To Correlate IVC Diameter and IVC Collapsibility with Episodes of Post Spinal Hypotension

Abstract

Background & Methods: The aim of the study is to correlate IVC diameter and IVC collapsibility with episodes of post spinal hypotension. Inferior vena cava ultrasonography (IVCUS) was performed before spinal anaesthesia in group A patients: using curvililnear probe of 3.5 to 5 MHz with a B mode scan in supine position by an experienced anaesthesiologist, the transducer was placed in the subxiphoid region in a longitudinal position. Results: ROC curves above the diagonal line are considered to have reasonable discriminating ability to predict post spinal hypotension. Interpretation of the area under the ROC curve showed that the performance of baseline IVCCI (%) (AUC 0.642; 95% CI: 0.475 to 0.787) was non-significant. The patients who had post spinal hypotension, 82.61% of patients had baseline IVCCI (%) >36. If baseline IVCCI(%) >36, then there was 70.40% probability of post spinal hypotension and if baseline IVCCI(%) ≤ 36, then 69.20% chances of no post spinal hypotension. Among patients who did not have post spinal hypotension, 52.94% of patients had baseline IVCCI (%) ≤36.