Association of Inferior Vena Cava Diameter and Compressibility Index with Central Venous Pressure
Keywords:
IVC compressibility, Critical patient, IVC, CVP, POCUSAbstract
Background: In critical patients, it's often challenging to assess intravascular volume status at bedside. Central venous pressure (CVP) is commonly used to measure it in Intensive care units (ICUs) through an invasive method and associated with complications of central venous catheters (CVC). Ultrasound is alternative non-invasive tool, without radiation risk and readily available in ICUs with comparable results.
Objective: To determine the correlation between inferior vena cava (IVC) diameter and IVC Compressibility Index (CI) assessed by ultrasound with CVP value for assessing intravascular volume status in critical patients.
Methods: Cross-sectional study conducted at ICU of Mayo Hospital Lahore for a period of 6 months from January 2023 to June 2023. A total of 97 patients fulfilling selection criteria were enrolled after written informed consent. Ultrasonographic measurement of IVC diameter obtained and IVC-CI calculated. Measurement of CVP was done according to standard protocol immediately after the diameter of IVC had been measured. All findings were noted down on proforma and subjected to statistical analysis.
Results The mean age of patients was 50±13.8 years, the mean IVC diameter was 1.9±0.56 cm, the mean CVP value was 13±3.48 cm H2O and the mean IVC-CI was 48±12.36%. There was a statistically significant positive correlation between IVC diameter and CVP as was indicated by r =0.871, p <0.001 and between IVC-CI and CVP there was a statistically significant negative correlation as was indicated by r =-0.695, p <0.001.
Conclusion: The IVC diameter positively and significantly correlated with CVP value and IVC-CI negatively .............
