The main goal of this randomised double-blinded controlled trial is to assess whether adding anterior quadratus lumborum block preoperatively can reduce intraoperative and postoperative opioid consumption, reduce pain after abdominal hysterectomy and improve quality of recovery after anesthesia. The study hypothesis is that anterior QL block bilaterally before the start of a surgery has no impact on perioperative pain relief, can't reduce the need in opioids and will not improve quality of recovery after anesthesia. All patients will undergo general anesthesia with tracheal intubation and mechanical ventilation. Patients will be randomized into two groups. In addition to general anesthesia and multimodal analgesia with parenteral medication II (QL) group will receive also anterior quadratus lumborum block as a regional component.
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Pain level after surgery
Timeframe: It will be checked at the folowing stages of the study: 30 minutes (m30) 6 hours (h6), 12 hours (h12), 24 hours (h24), 48 hours (h48) after the end of the surgery.
Requirement of morphine for 24 hours
Timeframe: 24 hours (h24), 48 hours (h48) after the surgery
Intraoperative fentanyl consumption
Timeframe: Intraoperative stage, at the end of the surgery (h0)