title: Efficacy of the Q-switched Neodymium: Yttrium Aluminum Garnet Laser in the Treatment of Blue-black Amateur and Professional Tattoos.
abstract: BACKGROUND
  Q-switched neodymium: yttrium aluminum garnet (Nd: YAG) laser at a wavelength of 1064 nm primarily targets dermal melanin and black tattoo ink. Recent studies have shown that this laser is effective in treating black tattoos. There are few studies conducted in India for the same.
  
  
  OBJECTIVE
  The aim was to assess the effectiveness of Q-switched Nd: YAG laser (QSNYL) in the treatment of blue-black tattoos following 3 treatment sessions.
  
  
  METHODS
  This study, a prospective interventional study included a total of 12 blue-black tattoos. Following informed consent for the procedure, as well as for photographs, a questionnaire was administered, and improvement perceived by the patient was recorded. In addition, global assessment score (GAS) by a blinded physician was also recorded. Photographs were taken at baseline and at every follow-up. Each patient underwent three treatment sessions with 1064 nm QSNYL at 4-6 weekly intervals. Fluences ranged from 1.8 to 9 J/cm(2). The follow-up was done monthly for 4 months from the first treatment session. The response was assessed by patient assessment (PA) and GAS by comparing photographs.
  
  
  RESULTS
  After three treatment sessions, although no patient achieved clearance, most patients showed good response with few adverse effects. An average of 64.1% (GAS) and 54.2% (PA) improvement was observed in 12 tattoos. Tattoos more than 10-year-old showed quicker clearing than those less than 10-year-old. Amateur tattoos also showed a better response in comparison to professional tattoos.
  
  
  CONCLUSIONS
  Totally, 1064 nm QSNYL is safe and effective for lightening blue-black tattoos in pigmented Indian skin. All patients achieved near complete clearance following the continuation of treatment (an average of six sessions) although this was spaced at longer intervals.
authors.affiliation: Department of Dermatology, PSG Hospitals and PSGIMSR, Coimbatore, Tamil Nadu, India.
authors.forename: Chembolli
authors.initials: C
authors.lastname: Lakshmi
authors.affiliation: Department of Dermatology, PSG Hospitals and PSGIMSR, Coimbatore, Tamil Nadu, India.
authors.forename: Gayathri
authors.initials: G
authors.lastname: Krishnaswamy
keywords: Blue-black tattoos; Q-switched neodymium:yttrium aluminum garnet laser; pigmented skin