title: Safety and efficacy of directional atherectomy for the treatment of in-stent restenosis of the femoropopliteal artery.
abstract: OBJECTIVE
  The aim of this study was to evaluate safety and efficacy of directional atherectomy with the Silver HawkTM device as first line treatment for in-stent restenosis of the femoropopliteal artery.
  
  
  METHODS
  Over a period of 1.5 years in-stent restenosis of the femoropopliteal artery in 35 lesions (34 legs, 33 patients) was primarily treated with directional atherectomy. Primary endpoint was treatment success (<50% residual stenosis) and the absence of complications. Secondary endpoint was target lesion patency after 3, 6 and 12 month assessed by duplexsonography.
  
  
  RESULTS
  Mean patient age was 70 years (SD+/-10). 74 % were claudicants (Rutherford 2-3), 26% had CLI (Ruther-ford (4-5). 45% were diabetics, 82% had a history of arterial hypertension and nicotine abuse. Mean lesion length was 108 mm (SD+/-102 mm). Treatment success with atherectomy alone was achieved in 86% with additional PTA (43%) success increased to 97%. Adjunctive stent implantation was necessary in 11% of the cases. Post interventional ABI increased from 0.54 (+/-0.26) to 0.77 (+/-0.26). The rate of minor complication was 3% (1/34) and the rate of major complication was 18% (6/34), mainly due to distal embolization. Target lesion patency at 3 month was 86.2%, at 6 month 68% and at 12 month 25%.
  
  
  CONCLUSIONS
  Although atherectomy of in-stent restenosis as a first line treatment yields a high initial success rate with a low requirement for adjunctive PTA and stent implantation, long term patency rates are low. In our study the theoretical advantage of avoiding barotauma did not result in prevention of recurrent intimal hyperplasia.
authors.affiliation: Clinic for Diagnostic Radiology, Schleswig Holstein University Clinic, Kiel Campus, Kiel, Germany. j.trentmann@rad.uni-kiel.de
authors.forename: J
authors.initials: J
authors.lastname: Trentmann
authors.forename: N
authors.initials: N
authors.lastname: Charalambous
authors.forename: M
authors.initials: M
authors.lastname: Djawanscher
authors.forename: J -P
authors.initials: J-
authors.lastname: Schäfer
authors.forename: T
authors.initials: T
authors.lastname: Jahnke
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000800:Angioplasty, Balloon / Q000009:adverse effects / Q000295:instrumentation*; D001157:Arterial Occlusive Diseases / Q000175:diagnosis / Q000628:therapy*; D017073:Atherectomy / Q000009:adverse effects / Q000295:instrumentation; D003251:Constriction, Pathologic; D005260:Female; D005263:Femoral Artery / Q000000981:diagnostic imaging; D005858:Germany; D006801:Humans; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery / Q000000981:diagnostic imaging; D011446:Prospective Studies; D011859:Radiography; D012008:Recurrence; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome; D018616:Ultrasonography, Doppler, Duplex; D014654:Vascular Patency