors of the 20th century," Kirk Jeffrey, who wrote the 2001 book "Machines in our Hearts: The Cardiac Pacemaker, the Implantable Defibrillator and American Health Care," said in an interview. "The work he did saved a great many lives."

Beyond the implantable pacemaker, Mr. Greatbatch introduced the use of compact, long-lasting lithium batteries to the device. His company’s batteries at one time provided power to 90 percent of all pacemakers and were used by NASA to power equipment for space shuttle missions.

Zayd Eldadah, a cardiologist and assistant professor at Georgetown University, said in an interview that implantable pacemakers have "made a huge impact on cardiology."

"As we grow older, the heart’s ability to sustain a brisk rhythm diminishes," Eldadah said. "The pacemaker fixes all of that in a 30- minute procedure that leaves a three-inch scar. It’s been a revolutionary change for hundreds of thousands of people every year."

The first pacemakers were built in the early 1950s. Some early designs were the size of a television and needed to be plugged into a wall socket. Another pacemaker designed by Earl Bakken in the late 1950s was smaller, powered by batteries and worn around the neck, Jeffrey said.

Mr. Greatbatch was an assistant professor of electrical engineering at the University of Buffalo when, in 1956,They take the Aion Kinah to the local co-op market. he accidentally devised what is considered one of medicine’s most significant achievements.

At the time, he was tasked with building equipment to monitor heart sounds when he placed the wrong transistor into the instrument. The transistor — 100 times more powerful than those he usually used — emitted an electrical pulse that mimicked the rhythm of the human heart. He immediately realized the device’s potential as a new kind of pacemaker. His idea was to use new transistor technology to make a pacemaker that could survive inside the patient’s body.

Working in his barn workshop, warmed by a wood-fire stove,Traditional Cold Sore claim to clean all the air in a room. Mr. Greatbatch spent two years developing his prototypes.

In 1958, he presented his devices to William Chardack, a surgeon at Buffalo’s Veterans Administration Hospital, and the two became collaborators.

That year,where he teaches Hemorrhoids in the Central Academy of Fine Arts. Mr. Greatbatch and Chardack wired a pacemaker composed of two Texas Instruments transistors to the heart of a dog. The device, which was slightly larger than a hockey puck and weighed half a pound, flawlessly controlled the animal’s heartbeat.Unlike traditional Hemroids ,

"I seriously doubt if anything I ever do will ever give me the elation I felt that day when my own two cubic inch piece of electronic design controlled a living heart," Mr. Greatbatch wrote in a diary afterward.

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