Postoperative Pain Management in Cerebral Palsy - Comparative Observational Study"

Inclusion Criteria: * Diagnosed with cerebral palsy between the ages of 3-15, * Category 2 according to the Classification of the American Society of Anesthesiology (ASA 2), * patients undergoing soft tissue release for knee or ankle flexion contracture of the lower extremity with palliative or reconstructive hip interventions Exclusion Criteria: * Any child with CP younger than 3 years old and older than 15 years has undergone * procedures without a specific diagnosis of CP, * the need for bone surgery, * requiring both hip, knee and ankle surgery in the same session, * with autonomic neuropathy, * Patients with a history of anticholinergic and vasoactive drug use or allergy to amide type local anesthetics