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A tracheostomy tube may be single or dual lumen, and also cuffed or uncuffed. A dual lumen tracheostomy tube consists of an outer cannula or main shaft, an inner cannula, and an obturator. The obturator is used when inserting the tracheostomy tube to guide the placement of the outer cannula and is removed once the outer cannula is in place.
A tracheal button is a rigid plastic cannula about 25 millimetres (0.98 in) in length that can be placed into the tracheostomy after removal of a tracheostomy tube to maintain patency of the lumen. History
Disposable trocars Laparoscopic instruments for insertion through trocars A trocar (or trochar ) is a medical or veterinary device used in minimally invasive surgery . Trocars are typically made up of an awl (which may be metal or plastic with a pointed or tapered tip), a cannula (essentially a rigid hollow tube) and often a seal .
Shiley may refer to: Bjork–Shiley valve, mechanical heart valve prosthesis; Donald Shiley, one of the co-inventors of Pfizer's Bjork-Shiley heart valve;
Donald Pearce Shiley (January 19, 1920 – July 31, 2010) was the inventor of the Bjork–Shiley valve, a prosthetic heart valve. He was a 1951 alumnus of the University of Portland , where he studied engineering.
The insertion of a plastic cannula and withdrawal of the needle was introduced as a technique in 1945. [11] The first disposable version to be marketed was the Angiocath, first sold in 1964. In the 1970s and 1980s, the use of plastic cannulas became routine, and their insertion was more frequently delegated to nursing staff. [12]