Comparison of effect between Erector Spinae plane block and conventional opioid treatment after cardiac surgery. In group A will be erector spinae plane block provided in the thoracic part of the body, under ultrasound control. In the group B will be analgesia provided by Pethidine. Numerical pain score will be recorded every 2 hours, also usage of analgetics will be recorded in both groups.
Comparison of effect between Erector Spinae plane block and conventional opioid treatment after cardiac surgery