Medicine: Capsules, Nov. 13, 1972

>Because doctors have no totally accurate way of judging the strength of bone while it knits, they often immobilize broken limbs longer than necessary. Overtime in traction could soon be eliminated, however. John Jurist, a biophysicist, and Dr. Edmund Markey, an orthopedic surgeon at the University of Wisconsin Medical School, are experimenting with a technique that could enable physicians to determine with precision whether a bone is strong enough to bear weight. So far, their research has focused exclusively on a long leg bone, the tibia, to which a vibrating machine is attached. After the bone is vibrated at various frequencies,...

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