the aim is to compare the effects of two different doses of intraarticular ketamine on postoperative pain scores and analgesic requirements.in knee artroscopy
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Change in postoperative pain scores throughout time evaluated by VAS
Timeframe: VAS scores at rest and during activity will be evaluated for 24 hours. The first measurement will be recorded immediately after surgery and at 30 minutes interval for the first hour. Afterwards at 2.4.6.12.24.hours postoperatively.
Difference in opioid Sparing effect measured through morphine amount delivered by a patient controlled analgesia device.
Timeframe: Total amount off delivered morphine will be recorded for 24 hours.