title: Can duplex scan arterial mapping replace contrast arteriography as the test of choice before infrainguinal revascularization?
abstract: OBJECTIVE
  Arteriography is the diagnostic test of choice before lower extremity revascularization, because it is a means of pinpointing stenotic or occluded arteries and defining optimal sites for the origin and termination of bypass grafts. We evaluated whether a duplex ultrasound scan, used as an alternative to arteriography, could be used as a means of accurately predicting the proximal and distal anastomotic sites in patients requiring peripheral bypass grafts and, therefore, replace standard preoperative arteriography.
  
  
  METHODS
  Forty-one patients who required infrainguinal bypass grafts underwent preoperative duplex arterial mapping (DAM). Based on these studies, an observer blinded to the operation performed predicted what operation the patient required and the best site for the proximal and distal anastomoses. These predictions were compared with the actual anastomotic sites chosen by the surgeon.
  
  
  RESULTS
  Whether a femoropopliteal or an infrapopliteal bypass graft was required was predicted correctly by means of DAM in 37 patients (90%). In addition, both anastomotic sites in 18 of 20 patients (90%) who had femoropopliteal bypass grafts and 5 of 21 patients (24%) who had infrapopliteal procedures were correctly predicted by means of DAM.
  
  
  CONCLUSIONS
  DAM is a reliable means of predicting whether patients will require femoropopliteal or infrapopliteal bypass grafts, and, when a patient requires a femoropopliteal bypass graft, the actual location of both anastomoses can also be accurately predicted. Therefore, DAM appears able to replace conventional preoperative arteriography in most patients found to require femoropopliteal reconstruction. Patients who are predicted by means of DAM to require crural or pedal bypass grafts should still undergo preoperative contrast studies to confirm these results and to more precisely locate the anastomotic sites.
authors.affiliation: Division of Vascular Surgery, Department of Surgery, Montefiore Medical Center and Albert Einstein College of Medicine, New York, NY, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Wain
authors.forename: G L
authors.initials: GL
authors.lastname: Berdejo
authors.forename: W N
authors.initials: WN
authors.lastname: Delvalle
authors.forename: R T
authors.initials: RT
authors.lastname: Lyon
authors.forename: L A
authors.initials: LA
authors.lastname: Sanchez
authors.forename: W D
authors.initials: WD
authors.lastname: Suggs
authors.forename: T
authors.initials: T
authors.lastname: Ohki
authors.forename: E
authors.initials: E
authors.lastname: Lipsitz
authors.forename: F J
authors.initials: FJ
authors.lastname: Veith
mesh_terms: D000368:Aged; D000714:Anastomosis, Surgical; D000792:Angiography / Q000379:methods; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D005069:Evaluation Studies as Topic; D005263:Femoral Artery / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D011150:Popliteal Artery / Q000000981:diagnostic imaging* / Q000601:surgery; D018616:Ultrasonography, Doppler, Duplex