Avaliação da efetividade analgésica da Lidocaína em pacientes submetidos à indução percutânea de colágeno

Abstract

Percutaneous collagen induction therapy, microneedling, is a minimally invasive procedure that stimulates collagen production without causing total de-epithelialization of the skin. Depending on the size of the needle, the use of local anesthetics is essential to promote comfort and analgesia for patients. Thus, this study aimed to evaluate the protocols for the application of local anesthetics used by health professionals and beauticians during the microneedling technique and to investigate, in practice, their effectiveness in analgesic induction. The study was carried out in two stages. The first consisted of investigating the analgesic protocols applied by professionals through an observational, descriptive, cross-sectional and retrospective field research. Professionals were invited to answer a questionnaire about the analgesic protocols used. The second stage involved the practical application of microneedling, following the most effective protocols identified in the first stage. In this phase, a cross-sectional, prospective and comparative field study was conducted with volunteers eligible to undergo the procedure. A 1 mm dermaroller was used and, for analgesia, 4% lidocaine cream was applied for an exposure time of 45 minutes, associated with skin occlusion on one hemiface in a randomized manner. Pain intensity was assessed separately in anatomical regions of the face, using the Numerical Verbal Scale (NVS) and the Verbal Descriptor Scale (VDS). The first phase of the study involved the participation of 64 professionals, of whom 81.25% used local anesthetics for topical application. Among them, 49% used lidocaine as the active ingredient, 50% performed skin occlusion, 44% applied local anesthetic for between 30 minutes and 1 hour and 62.5% reported that pain limited therapeutic adherence. In the second phase, consisting of 15 volunteers, 100% reported feeling pain in some region of the face. Occlusion did not show a statistically significant difference, but the lower third of the face, with occlusion, which was exposed to the local anesthetic for a longer time, demonstrated a lower perception of pain, and 93.3% of the volunteers stated that they would undergo the procedure again. Based on the findings of this study, it was observed that the perception of pain during the microneedling technique may be conditioned by the time of anesthetic exposure associated with skin occlusion, as well as by the anatomical region of the face.