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cannula
A tube that can be inserted into a cavity or lumen, i.e. cannulation of a vein for intravenous access.
In some instances a trocar may be inserted into the lumen of the cannula in order to:
1) provide a sharp tip for penetrating the cavity
a) thoracentesis
b) paracentesis
2) ensure that tissue is not drawn into the cannula prior to removal of the trochar
- lumbar puncture for CSF analysis
Specific
arteriovenous cannula
nasal cannula
General
device (medical device)
References
Stedman's Medical Dictionary 27th ed, Williams &
Wilkins, Baltimore, 1999