Background: Hypotension is common under Spinal- anesthesia and can cause organ hypoperfusion and ischemia if not corrected. Objective: to evaluate the efficacy of preoperative Inferior Venacava collapsibility (IVC CI) and Caval Aorta index (IVC: AO) for predicting post -spinal- anesthesia-Hypotension (PSAH) Methods: 60 ASA physical-status I and II adult patients posted for elective orthopedic surgeries under spinal anesthesia in a supine position were included. Using an ultrasound machine maximum(IVCD max) and minimum(IVCD min) internal anteroposterior (AP) diameters of the IVC at the end of expiration and inspiration respectively over the same respiratory cycle were measured during Prespinal-anesthesia. The maximum internal AP diameter of the abdominal Aorta was measured during systole. CI and IVC:AO index were calculated. When IVCCI >45%, and IVC: Aorta index <1.2, hypotension was predicted. Spinal- anesthesia was given to achieve T8-10 spinal blockade. NIBP was recorded 1-30 min in post spinal period. Hypotension after spinal anesthesia was noted.

Preoperative IVC CI and IVC: AO, prediction, post spinal hypotension