• Caner Genc, Cengiz Kaya, Sezgin Bilgin, Burhan Dost, Yasemin Burcu Ustun, and Ersin Koksal.
• Department of Anesthesiology and Reanimation, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey.
• J Clin Anesth. 2022 Aug 1; 79: 110691.

Study ObjectiveBreast cancer is quite common in women, and surgery is the most effective treatment in most cases. This study compared the effects of ultrasound (US)-guided erector spinae plane block (ESPB) and pectoserratus plane block (PSPB) on the postoperative opioid consumption and acute and chronic pain in patients after breast cancer surgery.DesignProspective, randomized, single-blind.SettingUniversity hospital.PatientsThis study included 90 patients (ASA I-II) who underwent segmental mastectomy and sentinel lymph node biopsy at the hospital of Ondokuz Mayis University, Samsun.InterventionsThe patients were divided into the ESPB group, PSPB group, and control group. Intraoperatively, all patients were administered intravenous tenoxicam (20 mg) and paracetamol (1 g) as part of multimodal analgesia. Intravenous morphine via patient-controlled analgesia was administered in all groups postoperatively.MeasurementsThe primary outcome was the total morphine consumption in the first 24 h after surgery. The secondary outcomes included visual analog scale pain scores of the arm at rest and at abduction in the first 24 h and at 3 months postoperatively, intraoperative remifentanil consumption, number of patients requesting rescue analgesia, incidence of nausea and vomiting, time to the first request for analgesia via patient-controlled analgesia.Main ResultsPostoperative 24-h morphine consumption, visual analog scale scores at rest and at abduction, and intraoperative remifentanil consumption were lower in the ESPB and PSPB groups than in the control group. Time to the first request for analgesia via patient controlled analgesia was longer in the ESPB and PSPB groups than in the control group. In the PSPB group, none of the patients needed rescue analgesia.ConclusionsUS-guided ESPB and PSPB performed in patients who underwent breast cancer surgery showed similar and modest analgesic effects on the postoperative opioid consumption and acute and chronic pain scores.Copyright © 2022 Elsevier Inc. All rights reserved.

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