The cannula technique refers to using a small, blunt-tipped tube or cannula to inject filler into the desired treatment areas. Here are the key points about this technique:

A 21 or 23 gauge cannula is commonly used, with the specific size depending on the treatment area like the face or hands^[3]. The cannula is inserted through a small entry point in the skin.

Before injecting, the area is typically numbed with a topical anesthetic cream or injectable lidocaine solution to minimize discomfort^[1].

The cannula allows for smooth, even distribution of the filler product into the subdermal layer just under the skin’s surface where volume is needed^[2].

Compared to needles, cannulas cause less trauma, bruising, and risk during the injection process due to their blunt tips^[5].

The injector uses a fanning or linear threading technique, moving the cannula back and forth to evenly disperse the filler while massaging the area^[3].

So in simple terms, the cannula technique involves using a small, blunt tube to inject and evenly distribute the filler product just under the skin’s surface after first numbing the area. This allows for a smoother, safer injection process compared to needles.

Sources:

1. https://www.myrenuva.com/before-after
2. https://www.plasticsurgerynola.com/non-surgical/injectables/renuva/
3. https://www.drjjwendel.com/plastic-surgery-news/renuva-turn-back-the-clock-on-times-first-touch/
4. https://www.youtube.com/watch?v=-xY7-y4rveY
5. https://www.youtube.com/watch?v=a_vw7Xp78Ic