This multicenter, scenario-based cross-sectional study aims to examine the effect of operating room nurses' knowledge of medical device-related pressure injuries on their clinical decision-making skills. The study will be conducted with approximately 165 operating room nurses working in three different hospitals in Gaziantep, Türkiye. Data will be collected using a descriptive information form, a validated medical device-related pressure injury knowledge scale, and a scenario-based clinical decision-making assessment form. The study will evaluate the relationship between nurses' knowledge levels and their clinical decision-making performance, as well as identify factors influencing these outcomes. The findings are expected to contribute to improving patient safety, enhancing nursing education, and supporting evidence-based clinical decision-making in perioperative care.