title: [Invasive stroke treatment - Study results and clinical routine : Lost in translation?].
abstract: OBJECTIVE
  How can the overwhelmingly positive results of the five randomized thrombectomy trials published in 2015 be transferred to the clinical routine?
  
  
  METHODS
  Analysis of trial-specific characteristics with regard to implementation of mechanical thrombectomy into clinical routine.
  
  
  RESULTS
  Stroke patients with symptomatic proximal artery occlusion are principally eligible for mechanical thrombectomy; however, the stroke patients included in the thrombectomy trials are not representative of all stroke patients. They were carefully selected according to clinical and imaging criteria as well as to the time window from symptom onset. Furthermore, they were treated in highly selected specialized stroke centers. Analysis of the five trials and the Catalan population-based SONIIA registry revealed that the observed number needed to treat (NNT) of 5 to reach a modified Rankin scale (mRS) score of 0-2 only applies to approximately 1 % of all stroke patients. The NNT for the remaining patients who are principally eligible for thrombectomy requires further study. Currently, centralization seems to be useful to facilitate mechanical thrombectomy in routine care leading to several problems that have to be dealt with in particular regions. Secondary transport to thrombectomy centers plays a major role in this context and has to be provided with highest priority.
  
  
  CONCLUSIONS
  Only careful analysis of study results and the background circumstances will enable adequate organization and successful practical implementation of this highly effective therapy in the clinical routine. Regional conditions have to be considered and will be crucial in this context.
authors.affiliation: Neurologische Klinik, Universitätsklinik Erlangen, 91054, Erlangen, Deutschland. lorenz.breuer@uk-erlangen.de.
authors.forename: L
authors.initials: L
authors.lastname: Breuer
authors.affiliation: Neurologische Klinik, Universitätsklinik Erlangen, 91054, Erlangen, Deutschland.
authors.forename: S
authors.initials: S
authors.lastname: Schwab
authors.affiliation: Neurologische Klinik, Universitätsklinik Erlangen, 91054, Erlangen, Deutschland.
authors.forename: M
authors.initials: M
authors.lastname: Köhrmann
mesh_terms: D002986:Clinical Trials as Topic; D019317:Evidence-Based Medicine; D006801:Humans; D061185:Mechanical Thrombolysis / Q000706:statistics & numerical data*; D063868:Patient Outcome Assessment; D015995:Prevalence; D018401:Sample Size; D020521:Stroke / Q000175:diagnosis / Q000453:epidemiology* / Q000601:surgery*; D016896:Treatment Outcome
keywords: Clinical trial; Ischemic stroke; Mechanical thrombectomy; Medical care structure; Thrombolysis