Nasal cannula is designed to ensure equal volume of oxygen to both air passages.
Increased patient compliance with nasal cannula as patients will be able to speak, eat or drink.
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.