Inferior vena cava diameter as a predicting factor for hypotension after induction of general anesthesia in elderly patients

Abstract Background: To evaluate the use of inferior vena cava diameter (IVCD) to predict post-induction of general anesthesia (IGA) hypotension in older patients. Methods: Part I involved 60 older patients undergoing general anesthesia for surgery (group T).We determined the optimal cutoff value (OCV) of the most sensitive index (MSI) (the collapsibility index (IVCci), distensibility index, or respiratory variation rate) that best predicted post-IGA hypotension in older adult patients. Part II involved 66 older adult patients who underwent general anesthesia for surgery. In accordance with the MSI determinde in part I, patients were divided into group B (MSI ≥ OCV, n=42) and group S (MSI