Medicine is constantly evolving, constantly looking for new and better solutions that can replace previously used methods or products. This is what happened with the good needle, which is gradually being bitten by the cannula. Each of us knows what a needle looks like and what it is used for, but there are definitely fewer people who know the same about cannulas. Do you know what both products are for and what are the differences between them?
THE NEEDLES ARE FEW DIFFERENT FROM CANNULA - MYTH
Although the cannulae looks like a traditional needle, there are significant structural differences. A needle is a tube with hollow inside, cut and sharp at the end, so it can stick into the skin, puncture or cut tissue. The cannula is also a well-shaped tube, hollow, but has no cut end and no sharp edge, and the hole through which the preparations are administered is on the side, and the cannula has a centimeter scale along its entire length, which allows you to accurately control the puncture depth. Cannulas, or "blunt needles", are soft, blunt ended, with a slippery surface, so they do not disturb - unlike a needle - blood vessels during the procedure.
CANNULARS USED IN AESTHETIC MEDICINE ARE THE SAME AS THE INTRAVENOUS CANNULES - MYTH
The cannulas used for aesthetic medicine treatments differ in structure from intravenous cannulas. An intravenous (peripheral) cannula, commonly known as a cannula, is a relatively short plastic tube that is temporarily inserted into a vein with a steel needle. Its external part allows for the attachment of a syringe or drip through which drugs or fluids are administered. The cannula used for aesthetic medicine treatments is very flexible, and the opening for administration of preparations is located on the side, which allows easy and quick administration of preparations to the tissues under the skin. The blunt end of the cannula allows for safe injection and extraction of fluids, even in very sensitive areas.
THE NEEDLE GOE OUT OF DATE - MYTH
Some say that an old and worn needle may become a thing of the past for a well-deserved retirement. They believe that the cannula - its younger and improved "friend" - due to its properties is better suited for treatments and therefore leads the way in aesthetic medicine offices. However, as it turns out, there is room for both products on the market. Some aesthetic medicine procedures can (and sometimes even should) be performed with a needle, e.g. lip modeling, nasolabial furrow filling or marionette lines. The needle enables more precise administration of the preparation and causes less destruction of the tissues under the skin.
THANKS TO A ONE-TIME STROKE CANNULA, YOU CAN PERFORM A TREATMENT ON A LARGER AREA OF THE SKIN - FACT
The length and plasticity of the cannula allow only one puncture to be performed in order to perform the treatment on a larger area of the skin. It is also possible to change the direction and depth of the preparation without the need to remove and re-insert the cannula. Even from 8 to 12 cm2 of the skin surface can be treated with one injection (the size of the treatment area depends on the length of the cannula). In the case of procedures performed with the use of a needle, such a large area must be punctured several times.
THE NEEDLE IS MORE PRECISE THAN A CANNULA - FACT
Performing the procedure with a needle provides greater precision and a more natural effect, but increases the risk of bruising. The cannula, on the other hand, pushes between the blood vessels without damaging them, but it does not allow the procedure to be performed with perfect attention to every detail. The cannula goes where there is less resistance, and the needle, hitting harder tissue, cuts through it, instead of looking for a way past it.
CANNULA IS BETTER FOR TREATMENTS IN YOUNG PEOPLE - MYTH
In young people (aged 20+ or 30+) who decide to make delicate corrections, some treatments cannot be performed well with a cannula, especially microcorrection, correction of proportions or treatments aimed at beautifying the face. With these types of procedures, small amounts of preparations are administered and therefore it is so important to give them precisely. For this reason, in the case of young patients, a needle is more often used for aesthetic medicine procedures instead of a cannula.
METHOD OF PERFORMING THE TREATMENT - NEEDLE OR CANNULA - DEPENDS ON THE DOCTOR - FACT
The choice - needle or cannula - depends primarily on the preferences and experience of the doctor. As a rule, however, such procedures as filling and contouring the lips, improving the shape of the nose or filling the nasolabial furrows are performed using a needle. In turn, cannulas are used for treatments performed on a large area of the skin, e.g. volumetry, skin revitalization and treatments around the valley of tears and temples with the use of hyaluronic acid. Cannulas more and more often replace needles also in face lifting treatments (it is the so-called soft lifting).