title: [Guidance of interventions in subintimal recanalization and fenestration of dissection membranes using a novel dual-lumen intravascular ultrasound catheter].
abstract: OBJECTIVE
  To evaluate the feasibility and effectiveness of IVUS-guided puncture for gaining controlled target lumen reentry in subintimal recanalization of chronic iliac/femoral artery occlusions and in fenestration of aortic dissections.
  
  
  METHODS
  Between 5/2004 and 12/2005 12 consecutive patients (7 male, 5 female; mean age 64.6 +/- 12.0 years) with chronic critical limb ischemia and ischemic complications of aortic dissection were treated using the Pioneer catheter. This 6.2-F dual-lumen catheter combines a 20-MHz IVUS transducer with a pre-shaped extendable, hollow 24-gauge nitinol needle. This coaxial needle allows real-time IVUS-guided puncture of the target lumen and after successful reentry a 0.014" guidewire may be advanced through the needle into the target lumen. 7 patients were treated for aortic dissection and 5 patients (with failed previous attempts at subintimal recanalization) for chronic arterial occlusion. Patients with aortic dissection (5 type A dissections, 2 type B dissections) had developed renal ischemia (n = 2), renal and mesenteric ischemia (n = 2), or low extremity ischemia (n = 3). Patients with chronic arterial occlusions (2 common iliac artery occlusions, 3 superficial femoral artery occlusions) experienced ischemic rest pain (n = 4), and a non-healing foot ulcer (n = 1).
  
  
  RESULTS
  The technical success rate using the Pioneer catheter was 100%. The recanalization/fenestration time was 37 +/- 12 min. Procedure-related complications did not occur. In 10 cases a significant improvement of clinical symptoms was evident. One patient with aortic dissection and ischemic paraplegia required subsequent surgical intervention. One patient had persistent ischemic rest pain despite successful recanalization of a superficial femoral artery occlusion.
  
  
  CONCLUSIONS
  The Pioneer catheter is a reliable device which may be helpful for achieving target lumen reentry in subintimal recanalization of chronic occlusions and in fenestration of aortic dissections.
authors.affiliation: Departement Radiologie, Neuroradiologie und Nuklearmedizin (DRNN), Institut für Diagnostische, Interventionelle und Pädiatrische Radiologie. ralph.kickuth@insel.ch
authors.forename: R
authors.initials: R
authors.lastname: Kickuth
authors.forename: K C
authors.initials: KC
authors.lastname: Ludwig
authors.forename: D-D
authors.initials: DD
authors.lastname: Do
authors.forename: M
authors.initials: M
authors.lastname: Husmann
authors.forename: I
authors.initials: I
authors.lastname: Baumgartner
authors.forename: J
authors.initials: J
authors.lastname: Triller
mesh_terms: D000368:Aged; D000784:Aortic Dissection / Q000000981:diagnostic imaging / Q000628:therapy*; D000792:Angiography; D017130:Angioplasty / Q000379:methods*; D001014:Aortic Aneurysm / Q000000981:diagnostic imaging / Q000628:therapy*; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging / Q000628:therapy*; D002908:Chronic Disease; D005240:Feasibility Studies; D005260:Female; D005263:Femoral Artery; D006801:Humans; D007083:Iliac Artery; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional