Cannula
Cannula
Cannula (/kæˈnjuːlə/; from Latin canna, 'reed') is a tube that can be inserted into the body, often for the delivery or removal of fluid or for the gathering of data. 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. It is also called an intravenous (IV) cannula. Its size mainly ranges from 14 to 24 gauge. Different-sized cannula have different colours as coded.
Etymology
The word "Cannula" is derived from the Latin word canna meaning 'reed'. This is in reference to the original cannulas that were made from reeds.
Types of Cannula
There are several types of cannula including:
- Venous cannula: Used for the insertion of intravenous fluids, for blood sampling and for administering medicines.
- Arterial cannula: Used in major operations and in critical care areas to measure beat-to-beat blood pressure and to draw repeated blood samples.
- Nasal cannula: Used to deliver supplemental oxygen or increased airflow to a patient or person in need of respiratory help.
Related Terms
- Trocar: A medical or veterinary device that is made up of an obturator, a cannula, and a seal.
- Gauge: A scale of measurement used to measure the size of the cannula, the larger the gauge, the smaller the diameter.
- Intravenous therapy: A therapy that delivers liquid substances directly into a vein.
See Also
External links
- Medical encyclopedia article on Cannula
- Wikipedia's article - Cannula
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski