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cannula

cannula
套管【名词】插管

Definitions

a tube for insertion into a vessel, duct, or cavity. During insertion its lumen is usually occupied by a trocar; following placement, the trocar is removed and the cannula remains patent as a channel for the flow of fluids. nasal cannula one that fits into the nostrils for delivery of oxygen therapy. Called also nasal prongs.
A tube that can be inserted into a cavity, usually by means of a trocar filling its lumen; after insertion of the cannula, the trocar is withdrawn and the cannula remains as a channel for the transport of fluid or passage of instruments.
A tube that can be inserted into a cavity, usually by means of a trocar filling its lumen; after insertion of the cannula, the trocar is withdrawn and the cannula remains as a channel for the transport of fluid or passage of instruments. [L. dim. of canna, reed]
n. pl. cannu·las or cannu·lae (-lē′) A flexible tube, usually containing a trocar at one end, that is inserted into a bodily cavity, duct, or vessel to drain fluid or administer a substance such as a medication.





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