A new, small robotic camera designed to be swallowed for use in medical examinations was recently demonstrated at a conference in Canada. The device called PillBot can be guided through a body remotely, meaning electronically from outside. Its creators hope the device will replace traditional endoscopies. An endoscopy is when a camera attached to a wire is directed down the throat and into a sleeping patient’s stomach. The company Endiatx based in Hayward, California, developed the device. The research hospital, Mayo Clinic, in Rochester, Minnesota, is a partner in the project. The PillBot is designed to be the first motorized endoscopic camera. Here is how developers say it works: A patient does not eat for one day, then swallows the PillBot with lots of water. The PillBot acts like a small submarine controlled by a wireless remote control. When the exam is complete, the body will expel the PillBot in the same way it expels other solid waste. Dr. Vivek Kumbhari is co-founder of the company. He is professor of medicine and chairman of gastroenterology and hepatology at the Mayo Clinic. It is the latest step toward his larger goal of making complex medicine more accessible.