Akhila Swarnakumar, Bhavna Saxena, Savita Babbar, Keerty Sharma. "Baseline perfusion index as a predictor of hypotension following spinal anaesthesia in elderly patients undergoing lower limb orthopaedic surgery." Indian Journal of Clinical Anaesthesia (2026). https://doi.org/10.18231/j.ijca.10911.1766397207