How to use cannulas in clinic — a practical guide

Why a cannula instead of a needle?

A blunt-tip cannula displaces tissue rather than cutting through it. In daily practice that means lower vessel trauma risk and greater patient comfort when placing dermal fillers.

Choosing the right size

Match cannula gauge to:

• target depth — superficial layers often need finer cannulas,
• product viscosity — thicker gels flow better through a larger internal bore,
• anatomical zone — precision and control matter most near sensitive vascular areas.

Technique

1. Prepare the field according to your sterile workflow.
2. Create a pilot entry with an appropriately sized needle.
3. Introduce the cannula with smooth, parallel-to-skin advancement.
4. Inject slowly while monitoring tissue response and product flow.

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