DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Treating a nosebleed. Hands cauterizing the nose of an elderly man in order to stop a nosebleed. For severe nosebleeds cautery (the application of heat or an irritant chemical to seal the ends of the blood vessels) may be the only way to stop the blood flow. Here the doctor is applying silver nitrate to the ends of the small blood vessels in the patient's nose.
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