Canula vs. needle: a comparison based on ultrasound findings
Objectives: It is essential for injectors to enhance their skills and incorporate the use of canula in aesthetic injections throughout the face. It is crucial to comprehend the back-flow mechanism through the layers of the treated areas, other untreated areas, and its impact on both immediate and long-term aesthetic results.
Introduction: We have been utilizing needles, or some of us prefer to refer to them as needle-like injectors. However, it is no longer just a personal preference. It is now the opportune moment to educate ourselves on the usage of cannulas. By doing so, we can enhance the precision of our procedures and elevate the quality of our aesthetic results. It is essential as we now know about Hyaluronic acid fillers longevity and the migration mechanisms.
Materials / method: Utilizing ultrasound as our primary tool for real-time scanning, I have been able to observe the retrograde movement of hyaluronic acid fillers as they flow back through the layers during needle injections. By comparing this phenomenon to the controlled and gradual backflow than happens with the use of a cannula, I have gathered valuable insights. Moreover, I have conducted ultrasound scans on patients who have undergone mid-face treatments using both needle and cannula techniques, allowing me to obtain evidence on the long-term aesthetic outcomes and more details about migration mechanisms.
Results: ultrasound scans of needle usage has revealed that our initial expectations regarding filler placement have not been fully realized. The fillers, it end up placed into different layers, the part placed into fascia tend to migrate through the fascia due to its inherent contractions. Consequently, they may end up far from the intended treatment areas. Moreover, the sharpness and penetration ability of the needle vary with each puncture, often failing to reach the desired layers for filler placement. In certain instances, the needle may even inadvertently hook onto vessels along its path.
Conclusion: It is important that we familiarize ourselves with the proper use of the canula during our medical procedures. The utilization of the canula not only ensures precision but also guarantees a safer experience. This is due to its minimal, slow and manageable backflow. It is vital to note that the effectiveness of the canula is contingent upon the proficiency of the user, which can be can be enhanced through practice and training. This will enable us to place fillers with utmost accuracy, ensuring long term aesthetic results.
