Capsules

P: An electronic blood-pressure recorder developed by the National Bureau of Standards has been marketed by Colson Corp. of Elyria, Ohio. Attached to the patient's arm, it will record blood pressure at whatever intervals the doctors want, from 30 seconds to an hour. Attached to a buzzer, it can call the nurse when pressure gets critically low. Price: $1,500.

P: Using piano wire bought from a model-airplane shop, two U.C.L.A. surgeons have developed an operation for opening thigh arteries clogged by cholesterol in a common form of arteriosclerosis. A wire loop passed through a length of the artery strips out the inner wall with its fatty deposits.

P: One of the commonest causes of skin ailments is home medication of assorted cuts, scratches and infections without waiting for a proper medical diagnosis, reported Dr. L. Edward Gaul of Evansville, Ind. Thus misused, practically any medication can cause trouble--and this includes the sulfas, antibiotics, local anesthetics and antihistaminics.

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