A 3D-Printed Hydrogel Implant Could Treat High Blood Pressure Without Medication

High blood pressure is one of the leading causes of cardiovascular disease worldwide. For many patients, standard drug treatments are not sufficient. Researchers at Penn State University may have found a potential solution in a small bioelectric implant made using 3D printing.

The device, called CaroFlex, is manufactured using 3D printing with hydrogel, a soft, flexible material similar to gelatin. This choice is not incidental. Unlike traditional bioelectrodes made from rigid metals and plastics, CaroFlex mechanically adapts to living tissue and adheres to it without the need for sutures, thanks to a built-in, non-toxic adhesive layer. Eliminating sutures addresses one of the key limitations of conventional implants: the gradual damage to arterial tissue caused by the natural expansion and contraction of blood vessels.

According to Tao Zhou, assistant professor of Materials Science and Engineering at Penn State and the study’s lead author, the implant acts on the baroreceptor reflex—a natural mechanism in the body that regulates blood pressure through specialized nerve endings located in the carotid sinus. The device is implanted in this area and emits low-frequency electrical signals that stimulate these receptors, thereby modulating the autonomic nervous system’s response without the use of medication.