Background Microfocused ultrasound with visualization has become one of the more popular nonsurgical facial rejuvenation therapies available. Although the treatment has gained wide acceptance, providing adequate pain relief during the procedure can be challenging. Objectives The aim of this study was to test our hypothesis that nerve blocks prior to treatment would be well tolerated and significantly reduce patient discomfort. Methods Subjects undergoing microfocused ultrasound were offered the choice of participating in a split face nerve block, bilateral block, or a control group. Nerves targeted included infraorbital, supratrochlear, supraorbital, zygomaticofrontal, mental, great auricular, and cervical plexus. Pain assessment was based on a 10-point Wong-Backer FACES Pain score. Results A total of 65 patients were included in the study: 28 in the split face group, 19 in the bilateral block group, and 18 without a block. The mean [standard deviation] pain score of the bilateral block cohort was 3.9 [1.2], and that of the control group was 5.1 [1.7] (P = 0.001). Patients in the split face cohort reported a higher pain score on the unblocked side of the face (7.5 [1.3]) than on the blocked side (2.9 [1.0]) (P < 0.001). The mean pain score for local anesthetic injection was 2.7 and 1.4 for the split face and the bilateral groups, respectively. There were no adverse events. Conclusions Nerve blocks are well tolerated and significantly improve patient comfort during microfocused ultrasound treatment without compromising outcomes or increasing adverse events. Level of Evidence: 2
Background Perioral rhytids are a bothersome sign of aging for many patients. While multiple treatments exist, choosing an optimal modality may be difficult taking into consideration that rhytids in this region are fine and the anatomy dynamic. Objective To compare the efficacy and safety, and patient satisfaction of a small-particle hyaluronic acid filler with 0.3% lidocaine (SP-HAL, Restylane Silk®) and cohesive polydensified matrix hyaluronic acid filler (CPM-HA, Belotero Balance®) in reducing uperficial perioral rhytids. Methods The study was double-blinded, and 48 subjects with moderate to severe superficial perioral rhytids were enrolled. Subjects were randomized to receive either CPM-HA in the left perioral region and SPHAL in the right, or vice versa. Rhytid severity was measured by patients using a linear analog scale, and for investigators a validated 5-point scale, for 180 days following treatment. Results Both SP-HAL and CPM-HA achieved a reduction in rhytid severity, and neither treatment group returned to baseline after 180 days. Investigator-reported scores for rhytid severity were significantly better for SP-HAL compared to CPM-HA and remained so at 180 days (p < 0.05). SP-HAL also proved significantly better for reducing rhytids according to patient scores, although this difference occurred between 120 and 180 days only. Adverse events included rash and mild acne for CPM-HA, while SP-HAL was associated with one post-inflammatory nodule and two occurrences of Tyndall effect. Conclusion While both SP-HAL and CPM-HA are effective at reducing perioral rhytid severity and have similar safety profiles, SP-HAL possesses a longer duration of effect.
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