title: Internal jugular vein/common carotid artery cross-sectional area ratio and central venous pressure.
abstract: OBJECTIVE
  To investigate the accuracy of the sonographic assessment of internal jugular vein/common carotid artery (IJV/CCA) cross-sectional area ratio in predicting central venous pressure (CVP) in critically ill patients.
  
  
  METHODS
  In adult patients who underwent central venous catheterization for monitoring of hemodynamic status, we used bedside sonography for diameter and cross-sectional area measurement of IJV and CCA. The IJV/CCA ratio was then calculated, and its correlation with CVP as well as its sensitivity, specificity, and positive and negative predictive values were analyzed.
  
  
  RESULTS
  We enrolled 52 patients with a mean age of 58.8 ± 10.7 years. The mean IJV/CCA ratio was 1.89 ± 0.83 and 1.90 ± 0.83, respectively, at inspiration and expiration. A significant correlation was observed between IJV/CCA ratio and CVP (r = 0.728, p < 0.0001 at inspiration, and r = 0.736, p < 0.0001 at expiration). Sensitivity was 90%, specificity 86.36%, positive predictive values 90%, and negative predictive values 86.36% for the prediction of CVP <10 cm H2 O.
  
  
  CONCLUSIONS
  Assessing the IJV/CCA ratio with a portable sonographic device could be a noninvasive alternative for central venous catheterization in order to evaluate the hemodynamic status of critically ill patients. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 44:312-318, 2016.
authors.affiliation: Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Hooman
authors.initials: H
authors.lastname: Hossein-Nejad
authors.affiliation: Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Payam
authors.initials: P
authors.lastname: Mohammadinejad
authors.affiliation: Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Faezeh
authors.initials: F
authors.lastname: Ahmadi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017536:Carotid Artery, Common / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D002496:Central Venous Pressure / Q000502:physiology*; D016638:Critical Illness; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014463:Ultrasonography / Q000379:methods*
keywords: carotid artery; central venous pressure; common; jugular vein; sensitivity and specificity; ultrasonography