• Diab Fuad Hetta and Khalid Mohammed Rezk.
• Department of Anesthesia, Intensive Care and Pain Management, South Egypt Cancer Institute, Assuit University, Assuit, Egypt. Electronic address: diabhetta25@gmail.com.
• J Clin Anesth. 2016 Nov 1; 34: 91-7.

Study ObjectiveThe aim of this study was to evaluate the analgesic efficacy and safety of pectoralis-serratus interfascial plane block in comparison with thoracic paravertebral block for postmastectomy pain.DesignA prospective randomized controlled study.SettingTertiary center, university hospital.PatientsSixty-four adult women, American Society of Anesthesiologists physical status classes I, II, and III, scheduled for unilateral modified radical mastectomy with axillary evacuation.InterventionsPatients were randomized to receive either pectoralis-serratus interfascial plane block, PS group (n=32), or thoracic paravertebral block, PV group (n=32).MeasurementsTwenty-four-hour morphine consumption and the time to rescue analgesic were recorded. The pain intensity evaluated by visual analog scale (VAS) score at 0, 2, 4, 8, 16, and 24hours postoperatively was also recorded.Main ResultsThe median (interquartile range) postoperative 24-hour morphine consumption was significantly increased in PS group in comparison to PV group (PS vs PV), 20 mg (16-23 mg) vs 12 mg (10-14 mg) (P<.001). The median postoperative time to first analgesic request was significantly shorter in PS group compared to PV group (PS, 6 hours [5-7 hours], vs PV, 11 hours [9-13 hours]) (P<.001). The intensity of pain was low in both groups in VAS 0, 2, and 4hours postoperatively. However, there was significant reduction in VAS in PV group compared to PS group at 8, 16, and 24hours postoperatively.ConclusionsPectoralis-serratus interfascial plane block was safe and easy to perform and decreased intensity of postmastectomy pain, but it was inferior to thoracic paravertebral block.Copyright © 2016 Elsevier Inc. All rights reserved.

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