Editing Cannula (section)

==Body piercing==
Cannulas are used in [[body piercing]] when using a standard IV needle (usually between 18GA and 12GA, although may be as large as 0GA, in which case the procedure is known as [[dermal punching]] and uses a [[biopsy punch]] without a cannula), and for inserting hooks for [[Suspension (body modification)|suspensions]].

During piercing, the [[fistula]] is created by inserting the needle. The needle is then removed, leaving the cannula in place, which is sometimes trimmed down. The cannula is then removed and sterile jewelry is inserted into the fistula simultaneously, in order to minimise trauma to the fresh fistula caused by insertion of blunt-ended jewelry.