The cannulas are highly advantageous in that they are safer, more accurate, cause virtually no bruising when performed correctly, and do not require any kind of injected anesthesia or blocks in most cases. The pain, bruising, swelling, and length of the procedure have been significantly reduced with these cannulas.

A blunt cannula allows blood vessels to be ‘pushed aside’ as the microcannula moves around the tissue under the skin instead of piercing the blood vessels as with traditional needles.

A blunt-tip cannula is a small tube with an unsharp rounded end, specifically designed for atraumatic intradermal injections of fluids, for example injectable fillers. It has ports on the side allowing the product to be dispensed more evenly. Over the years a wide array of blunt-tip micro-cannula have been designed that offer variety in flexibility, size and diameter, but all are very small in diameter. The modern micro-cannulae allow both superficial and more involved procedures. Different sizes can also be used to inject fillers of nearly any type of level of viscosity. Extremely flexible, long micro-cannula can be used to employ the "fanning technique", a method that allows for treatment of a large area through a single puncture point.