title: [Indications and rate of repeat studies in the color duplex department of a radiology university clinic].
abstract: OBJECTIVE
  Who refers patients for a color duplex ultrasonography (CDUS) in the routine work of a radiological university department and how frequent are repeat examinations?
  
  
  METHODS
  1110 patients had at least one CDUS examination between 5/97 and 5/98. The specialities of the referring physicians/primary examiners and the inpatient or outpatient status of the patients were documented at the first consultation. Additionally the patients were asked by the medical staff, whether, how often, and by whom ultrasonographic, CT, or MR examinations of the same organ system had been carried out during the last 4 weeks without evidence of any clinical changes.
  
  
  RESULTS
  97% of the 1118 patients were referred by one of the university departments. The arterial system was exclusively investigated in 58% and the venous system in 29% of the cases. 81% of the 651 arterial examinations were requested by the Departments of Vascular/Cardiac Surgery and Radiology. 75 repeated ultrasonographic examinations were documented in 67 (6%) of the 1118 consultations. Repetitions were documented in 8% of the arterial and in 3% of the venous examinations. X-ray angiographies were already done or planned in 105 of the 625 arterial CDUS (16%). Ultrasonographic referrals with parallel phlebographies (1% of 320 venous indications) as well as parallel CT and MR examinations (1% of the 1118 consultations, respectively) were the exception.
  
  
  CONCLUSIONS
  In the described setting, CDUS was mainly used to assess the arterial vascular system prior to vascular surgery and radiological interventions. Repeat ultrasonographies alone (6%) and parallel examinations altogether (14%) were observed less frequently than expected.
authors.affiliation: Institut und Poliklinik für Radiologische Diagnostik, Universität zu Köln. Barbara.Krug@medizin.uni-koeln.de
authors.forename: B
authors.initials: B
authors.lastname: Krug
authors.forename: H
authors.initials: H
authors.lastname: Stützer
authors.forename: M
authors.initials: M
authors.lastname: Zähringer
authors.forename: G
authors.initials: G
authors.lastname: Winnekendonk
authors.forename: O
authors.initials: O
authors.lastname: Schulte
authors.forename: D
authors.initials: D
authors.lastname: Wittig
authors.forename: F
authors.initials: F
authors.lastname: Schellhammer
authors.forename: K
authors.initials: K
authors.lastname: Lackner
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002318:Cardiovascular Diseases / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000628:therapy; D002648:Child; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010348:Patient Care Team / Q000706:statistics & numerical data; D011872:Radiology Department, Hospital / Q000706:statistics & numerical data*; D012017:Referral and Consultation / Q000706:statistics & numerical data*; D018615:Ultrasonography, Doppler, Color / Q000706:statistics & numerical data*; D019564:Unnecessary Procedures / Q000706:statistics & numerical data*; D014600:Utilization Review