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Aesthetics Practice Today

Blunt Cannula Technique

Published August 7, 2012 9:04 AM by Mina Grasso

Injection of soft tissue fillers such as Restylane, Juvederm and Radiesse are becoming more popular in aesthetic practices. Unlike a sharp beveled needle, a blunt cannula has a rounded tip and the opening is just proximal to that blunt tip. The cannulas are flexible or rigid and are available in different lengths. A variety of techniques can be used due to the vast options of needles.

Most injectors claim that the biggest benefit is less bruising to the patient. As an injector, the fear of causing necrosis of tissue due to an intravascular injection is always there. The blunt cannula glides through tissue along and beside vessels with less risk puncturing through them as a sharp needle would. There is less trauma and bruising of the tissue. Compared to traditional needle injections, blunt cannulas provide less social downtime.

Blunt cannula injections are being performed around the eyes and more vascular areas in a safer fashion. Diluting the filler and using a fanning technique allows for treatment of the temples and forehead with pleasing aesthetic results and less risk of lumpiness.

Many claim that the use of blunt cannulas makes a more comfortable treatment for the patient. However, depending on the area being treated, size of the cannula and the patient's pain tolerance, it may cause some discomfort. I still like to provide topical, local and small dose nerve block anesthetics if needed.

The use of these blunt cannulas in Europe is very popular, with growing popularity in the US. It is exciting to see different injector techniques. With the length of some of these cannulas, an injector may make just one insertion site on each side of the face to do their full correction resulting in less evidence and less social downtime.


The doctors learning curve for the injection cannulas is very short. The patient benefits from less trauma resulting in less fluid retention and a more accurate correction.

Janice Cowan, Asethetics - Medical Sales August 14, 2012 2:12 PM
Newport Beach CA

The blunt cannula is the wave of the future for injectable fillers.  I have completely transitioned to using these cannulas for injection of fillers to all treatment areas.  Not only is it safer than traditional techniques, it requires far less "punctures", causes virtually no bruising, and is usually painless.  To see a video of the techniques visit

Kian Karimi MD

Kian Karimi MD, Facial Plastic Surgery - Physician, Pacific Specialists August 9, 2012 1:03 PM
Los Angeles CA

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About this Blog

    Occupation: Physician Assistant/Nurse Practitioner
    Setting: Miami & Upland, Calif.
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