Comparison Of Efficacy Of Hyperbaric Ropivacaine 0.75% With Hyperbaric Levobupivacaine 0.5% In Subjects Undergoing Lower Limb Orthopaedic Surgeries Under Spinal Anaesthesia - A Randomised Control Study . Int. J. Environ. Sci. Published online September 29, 2025:2585-2591. doi:10.64252/s2qdmd08