ULTRASOUNDS COULD STOP INTERNAL BLEEDING

I came across an article from 2001 about using ultrasounds to stop internal bleeding. The passage discusses how doctors have known that hot irons or intense electric current (electrocautery) can stop massive bleeding by causing the vessels to shrink, then clot, and finally shutoff to stop outflow from a damaged blood vessel. A group at the University of Washington at Seattle is interested in making a device that detects and acts on blood vessels with the help of ultrasound waves. This would be superior because most methods can’t penetrate tissue by more than a few millimeters. Ultrasound waves travel through tissue quite easily and can focus with remarkable accuracy. There is more information on the site:

http://physicsweb.org/articles/world/14/8/10