The goal of this clinical trial is to evaluate the effects of the Rhomboid Intercostal Block (RIB) on postoperative chronic pain prevalence at 3 months (primary outcome) and on acute pain control, total opioid consumption, and the incidence of opioid-related side effects within the first 24 hours (secondary outcomes) in patients undergoing elective mastectomy surgery. The main questions it aims to answer are: Does the application of RIB reduce the prevalence of chronic pain at 3 months postoperatively? Does RIB improve acute pain control and reduce opioid consumption and related side effects in the first 24 hours postoperatively? Researchers will compare patients who receive RIB under general anesthesia to those who do not receive the block to determine its effectiveness in reducing chronic pain prevalence, acute pain scores, and opioid-related outcomes.
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Chronic pain incidence at postoperative third month
Timeframe: from enrollment (surgery day) to the end of postoperative third month.