Researchers at Johns Hopkins University have developed microscopic robots designed to deliver medication directly to the heart, potentially reducing the need for invasive open-heart surgeries. These microrobots, approximately the size of a pencil tip, have so far been tested on pig hearts and through computer simulations.

The device operates by being injected into the skin, where it then travels to the heart. Once there, a “needle module” attaches to the targeted damaged or infected tissue. Following this, a “drug module” connects to the needle to administer antibiotics or other medications. The movement and positioning of the microrobots are controlled externally using magnetic fields.

Dr. Axel Krieger, the lead inventor, described the process as minimally invasive, noting that the microrobot can be inserted with only a pinprick and does not require surgical intervention. The team envisions the technology initially being used to treat endocarditis, a serious heart infection that affects around 1,500 people annually in the United Kingdom. The approach could also be extended to deliver targeted treatment for cancerous tumors.

Professor Anuruddha Bhattacharjee highlighted that conventional intravenous drug therapy for conditions like endocarditis typically requires four to six weeks of treatment. In contrast, the microrobotic system could potentially reduce the procedure time to as little as ten minutes to an hour.

While the technology remains in early stages and has yet to be tested in humans, it represents a promising advance in targeted cardiac therapies, offering the possibility of faster, less risky treatment options for heart infections and possibly other diseases.