Objectives: To compare the efficacy of continuous combined psoas sciatic block as a sole
anaesthetic technique with conventional combined spinal epidural anesthesia for patients
undergoing total knee arthroplasty.
Subjects and Method: Eighty patients ASA (American society of anaesthesiologists
classification) I to III with age range from 50 to 65 years old and scheduled for total knee
replacement were included in the study. Subjects were divided into two groups; the first
group (Pso/sci) received ultrasound guided with the use of nerve locator continuous psoas
sciatic block and the second group (CSE) received combined spinal epidural anesthesia. Onset
of sensory and motor block time, hemodynamic changes, contra-lateral spread, first time need
for analgesia, incidence of complications, and patient and surgeon satisfactions were
recorded.