Needle vs Cannula
In a competitive marketplace, patients are demanding more comfortable, less traumatic treatments and reduced social downtime, which can last up to 2 weeks if bruising occurs. A cannula technique makes the treatment quicker and less painful, without needle re-entry. There is less swelling and bruising due to the reduction in tissue subcision.
A clinical study compared the swelling, pain and bruising experienced with a sharp tipped needle and a blunt tipped micro-cannula for the injection of dermal filler. The study concluded that blunt tipped cannulas showed more rapid patient recovery than sharp tipped needles. Pain scales scored at the point of injection were slightly less with the cannula, and swelling was significantly reduced compared to the use of a sharp needle.