The Efficacy of Combined Intrathecal Morphine and PENG Block on Postoperative Pain in Hip Arthroplasty

Inclusion Criteria: * Aged between 18 and 90 years * American Society of Anesthesiologists (score ranging from 1 to 4) * Anterior hip arthroplasties Exclusion Criteria: * Patients with a history of opioid addiction * Individuals under the age of 18 * Those aged 90 and above * Allergies to morphine, fentanyl, bupivacaine, or tramadol * Coagulopathy * Infection at the injection site * Severe cardiac, renal, or hepatic dysfunction * Cases unable to provide informed consent * Body Mass Index \>40 kg/m2 * Known neurological or anatomical deficits in the lower extremities * Patients requiring a transition from spinal anesthesia to general anesthesia