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Long-distance surgery | page 1, 2
An anesthesiologist friend tells me that he judges the skill of cardiac surgeons on how gently and adroitly they "handle the tissues." This combination of a calm temperament, good judgment
and fine motor control isn't necessarily (read seldom) found in equal amounts in most surgeons. Enter the dexterous, infinitely patient robot. Robotic assistants are already being used for laparoscopic surgery. A robotic arm, controlled by a foot pedal or hand control, allows the surgeon to move the laparoscope while simultaneously
handling surgical instruments. One surgeon was quoted as saying, "It's great. It's an assistant who's always there, who doesn't have a tremor and doesn't misunderstand your commands." The
system is believed to shave 20 percent off surgery time and eliminate assistant fees. In 1998, a robot successfully performed a coronary bypass. Three surgical arms were inserted into the chest cavity through small incisions less than a centimeter wide. One of the arms held a
miniature camera; the other two held standard surgical instruments. The surgeon watched a monitor with a magnified image of the heart and manipulated the robotic arms with two handles. The robot's "motion-scaling" software translated large natural movements into precise micro-movements in the surgical instruments. A few months ago, the world's first closed-chest, robot-assisted beating-heart bypass surgery was performed at the London Health Sciences Centre. In conventional heart surgery, the chest
cavity is opened through a 12- to 15-inch incision, the heart is stopped and patients are placed on cardiopulmonary bypass. But with robotic surgery, there was no "chest-cracking." The three
incisions were pencil-sized, and the robot was able to perform the bypass on a beating heart -- no heart-lung machine was required. The patient went home four days after his surgery without the
usual protracted post-open chest surgery recovery period. The human element? The surgeon was able to directly communicate with the robot through a voice-recognition speech software system. What about the most delicate surgery of all -- neurosurgery? Would you want a robot fiddling inside your brain? Consider how a neurosurgeon performs his delicate procedures. He uses the
latest MRI techniques, including stereotactic guides to maximize the precision of his operating field. He develops a sense of the difference in tissue density to determine diseased versus normal tissue. (Tumors have a different "feel" than normal brain tissue.) He uses a magnifying loop or a microscope to visualize better detail. All of these functions can be reduced to algorithms and fed into computers. The robotic surgeon can "learn" the characteristics of different kinds of tissues by using neural net software, which is the same kind of technology that helps focus camcorders. The "smart" computer program continues to "learn" as it gains more experience. The probes used on the robot are much smaller than standard probes and should further reduce brain damage. With
the robotic neural net procedure, the speed and maximum pressure are controlled by the computer program. If the probe encounters an artery, it can be programmed to stop before it
penetrates. (This is according to the robot's developer, Robert W. Mah, Ph.D., of the NeuroEngineering Group at NASA's Ames Research Center, Mountain View, Calif.) Dr. Richard Satava, Yale Medical School professor of surgery, has suggested that future patient examinations might be done remotely via holograms. "Data gloves" and a variety of sensors will be able to build a three-dimensional picture of organs or any
physical aspect of a patient. Perhaps that scenario is a bit extreme, but then so was cloning five years ago. As we have developed a global economy, medicine becomes globalized. All aspects of medical practice will be affected -- even who and what we consider to be doctors.
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