Prevention of Shivering Associated With Spinal Anesthesia

Dexmedetomidine Versus Ketamine to Prevent Shivering Associated With Intrathecal Anesthesia in Patients Undergoing Knee Arthroscopy:A Randomized, Controlled Double Blinded Study.

The aim of the study is to compare the effectiveness of prophylactic use of intravenous (IV) dexmedetomidine VS ketamine and meperidine(as a control group) in prevention of shivering associated with intrathecal anesthesia in patients undergoing knee arthroscopy

Inclusion Criteria:

- BMI 20-30 Scheduled patients for knee arthroscopy under spinal anesthesia. American Society of Anesthesiologists (ASA) physical status: I and II

Exclusion Criteria:

• Patient refusal Aged less than 18 years or lesser than 150 cm in height Pregnant woman Allergy to the studied drugs. Patients with contraindications to spinal anesthesia. Patients with advanced decompensated cardiac, respiratory,renal or hepatic diseases, ASA III-IV Coagulopathy or thrombocytopenia CNS diseases as epilepsy, stroke or psychiatric illness.