A medical device is any instrument, machine, or tool used to diagnose, monitor, or treat health conditions. These devices can range from simple items like bandages and thermometers to complex machines like MRI scanners and pacemakers. They play a crucial role in healthcare by helping doctors and patients manage illnesses and improve quality of life. Medical devices are regulated by organizations such as the Food and Drug Administration (FDA) to ensure their safety and effectiveness. Innovations in technology have led to the development of advanced devices, including wearable health monitors and robotic surgical systems, which enhance patient care and outcomes.