title: [External trabeculecomy (ETE): an alternative? A retrospective comparison with goniotrepanation].
abstract: OBJECTIVE
  The purpose of this retrospective study is to compare the results of deep sclerectomy versus trabeculectomy for IOP reduction and the respective complication rates.
  
  
  METHODS
  199 patients were treated by deep sclerectomy and 80 patients by trabeculectomy between 2000 and 2005. Retrospective results for IOP reduction, visual acuity, success, complication and re-operation rates were evaluated.
  
  
  RESULTS
  After deep sclerectomy the IOP dropped from 20.8 mmHg (+/- 6.5) to 23.8 % after 1 year, upon trabeculectomy from 27.7 mmHg (+/- 9.4) to 46.4 %. Visual acuity decreased only slightly. The success rate after a follow-up of 62.3 months (no re-operation or local post-operative treatment) was 36.7 % on treatment by deep sclerectomy compared with 56.3 % by trabeculectomy after a follow-up of 43.6 months. After 15.2 months a mean of 21.6 % of our patients who were treated by deep sclerectomy needed a re-operation, in the trabeculectomy group after 3.9 months this was the case in 17.5 %. One year after treatment by deep sclerectomy 37.2 % and after trabeculectomy 18.8 % of our patients needed glaucoma eye drops for additional local treatment.
  
  
  CONCLUSIONS
  Both treatments (deep sclerectomy and trabeculectomy) achieve a target IOP below 18 mmHg after one year. Deep sclerectomy is in special cases an efficient alternative to trabeculectomy with the right indication (for less IOP lowering or high-risk eyes).
authors.affiliation: Augenklinik, Philipps-Universität Marburg. Eschstru@web.de
authors.forename: P
authors.initials: P
authors.lastname: Eschstruth
authors.forename: J
authors.initials: J
authors.lastname: Schmidt
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000453:epidemiology* / Q000601:surgery*; D015995:Prevalence; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D014130:Trabeculectomy / Q000706:statistics & numerical data*; D016896:Treatment Outcome