Medicine: Warning Sweat

An anxious mother carried her two-year-old daughter into Boston's Children's Medical Center on a blistering afternoon last week. Dehydrated and suffering from severe shock, the child was near death. Only five years ago, considering the season, most physicians might have made a spot diagnosis of heat prostration. But the center's Dr. Harry Shwachman, developing an idea conceived by Manhattan's Dr. Paul di Sant'-Agnese, had a new and simple test to apply in such cases. An aide took the little girl's foot (with an older child he would have used the hand) and pressed...

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