- A tube that can be inserted into a cavity, usually by means of a trocar filling its lumen; after insertion of the c., the trocar is withdrawn and the c. remains as a channel for the transport of fluid. [L. dim. of canna, reed]- Hasson c. a laparoscopic instrument for open (rather than blind needle insufflation) placement of the initial port. The Hasson has a blunt-tipped obturator instead of a sharp trocar and a balloon on the distal portion of the sheath to hold it in place. SYN: laparoscopic c..- laparoscopic c. SYN: Hasson c..- perfusion c. 1. a double-barreled c. used for irrigation of a cavity, the wash fluid passing into the cavity through one tube and out through the other. 2. c. used to perfuse an organ, i.e., used to flush a donor organ in preparation for transplantation.- washout c. a c. that can be irrigated without removal from the artery.
* * *can·nu·la also can·u·la 'kan-yə-lə n, pl -las or -lae -.lē, -.lī a small tube for insertion into a body cavity, duct, or vessel
* * *n.a hollow tube designed for insertion into a body cavity, such as the bladder, or a blood vessel. The tube contains a sharp pointed solid core (trocar), which facilitates its insertion and is withdrawn when the cannula is in place.
* * *can·nu·la (kanґu-lə) [L. dim. of canna â€œreedâ€] a tube for insertion into a vessel, duct, or cavity; during insertion its lumen is usually occupied by a trocar. Cf. catheter.
Medical dictionary. 2011.