Spinal anaesthesia is the most convenient anaesthetic technique that offers many advantages over general anaesthesia for certain surgical procedures. The patient will be awake, polypharmacy can be avoided and airway manipulation is not needed in spinal anaesthesia. It reduces intraoperative blood loss especially for major lower limb Orthopaedic surgeries, lesser incidence of thromboembolic events, provides reliable surgical analgesia with good muscle relaxation and adequate analgesia in the early postoperative period. After finding the suitability according to selection criteria patients were selected for the study and briefed about the nature of the study, the interventions used and written informed consent was obtained. Further, descriptive data of the patients like name, age, sex, detailed history, were obtained and recorded on predesigned and pretested proforma. In this present study, thoracic dermatome level 8 was the most commonly achieved level in both the groups. More number of patients achieved thoracic dermatome level 6 block in group C. Hence the results were statistically significant with respect to highest level of sensory block achieved.