Clinical Research Directory

RISS vs ESP Block for Postoperative Analgesia After Mastectomy

Breast cancer is one of the most common malignancies and represents an important public health problem. Modified radical mastectomy (MRM) is frequently associated with acute postoperative pain resulting from a combination of somatic and neuropathic mechanisms. Inadequately controlled postoperative pain may impair recovery, delay mobilization, increase opioid consumption, and negatively affect patient satisfaction and quality of life. Therefore, effective multimodal analgesia is an important component of perioperative care in patients undergoing breast surgery. Ultrasound-guided regional anesthesia techniques have gained increasing attention because they can provide effective postoperative analgesia while reducing opioid requirements and opioid-related adverse effects. The erector spinae plane block (ESPB) and rhomboid intercostal and subserratus plane (RISS) block are ultrasound-guided fascial plane techniques that may provide analgesia for thoracic and breast surgery. The aim of this randomized controlled study is to compare the postoperative analgesic efficacy of ultrasound-guided ESPB and RISS block in patients undergoing modified radical mastectomy and sentinel lymph node excision. The primary objective is to compare postoperative opioid consumption between the two techniques. Secondary outcomes include postoperative pain scores, analgesic requirements, and patient satisfaction. The hypothesis of the study is that ESPB and RISS block are comparable in terms of postoperative analgesic efficacy and that neither technique is superior to the other.