Predicting Successful Surgeries

Reported December 2005

STANFORD, Calif. (Ivanhoe Broadcast News) -- People are as different on the inside as they are on the outside, making it difficult to predict which heart surgery will help which patient. Now, a new, high-tech approach may predict which patients will and will not have successful surgeries.

Heart attack survivor, David Lesesky says, "When I started having problems, I just didn't want to take the chance." He didn't take a chance. Lesesky made it through the heart attack and survived surgery and is doing just fine. The outcome, however, is not always the same: Each patient and each surgery brings its own risks.

"There's no way to guess as to how much blood flow is going to be restored," says Charles Taylor, Ph.D., a bioengineer at Stanford University in Calif. But now Taylor may have found a high-tech way of taking the guess work out of cardiovascular surgery. "We build a computer model to predict what will happen to a patient in a given surgical procedure."

The computer model is a personalized layout of each heart patient. Taylor says, "We actually do the surgery on the computer model before it is ever done on a patient." The program shows a 3-D model of a patient with cardiovascular disease and incorporates imaging data and mathematical equations.

"The question we have for this patient is that would she benefit from a procedure -- bypass procedure -- to improve blood flow down to the legs?" Taylor says after examining a patient's 3-D model on the computer. The yellow on the model shows the potential bypass path. When blood flow is simulated, it's revealed that two of the vessels going into the legs were clotted off -- the surgery would not have been successful.

"What it will mean for the patient is fewer operations -- conceivably more successful operations," Taylor says. And it will help keep hearts beating -- longer.

The computer model is being tested right now, retrospectively, on patients who are already planning to have surgery. So far results show it will be successful in predicting the outcome of cardiovascular surgeries.

Click here to Go Inside This Science or contact:

For more info on Dr. Taylor's program
http://www.med.stanford.edu/school/vascular/

For more information on engineering:
Institute of Electrical and Electronics Engineers, Inc.
1828 L Street, N.W., Suite 1202
Washington, D.C. 20036-5104
(202) 785-0017
ieeeusa@ieee.org
http://www.ieee.org

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