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Investing in CPR.

Investing in CPR

A new understanding of how cardiopulmonary resuscitation(CPR) works has led to the development of a vest that, when rhythmically inflated, replaces manual chest compression. The vest was developed at Johns Hopkins University in Baltimore as a more efficient way of moving blood through the body when the heart fails. Researchers have already used it on several brain-dead people to prove its efficacy, and trials in emergency situations are expected soon.

The vest evolved from a change in the understanding of CPR. Whenthe procedure was first introduced in 1960, it was thought to move blood through the body by direct compression of the heart between the sternum and backbone. But studies at Johns Hopkins and the University of California at Los Angeles (SN: 12/6/80, p.359) have shown that a general increase in pressure within the chest, rather than direct manipulation of the heart, is what squeezes blood to the rest of the body.

Henry R. Halperin, Myron Weisfeldt and several others atHopkins developed the vest in a series of studies on dogs whose heartbeats were experimentally iterrupted. In a recent trial they compared the vest with normal and extra-strong manual compression, and found that the vest pushed more blood and that more dogs survived.

The Hopkins researchers plan soon to try a human-sizedvest on people who fail to revive after conventional CPR, Halperin says.
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Title Annotation:vest developed for use in cardiopulmonary resuscitation
Author:Silberner, Joanne
Publication:Science News
Date:Jan 31, 1987
Words:230
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