Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department of Radio - Diagnosis

Introduction: Central venous pressure is among the most widely used parameters to assess for hydration status in renal dialysis patients and guiding fluid therapy. However, assessment of CVP via insertion of a central venous catheter is an invasive procedure which carries variable risks. The aim of the work: To investigate the accuracy of CVP measured by ultrasonography of the internal jugular vein in hemodialysis patients in comparison with CVP measured via central venous catheter. Materials and methods: The current study included one hundred and six patients. All patients were subjected to assessment of CVP through the already applied central venous catheters as well as by high resolution ultrasound of the internal jugular vein.Two ultrasonographic methods were used, in method 1 the vertical height between collapsing point of IJV and sternal angle was measured then 5 cmH20 were added, while in method 2 the calculation of IJV/CCA cross-sectional area ratio was done. Results: A highly significant positive correlation was found between both method1 and method 2 and the invasive CVP measurement through central venous catheter(CVPi), while there was no significant correlation was found between patient sex, presence of DM, presence of HTN or the examined side, and between CVPi. Conclusion: Ultrasonography of the internal jugular vein appears to be a simple, cheap, reliable and non-invasive technique which could be used for repeated monitoring of the central venous pressure even in the patients dialyzed using an arteriovenous fistula and consequently do not have a central venous line available

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