Determination of Tramadol as an Adjuvant to Ropivacaine in Utrasound Guided Erector Spinae Plane Block for Postoperative Analgesia after Sternotomy

The erector spinae plane (ESP) block, which is guided by ultrasound, is helpful in thoracoabdominal surgeries for managing postoperative pain. With the increased use of adjuvants in local anaesthetics, the duration of the block can be extended. In this case,

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