ObjectiveCentral venous pressure measurement is an effectivemethod to detect the volume status of the patients.However, life-threatening complications such aspneumothorax may occur. We assume that ultrasonographicmeasurements may be used as a surrogateof invasive central venous pressure.Materials and MethodsOur study has been conducted between January2015-January 2016 on 81 patients who were overthe age of 18 and to whom a central venous catheterhas been placed in the internal jugular vein (IJV)in our Emergency Intensive Care Unit. The height ofthe blood column in the internal jugular vein, internaljugular vein collapsibility index (IJV-CI) and the cavalindex (CI) of vena cava inferior have been measuredby ultrasound. Then, invasive central venous pressure(CVP) has been measured and the patients wereseparated into two groups as low CVP and normalCVP groups and statistically significance was soughtbetween groups in regard of these three methods.ResultsThe mean age was 68.58±13.33 years. Fifty-four ofthe patients (66.6%) were male. Forty-six patients(56.8%) were mechanically ventilated. Low CVPgroup consisted of 62 patients (76.5%). Mean invasiveCVP was 4.83±4.26 mmHg. There were significantcorrelations between IJV-CI and invasive CVP alongwith the CI (r=-0.267, p=0.016 and r=0.319, p=0.04,respectively), IJV height method and CI as well asinvasive CVP measurement (r=-0.231, p=0.03 andr=0.357, p=0.01, respectively). The CI did not yieldany correlation between invasive CVP measurement(r=-0.010, p=0.368).ConclusionNoninvasive central venous pressure measurementmethods may be used as a surrogate for invasivecentral venous pressure levels. The IJV-CI may bea useful tool to estimate CVP. Measurements of IJVyields better results than the measurements fromvena cava inferior (VCI) especially in volume depletedpatients.