The aim of this randomized controlled study was to investigate the effect of injecting local anesthetic agents into the sternotomy incision site and around the drains on the amount of opioids used in the postoperative period and the healing process. The main questions it aims to answer are: * In patients undergoing open heart surgery, does the application of local anesthetic around the sternotomy incision site and chest tube(s) reduce the amount of postoperative opioid use? * In patients undergoing open heart surgery, does the application of local anesthetic around the sternotomy incision site and chest tube(s) accelerate postoperative recovery? In this study, LIDOFAST 40 mg/2 ml + 0.025 mg/2 ml will be injected into the sternotomy incision area and around the drains of the patients in the experimental group, and the amount of opioid consumed in the postoperative period will be recorded and the healing process will be observed.
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Amount of Opioid Consumed in the Postoperative Period
Timeframe: First 24 hours after open heart surgery