title: Sonographic incidence of deep venous thrombosis contralateral to hip or knee replacement surgery.
abstract: OBJECTIVE
  This study assesses the sonographic incidence of deep venous thrombosis (DVT) contralateral to and the venographic incidence ipsilateral to hip or knee replacement surgery and the role of sonography in routine surveillance.
  
  
  METHODS
  We prospectively evaluated 178 consecutive patients with sonography of the femoropopliteal venous systems of the contralateral lower extremity and venography of the ipsilateral lower extremity on days 3 and 4, respectively, after total hip or knee replacement surgery.
  
  
  RESULTS
  No cases of acute DVT and only 1 case of chronic DVT isolated to the popliteal system were identified by sonography in the contralateral extremity. In the ipsilateral extremity, venography identified 26 patients with acute DVT (3 femoropopliteal, 21 calf, and 2 concurrent femoropopliteal and calf).
  
  
  CONCLUSIONS
  Routine sonographic evaluation of the lower extremity contralateral to hip or knee replacement surgery is not cost-effective because of the extremely low incidence of detectable acute thrombus.
authors.affiliation: Department of Radiology, Penn State University, Milton S. Hershey Medical Center, Hershey 17033, USA.
authors.forename: S
authors.initials: S
authors.lastname: LaRusso
authors.forename: J R
authors.initials: JR
authors.lastname: Hills
authors.forename: S W
authors.initials: SW
authors.lastname: Wise
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D005260:Female; D005268:Femoral Vein / Q000000981:diagnostic imaging*; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D010690:Phlebography; D011152:Popliteal Vein / Q000000981:diagnostic imaging*; D011183:Postoperative Complications; D011446:Prospective Studies; D014463:Ultrasonography; D020246:Venous Thrombosis / Q000000981:diagnostic imaging* / Q000209:etiology