Patients undergoing minimally invasive mitral valve reconstruction via small thoracotomy are randomized into two groups. The intervention group receives serratus anterior plane block after minimally invasive mitral-valve reconstruction, following 48h infusion with ropivacaine 2% continually. The control group receives a placebo pump without infusion. Primary endpoints are perceived pain using a numeric pain rating scale and opioid consumption during the hospital stay.
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Difference of Numeric Rating Scale after MIC-MKR
Timeframe: within 12, 24 and 48 hours after surgery