Medical device regulators are organizations or government bodies responsible for ensuring that medical devices are safe and effective for public use. They evaluate the design, manufacturing, and performance of devices, which can range from simple items like bandages to complex machines like MRI scanners. These regulators set standards and guidelines that manufacturers must follow before their products can be sold. In many countries, such as the U.S. Food and Drug Administration (FDA) in the United States or the European Medicines Agency (EMA) in Europe, these regulators conduct thorough reviews and inspections. They also monitor devices after they are on the market to ensure ongoing safety and effectiveness, addressing any issues that may arise.