title: Is traditional reading of the bedside chest radiograph appropriate to detect intraatrial central venous catheter position?
abstract: BACKGROUND
  Traditionally, the positioning of central venous catheters (CVCs) outside the right atrium (RA) in patients receiving intensive care is determined by surrogate landmarks on bedside chest radiographs (CXRs). The validity of this method was examined by comparing readings of radiologists with the results of transesophageal echocardiography (TEE).
  
  
  METHODS
  Prospective study at university hospital. Two hundred thirteen adults scheduled for cardiothoracic surgery were randomized to right or left internal jugular vein catheterization under ECG guidance. One senior radiologist and two radiologists in training independently read the CXRs, and determined whether the CVC tip ended in the RA and measured the vertical distance from the CVC tip to the carina (TC-distance).
  
  
  RESULTS
  Two hundred twelve CVC tips could be identified by TEE. Only left-sided CVCs (n = 5) ended in the upper RA (2.4%). Three of those patients were shorter than 160 cm. Specificity was 94% for senior radiologist, 44% for the first radiologist in training, and 60% for the second radiologist in training. The TC-distance of intraatrial catheters was 39, 55, 59, 80, and 83 mm, respectively. Thus, a TC-distance < or = 55 mm ensured extraatrial tip position in four of five intraatrial CVCs (80%, p = 0.002). The TC-distance of extraatrial catheters ranged from - 26 to 102 mm.
  
  
  CONCLUSIONS
  Reading of a bedside CXR alone is not very accurate to identify intraatrial CVC tip position. TC-distance is a helpful marker, and its specificity is as good as that of an experienced radiologist if a cutoff value of 55 mm is chosen.
authors.affiliation: Department of Anesthesiology and Intensive Care Medicine, Friedrich-Schiller-University Jena, Jena, Germany.
authors.forename: Melanie
authors.initials: M
authors.lastname: Wirsing
authors.affiliation: Department of Anesthesiology and Intensive Care Medicine, Friedrich-Schiller-University Jena, Jena, Germany.
authors.forename: Claudia
authors.initials: C
authors.lastname: Schummer
authors.affiliation: Institute of Diagnostic and Interventional Radiolog, Friedrich-Schiller-University Jena, Jena, Germany.
authors.forename: Rotraud
authors.initials: R
authors.lastname: Neumann
authors.affiliation: Institute of Diagnostic and Interventional Radiolog, Friedrich-Schiller-University Jena, Jena, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Steenbeck
authors.affiliation: Institute of Diagnostic and Interventional Radiolog, Friedrich-Schiller-University Jena, Jena, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Schmidt
authors.affiliation: Department of Anesthesiology and Intensive Care Medicine, Friedrich-Schiller-University Jena, Jena, Germany. Electronic address: cwsm.schummer@gmx.de.
authors.forename: Wolfram
authors.initials: W
authors.lastname: Schummer
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002405:Catheterization, Central Venous / Q000379:methods*; D017548:Echocardiography, Transesophageal; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011446:Prospective Studies; D013902:Radiography, Thoracic / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity