title: No additional benefit from laser in balloon angioplasty of the superficial femoral artery.
abstract: OBJECTIVE
  To evaluate the efficacy of the addition of plaque ablation by hot-tip laser to balloon angioplasty.
  
  
  METHODS
  Prospective randomised clinical trial.
  
  
  METHODS
  Patients with either occlusion orf > 50% diameter stenosis less than 3 cm in length in the superficial femoral artery, and with two or three calf vessel run-off were eligible and randomised to receive either balloon angioplasty alone or with laser assistance. Treatment failure in follow-up was defined as reocclusion or recurrence of greater that 50% stenosis at the site of angioplasty.
  
  
  RESULTS
  Ninety limbs (82 patients) were entered into the study. Forty-four patients had mild claudication, 32 more severe symptoms and 6 rest pain or ulceration. More patients with diabetes (5 of 5, p = 0.04, Fisher's exact test) and occlusions (16 of 22, p < 0.05, chi(2)) were randomised to the laser group. Initial technical success was obtained in all lesions. The median duration of follow-up was 1 year. Failure occurred in 40 limbs during follow-up. Three segments, all with initial occlusions and undergoing laser angioplasty re-occluded within 2 days, one requiring immediate thrombectomy. Another 20 limbs underwent further intervention. Overall success (+/- S.D.) (Kaplan-Meier) at 1 year was 67% (+/- 5%) and at 2 years 43% (+/- 7%). Only increased age, initial occlusion, female sex, and not smoking were significantly (p < 0.05, Cox's proportional hazards) associated with failure; on multivariate analysis, age and occlusion were the best independent predictors. There was no significant difference (p > 0.05) in outcome between limbs undergoing laser assisted balloon angioplasty and balloon alone either overall of within the stenosis or occlusion subgroups.
  
  
  CONCLUSIONS
  This study found no significant benefit was gained by the addition of laser to balloon angioplasty and that the long term success was modest for lesions considered to be suitable for angioplasty.
authors.affiliation: University of Sydney and Westmead Hospital, Australia.
authors.forename: C M
authors.initials: CM
authors.lastname: Fisher
authors.forename: J P
authors.initials: JP
authors.lastname: Fletcher
authors.forename: J
authors.initials: J
authors.lastname: May
authors.forename: G H
authors.initials: GH
authors.lastname: White
authors.forename: R S
authors.initials: RS
authors.lastname: Lord
authors.forename: J
authors.initials: J
authors.lastname: Crozier
authors.forename: G
authors.initials: G
authors.lastname: Conner
mesh_terms: D000368:Aged; D000800:Angioplasty, Balloon / Q000706:statistics & numerical data; D017222:Angioplasty, Balloon, Laser-Assisted / Q000706:statistics & numerical data; D001157:Arterial Occlusive Diseases / Q000628:therapy; D005260:Female; D005263:Femoral Artery / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D007383:Intermittent Claudication / Q000628:therapy; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012008:Recurrence; D016019:Survival Analysis; D013997:Time Factors; D017211:Treatment Failure