RESUMEN
BACKGROUND: Skin laxity is a common complaint of patients who request skin rejuvenation. Radiofrequency and infrared light are widely used for nonablative treatment of skin laxity. Intense focused ultrasound (IFUS) has been investigated as a tool for the treatment of solid benign and malignant tumors for many decades but is only now beginning to emerge as a potential noninvasive alternative to conventional nonablative therapy. OBJECTIVES: To evaluate the efficacy of IFUS for the treatment of face and neck laxity. METHODS: Twelve female volunteers were enrolled in the study, and 10 were ultimately evaluated. The device under investigation was an IFUS. Areas treated included the face and neck. For treatment, the 4-MHz, 4.5-mm probe was used first, followed by the 7-MHz, 3.0-mm probe. Two blinded, experienced clinicians evaluated paired pretreatment and post-treatment (day 90) photographs. Patient self-assessments were also obtained. RESULTS: On the first primary outcome measure, two blinded clinicians felt that 8 of 10 subjects (80%) showed clinical improvement 90 days after treatment. Nine of 10 subjects (90%) reported subjective improvement. CONCLUSIONS: IFUS has many advantages for skin tightening.
