title: Sutureless nonocclusive bypass surgery in combination with an expanded polytetrafluoroethylene graft. Laboratory investigation.
abstract: OBJECTIVE
  Cerebral aneurysms that cannot be treated by clip or coil placement can be treated with high-flow bypass surgery using techniques such as the excimer laser-assisted nonocclusive anastomosis (ELANA). To simplify the technique, a sutureless ELANA (SELANA) was developed in combination with an expanded polytetrafluoroethylene (ePTFE) graft.
  
  
  METHODS
  In 18 rabbits a bypass was constructed on the abdominal aorta using the SELANA technique with an ePTFE graft, resulting in 18 bypasses and 36 anastomoses. Short-term effects were analyzed in the first 2 weeks and at 2 and 3 months after the procedure. Patency was evaluated using quantitative ultrasound flowmetry. The anastomotic sites were studied using scanning electron microscopy.
  
  
  RESULTS
  Construction of the bypass using the SELANA technique was easier and faster (15-25 minutes) compared with bypasses made with the ELANA technique (> 90 minutes). At the end of follow-up, 16 of 18 bypasses were patent. Of 36 SELANA anastomoses, 32 could be completed without short temporary occlusion of the recipient vessel. Scanning electron microscopy showed complete coverage of all anastomoses with neointimal repair tissue after 10 days.
  
  
  CONCLUSIONS
  The SELANA technique provides further advantages over the conventional ELANA technique in ease of use and shortening of procedure time. The patency rate in this series was 89% and neointima repair tissue at the anastomosis site was complete after 10 days. Further experimental studies of the long-term patency and safety of this technique are necessary before clinical application.
authors: Rudolf Magnus Institute of Neuroscience, Department of Neurosurgery, University Medical Center Utrecht, The Netherlands. J.P.Bremmer@umcutrecht.nl
authors: Jochem P
authors: JP
authors: Bremmer
authors: Bon H
authors: BH
authors: Verweij
authors: Albert
authors: A
authors: Van der Zwan
authors: Michael M
authors: MM
authors: Reinert
authors: Hendricus J Mansvelt
authors: HJ
authors: Beck
authors: Cornelis A F
authors: CA
authors: Tulleken
mesh_terms: D000818:Animals; D001807:Blood Vessel Prosthesis; D002548:Cerebral Revascularization / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D002560:Cerebrovascular Circulation; D002561:Cerebrovascular Disorders / Q000209:etiology; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D008855:Microscopy, Electron, Scanning; D011138:Polytetrafluoroethylene; D011817:Rabbits; D013524:Surgical Flaps; D013525:Surgical Instruments; D013536:Suture Techniques; D014654:Vascular Patency
chemical_list: D011138:Polytetrafluoroethylene