Biomedical engineering

Medical devices, pacemakers, MRI physics, and osseointegration

What is biomedical engineering?

Biomedical engineering applies engineering principles to medicine and biology, designing devices, systems, and technologies used to diagnose, monitor, and treat medical conditions — bridging the anatomy and physiology covered in the Biology section with the engineering disciplines covered elsewhere in this branch.

Medical devices

Biomedical engineers design a huge range of medical devices, from simple tools like thermometers and stethoscopes to highly complex machines like MRI scanners and pacemakers. Each device must be engineered not only to work correctly, but to work safely and reliably on or inside a living human body, which introduces demands well beyond typical industrial engineering.

Prosthetics and implants

Prosthetic limbs and implanted devices (like artificial joints, heart valves, and pacemakers) must be designed to function reliably inside or as part of the human body for extended periods, sometimes decades. This requires materials that are biocompatible (not triggering harmful reactions from the body's immune system) and durable enough to withstand constant, repeated mechanical stress without failing.

Medical imaging

Medical imaging technologies, including X-ray, ultrasound, MRI, and CT scanning, let doctors see inside the human body without surgery, each relying on different underlying physics (covered in the Physics section) to generate a usable image. Biomedical engineers design and refine the equipment that generates and processes these images, working to make them clearer, safer, and faster to obtain.

Why biomedical engineering matters

Biomedical engineering has directly enabled some of modern medicine's most significant advances — from routine, life-saving pacemakers and artificial joints to sophisticated diagnostic imaging — continually improving both the quality and safety of medical care available to patients.