title: Endovenous laser ablation of the great saphenous vein comparing 1920-nm and 1470-nm diode laser.
abstract: BACKGROUND
  The aim of this study was to compare venous occlusion rates at a one-year follow-up comparing 1920-nm versus 1470-nm endolaser.
  
  
  METHODS
  Randomized prospective study with consecutive patients with varicose veins associated to great saphenous reflux. The 1470-nm laser ablation was performed in continuous mode, with power of 10 W, while for the 1920-nm it was set in 5 W. Follow-up data were collected at the 7-day, 30-day, 3-month, 6-month and 1-year visits, and involved clinical, ultrasound evaluation and measurement of occlusion length.
  
  
  RESULTS
  Sixty seven patients were included, with 42 limbs operated in the 1470-nm group and 48 limbs in the 1920-nm group. There were no differences in relation to age, CEAP (Clinical, Etiologic, Anatomical and Pathological Classification), VCSS (Venous Clinical Severity Score) and saphenous diameter. The resulting LEED in 1920-nm group was 17.8±0.6 J/cm and vs. 24.7±0.8 J/cm in 1470-nm group (P<0.01). Closure rates were lower for the 1920-nm group: 90.9% vs. 96.8% (P=0.06) at 30 days, 87.5% vs. 96.3% at 6 months (P=0.03), and 87.5% vs. 94.7% (P=0.05) at one year. The 1920-nm group had less ecchymosis (18.7% vs. 52.4%), induration (12.4% vs. 38.1%) and days of analgesic use (1.4±0.2 vs. 2.4±0.4). CEAP and VCSS were reduced over time in both groups.
  
  
  CONCLUSIONS
  Treatment with endolaser 1920-nm was feasible and with reduced complications. The use of low endoluminal energy resulted in lower vein occlusion rates comparing to the 1470-nn laser. Clinical outcome scores were similar between groups.
authors.affiliation: Department of Vascular Surgery, Children ABC Hospital, Mater Dei Hospital and Vascular BH Institute, Belo Horizonte, Brazil - daniel@vascularbh.com.br.
authors.forename: Daniel
authors.initials: D
authors.lastname: Mendes-Pinto
authors.forename: Paulo
authors.initials: P
authors.lastname: Bastianetto
authors.forename: Lívia
authors.initials: L
authors.lastname: Cavalcanti Braga Lyra
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Kikuchi
authors.forename: Lowell
authors.initials: L
authors.lastname: Kabnick
mesh_terms: D000328:Adult; D000368:Aged; D001938:Brazil; D005260:Female; D006801:Humans; D053685:Laser Therapy / Q000009:adverse effects / Q000295:instrumentation*; D054023:Lasers, Semiconductor; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D012501:Saphenous Vein / Q000503:physiopathology / Q000601:surgery*; D012720:Severity of Illness Index; D013997:Time Factors; D016896:Treatment Outcome; D014648:Varicose Veins / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D055815:Young Adult