The purpose of this study is to evaluate the efficacy and safety of spinal anesthesia with
isobaric ropivacaine, compared with hyperbaric bupivacaine in geriatric patients undergoing
lower limb orthopedic surgery.
Purpose: This prospective, randomised, controlled, single-blind, multicentre study was
designed to investigate the effects of peripheral nerve block methods (applied using
unilateral spinal anaesthesia [USA] on elderly patients scheduled to undergo total knee
arthroplasty) on perioperative haemodynamic parameters and the postoperative analgesia
period.
Materials and Methods: Sixty patients in the American Society of Anesthesiologists (ASA)
Physical Status II-III group were randomly divided into two groups. Spinal anaesthesia was
performed in the USA group, in the lateral position through the intervertebral space, with 2
ml of hyperbaric bupivacaine (L4-L5 or L3-L4); 0.5% bupivacaine hydrochloride and 2%
lidocaine were combined for the psoas compartment-sciatic (PCS) group, and the mixture was
used for psoas compartment block (PCB) and sciatic nerve block. The haemodynamic parameters
were recorded every 5 minutes until the end of the preoperative and perioperative operation
periods and postoperative first analgesic application time.