Postoperative Pain and Analgesic Use After Total Knee Arthroplasty

Inclusion Criteria: * Age 18-100 years * Primary total knee arthroplasty (TKA) * ASA physical status I-III * Glasgow Coma Scale (GCS) score of 15 * Ability to understand study procedures and provide informed consent * Ability to cooperate during pre-anesthetic evaluation * No severe sensory impairment (e.g., blindness, deafness) Exclusion Criteria: * Revision or reoperation of TKA * ASA score IV or higher * Refusal to participate or inability to provide informed consent * GCS ≤ 14 * Limited legal capacity * Active psychiatric disorder * Chronic use of strong opioid analgesics * Neurological disease affecting pain perception or cooperation * Cognitive impairment or language barrier preventing questionnaire completion * Use of anesthesia techniques other than GA + PNB or SA + PNB (e.g., epidural anesthesia, local infiltration without PNB)