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Cannula
Tube surgically implanted in the body / From Wikipedia, the free encyclopedia
For other uses, see Cannula (disambiguation).
A cannula (/ˈkænjʊlə/ ⓘ; Latin meaning 'little reed'; pl.: cannulae or cannulas)[1] is a tube that can be inserted into the body, often for the delivery or removal of fluid or for the gathering of samples. In simple terms, a cannula can surround the inner or outer surfaces of a trocar needle thus extending the effective needle length by at least half the length of the original needle. Its size mainly ranges from 14 to 26[2] gauge. Different-sized cannula have different colours as coded.
![]() | This article reads like a press release or a news article and may be largely based on routine coverage. (June 2021) |
![Diagram showing a cannula](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Diagram_showing_a_cannula_CRUK_058-multilingual1.svg/320px-Diagram_showing_a_cannula_CRUK_058-multilingual1.svg.png)
Decannulation is the permanent removal of a cannula (extubation),[3] especially of a tracheostomy[4] cannula, once a physician determines it is no longer needed for breathing.