A fluid operated retractor for use in surgery. The retractor has a portion that is expandable upon the introduction of fluid under pressure. The expandable portion is made of a material strong enough, and is inflated to enough pressure, to spread adjoining tissues within the body. The retractor is especially...http://www.google.com.au/patents/US20040097949?utm_source=gb-gplus-sharePatent US20040097949 - Fluid operated retractors
