title: Multiple pass ultrasound tightening of skin laxity of the lower face and neck.
abstract: 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.
  
  
  OBJECTIVE
  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.
authors.affiliation: Gowoonsesang Dermatologic Clinic, Seoul, Korea.
authors.forename: Hyoun Seung
authors.initials: HS
authors.lastname: Lee
authors.forename: Woo Sun
authors.initials: WS
authors.lastname: Jang
authors.forename: Young-Joo
authors.initials: YJ
authors.lastname: Cha
authors.forename: Young-Hwan
authors.initials: YH
authors.lastname: Choi
authors.forename: Yoonsik
authors.initials: Y
authors.lastname: Tak
authors.forename: Eenjun
authors.initials: E
authors.lastname: Hwang
authors.forename: Beom Joon
authors.initials: BJ
authors.lastname: Kim
authors.forename: Myeung Nam
authors.initials: MN
authors.lastname: Kim
mesh_terms: D000368:Aged; D003357:Cosmetic Techniques / Q000295:instrumentation*; D005145:Face; D005260:Female; D006801:Humans; D008875:Middle Aged; D009333:Neck; D012060:Rejuvenation; D015595:Skin Aging; D014464:Ultrasonic Therapy