Simple Method Found To Warm Cold Hands

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from New York Times

A simple and inexpensive method of training the body to change the way it reacts to cold has proven highly successful in curing victims of a little-known disease that cuts circulation to the hands in cold weather, according to a researcher for the Army.

Using hot water and an ice chest, victims of ailment, Raynaud's disease, can train their body to prevent a routine reaction that leads to restricted circulation to hands and feet as the body saves energy to cope with cold, Dr. Murray Hamlet of the Army's Research Institute of Environmental Medicine said last week.

The curtailment of blood flow is harmless to most people because the circulation will resume after about 10 minutes, Dr. Hamlet said. But Raynaud's victims do not regain circulation to their fingers, causing a painful condition that increases the risk of frostbite and in severe cases can force amputation, he said.

Raynaud's is primarily caused by cold but also can be brought on by emotional stress and by frequent use of vibrating machinery, such as jackhammers and chain saws. For victims whose conditions are prompted by cold, the treatment has proven virtually foolproof in eliminating the problem, Dr. Hamlet said. Condition's Cause Unknown

When the body is exposed to cold, the nervous system constricts blood flow to hands and feet to retain heat. When the temperature of the extremities reaches dangerously low levels, the nervous system in effect throws a switch that dilates blood vessels and restores full circulation, Dr. Hamlet said.

But Raynaud's sufferers do not regain circulation because blood vessels leading to their hands do not dilate as they should. Researchers have been unable to determine what causes the condition, Dr. Hamlet said.

It is unclear how many people have Raynaud's, which occurs predominantly among women, affecting perhaps as many as 10 percent of them, Dr. Hamlet said. Many victims are not aware they have the disease because they think their body's response to the cold is normal, he said.

A procedure originally devised a decade ago by an Army doctor at an laboratory in Alaska to treat the disease has been refined by reasearchers at the Army laboratories here and now is being used more and more by civilian physicians, Dr. Hamlet said. Warm and Cold Water

Three to six times a day, every other day, Raynaud's sufferers undergo a treatment in which they first sit indoors with their hands submerged in warm water and then are put in a cold environment, exposed to the cold except for their hands, which are submerged in an ice chest filled with warm water.

After 50 rounds of treatment, all of the 150 test subjects at the laboratories here were able to venture into the cold without losing circulation to their hands, he said.

''We just retrain those blood vessels to dilate rather than restrict in response to cold,'' Dr. Hamlet said. ''It works extremely well.'' He said the treatment may not work, however, for victims of Raynaud's who developed the disease as a result of other illnesses, such as high blood pressure, arterial disease, drug abuse and trauma.

Dr. David Trentham, medical director of rheumatology at Boston's Beth Israel Hospital, said the success rate of the treatment had not been shown independently of the Army data but that it appeared to work well.

''It's a very innovative and interesting approach and there is an abundance of evidence to indicate why it should work,'' he said. ''It hasn't been confirmed but I think that is largely because it is so new.''