Methods and apparatus for enabling substantially bloodless surgery and for stemming hemorrhaging. High intensity focused ultrasound ("HIFU") is used to form cauterized tissue regions prior to surgical incision, for example, forming a cauterized tissue shell around a tumor to be removed. The procedure...http://www.google.de/patents/US6432067?utm_source=gb-gplus-sharePatent US6432067 - Method and apparatus for medical procedures using high-intensity focused ultrasound
