Comparing Height-Based and Fixed Spinal Anesthesia Doses in Older Adults Undergoing Lower Limb Orthopedic Surgery for Better Heart Stability and Anesthetic Effects

What this Trial Is About

Researchers are evaluating whether using a height-based dosing method for spinal anesthesia provides better heart and blood pressure stability along with improved anesthetic effects compared to a fixed dose in elderly patients undergoing lower limb orthopedic surgeries. The study aims to determine if height-based dosing reduces risks of low blood pressure and slow heart rate during surgery and whether it improves the onset and duration of sensory and motor block. This investigation focuses on patients aged 60 to 80 scheduled for elective lower limb surgeries under spinal anesthesia. Participants will be randomly assigned to one of two groups. Group A will receive a dose of 0.07 mg per cm of 0.5% Hyperbaric Bupivacaine combined with 2 mg of preservative-free Dexamethasone injected into the spinal space. Group B will receive a conventional fixed dose of 12.5 mg of 0.5% Hyperbaric Bupivacaine with the same amount of Dexamethasone. Spinal anesthesia will be administered in the sitting position at the L3-4 vertebra, followed by monitoring sensory and motor block using standard techniques. Patients will be positioned supine after injection for assessment. During the procedure, heart rate and blood pressure will be continuously monitored to detect bradycardia and hypotension. Sensory and motor block onset and duration will be recorded until their resolution. Data including demographics and clinical characteristics will be collected and securely stored for analysis. The study includes preloading with IV fluids before anesthesia and follows patients in the early postoperative period to monitor anesthetic effects. Participation lasts through surgery and immediate recovery, with all safety data documented carefully.

HEIGHT-BASED AND CONVENTIONAL SPINAL ANAESTHETIC DOSING IN GERIATRIC PATIENTS