title: Predictors of Failure of Closure in Percutaneous EVAR Using the Prostar XL  Percutaneous Vascular Surgery Device.
abstract: OBJECTIVE
  To identify predictors of failure in percutaneous endovascular aneurysm repair (P-EVAR) using the Prostar XL Percutaneous Vascular Surgery Device (Abbot Vascular, Santa Clara, CA, USA) and the need for conversion to conventional femoral cutdown (O-EVAR).
  
  
  METHODS
  Consecutive patients who underwent P-EVAR with the Prostar XL device between January 2009 and April 2012 were included in this series. Patients with a circular calcified common femoral artery (CFA) oncomputed tomography angiography were operated using O-EVAR and were therefore excluded. To identify predictors of success of closure in P-EVAR, artery characteristics, sheath size used, and comorbidities were analyzed in a univariate logistic regression model.
  
  
  RESULTS
  Percutaneous access was achieved in 154 femoral access sites with conversion to O-EVAR was needed in10 (6.5%). Significant predictors of conversion included sheath size (continuous, relative risk [RR] 1.50, p < .03)and the ratio between sheath size and CFA diameter >0.75 (RR 8.93, p < .01). Variables such as calcification quantity scores, CFA diameter, body mass index, and comorbidities were not significant.
  
  
  CONCLUSIONS
  The data demonstrate that sheath size, in particular, combined with CFA diameter predicts failure of closure in P-EVAR using the Prostar XL device. This ratio can be utilized to help in decision making with regard to the EVAR approach. A ratio of >0.75 would favor a primary open groin approach.
authors.forename: M P
authors.initials: MP
authors.lastname: Rijkée
authors.forename: R G
authors.initials: RG
authors.lastname: Statius van Eps
authors.forename: J J
authors.initials: JJ
authors.lastname: Wever
authors.forename: H
authors.initials: H
authors.lastname: van Overhagen
authors.forename: L C
authors.initials: LC
authors.lastname: van Dijk
authors.forename: B
authors.initials: B
authors.lastname: Knippenberg
mesh_terms: D000368:Aged; D000792:Angiography; D019917:Blood Vessel Prosthesis Implantation; D002114:Calcinosis / Q000000981:diagnostic imaging / Q000601:surgery*; D057510:Endovascular Procedures / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D005260:Female; D005263:Femoral Artery / Q000000981:diagnostic imaging / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D007902:Length of Stay; D016015:Logistic Models; D008297:Male; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome