title: Hip aspiration: a cost-effective and accurate method of evaluating the potentially infected hip prosthesis.
abstract: OBJECTIVE
  The accuracy of fluoroscopy-guided hip aspiration in the diagnosis of infection in hip prostheses was evaluated.
  
  
  METHODS
  Results from 147 preoperative aspiration cultures were compared with results of operative cultures. The relative costs of aspiration and nuclear medicine studies were also compared.
  
  
  RESULTS
  With the operative culture results as the standard, sensitivity of hip aspiration was 92.8% and specificity was 91.7%. The negative and positive predictive values were 99.2% and 54.2%, respectively. Aspiration arthrography costs approximately 20% as much as complementary technetium sulfur colloid-indium-111 granulocyte scans, the most accurate nuclear medicine study used to evaluate potentially infected hip prostheses.
  
  
  CONCLUSIONS
  Hip aspiration is an accurate and cost-effective method of evaluating the potentially infected hip prosthesis.
authors.affiliation: Department of Radiology, Emory University School of Medicine, Atlanta, GA 30322.
authors.forename: S
authors.initials: S
authors.lastname: Tigges
authors.forename: R G
authors.initials: RG
authors.lastname: Stiles
authors.forename: R J
authors.initials: RJ
authors.lastname: Meli
authors.forename: J R
authors.initials: JR
authors.lastname: Roberson
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D003362:Cost-Benefit Analysis; D005069:Evaluation Studies as Topic; D005471:Fluoroscopy / Q000191:economics; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D007430:Intraoperative Care; D011300:Preoperative Care; D011475:Prosthesis Failure; D016459:Prosthesis-Related Infections / Q000175:diagnosis* / Q000382:microbiology; D015642:Radiology, Interventional / Q000191:economics; D012086:Reoperation; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013203:Staphylococcal Infections / Q000175:diagnosis; D013212:Staphylococcus epidermidis / Q000302:isolation & purification; D013396:Suction / Q000191:economics; D007507:Therapeutic Irrigation