10/15/2026
Each year, about 50,000 people in the U.S. develop endocarditis, an infection of the heart's tissue. The standard treatment is weeks of IV antibiotics, which often fail because the drugs are too diluted by the time they reach the heart. That can leave patients facing higher, potentially toxic doses or risky open-heart surgery.
Researchers at the Whiting School of Engineering at Johns Hopkins University have developed magnetic robots, each about the size of a pencil tip, that could deliver medicine directly to the site of infection. The robots work in pairs. One anchors to the heart tissue as a docking station, and the other brings the drug to it. An external electromagnetic system that works like an MRI steers both of them wirelessly, so they need no batteries or motors.
In tests on heart models and pig heart tissue, the robots moved smoothly and autonomously, even against simulated blood flow. Next, the team plans to test them in models that beat like a real heart. The approach could also be used against cancer where it's spreading. https://bit.ly/4zQyZUf