Sacral Unilateral Spinal Anaesthesia With 0.25% Hypobaric Bupivacaine

s: Background And Objectives: The geriatric patients with limited reserved organs are very prone to develop cardiovascular instability during surgical procedures. Various anaesthetic techniques are advocated for the above purpose. Spinal anaesthesia is one of them and very useful in lower limb surgeries although it is frequently complicated with hemodynamic instability. Unilateral spinal anaesthesia on the surgical side through the dorsal foramen of the sacrum with local hypobaric anaesthetic contributes the hemodynamic stability. METHODS: 100 patients with physical status ASA II and III were submitted to sacral spinal anesthesia in the lateral position with the surgical side uppermost. They were administered 3ml of 0.25% of injection bupivacaine through the 2nd dorsal sacral foramen and maintained the same position for another 15 minutes. RESULTS: All patients developed the sensory and motor block in the uppermost lower limb without hemodynamic instability throughout the operative period including postoperative one. Blood pressure and pulse showed almost static within the normal range of short variation. CONCLUSION: Hypobaric bupivacaine (7.5 mg) produced both motor and the sensory block of the uppermost leg without hemodynamic disturbance when administered through the 2nd dorsal foramen of the sacrum in the lateral position of patients.