Internal Jugular Vein Collapsibility Index as a Predictor of Hypotension

The internal jugular vein (IJV) collapsibility index has been proposed as a practical alternative of of the inferior vena cava collapsibility index (IVC-CI), as it is easily accessible using bedside ultrasonography. Several studies have demonstrated a correlation between IJV collapsibility and central venous pressure as well as right atrial pressure.

Inclusion Criteria: * Patients aged ≥ 60 years. * Scheduled for elective laparoscopic colorectal surgeries under general anesthesia. Exclusion Criteria: * Patients' refusal of procedure or participation in the study. * Severe aortic stenosis, irregular ventricular rhythm (atrial fibrillation or frequent premature ventricular contractions), or any contraindication to perform passive leg raise (PLR).