Effect of Intraoperative Dexmedetomidine on Early Postoperative Cognitive Dysfunction

Inclusion Criteria: * American society of Anesthesiology (ASA) status of I-III * Age between 60-75 years scheduled for elective hip surgery under spinal anesthesia Exclusion Criteria: * Patient not willing to be a part of the study * Patients were aged \<60 or \>75 years * Patients with accompanying medical conditions that may affect the level of consciousness, such as stroke, stupor or dementia, or patients with abnormalities in hepatic or renal function, electrolyte imbalance * Patients suffering from preoperative bradycardia \[heart rate (HR) \<60 bpm\] or hypotension \[mean arterial blood pressure (MAP) \<70 mmHg\] * Patients who had recently received a sedative or opioid drug * Patients with a MoCA (Montreal Cognitive Assessment) score \<26 * Patients with persistent hypotension and bradycardia intra-operatively even after giving Mephentermine will be excluded from the study