Externally Powered Medical Devices Mean No More Batteries
Flashlights and mobile phones both operate by battery with very little trouble, but the same type of battery power isn’t always feasible when it comes to medical equipment such as probes or implants. Fortunately, technical engineers and medical researchers have come up with a process that allows these systems to gain power without an external power source or cord.
Over the past fifty years, pacemakers have been used to set and maintain the rhythm of people’s hearts. During that same period, microelectronic implants have made dramatic advancements, becoming even smaller and more sophisticated than anyone dreamed possible. This trend has led to smaller and more intelligent systems that can be used to diagnose and treat illnesses; so much so that medical equipment manufacturers have created thousands of newer and smarter devices.
As an example of the movement to miniaturized healthcare, implantable sensors are now being used to measure blood pressure, glucose levels and oxygenation of tumors; all while using telemetry to transmit patient information. At the same time, infusion pumps and automated dosage systems are delivering a more targeted release of medication into the body; a practice that has been known to reduce side effects.
Medical equipment developers are constantly looking for new solutions to common medical problems that allow for more accurate and timely intervention. Far more technically advanced than the equipment doctors used just a few years ago, these solutions include signal processing units, actuators, probes and electronic controls that have long been used with a power supply. Using them within the human body has always required the use of wave-based or inductive systems, but these systems have inherent limitations with position, range and movement. Alternatively, the use of wireless power transmission from a portable transmitter to a mobile generator unit allows for a more reliable power source, which can be easily worn in a belt.
Developed by the Fraunhofer Institute for Ceramic Technologies, this small cylindrical device provides an impressive 100 milliwatts of electric current and has a range of approximately 50 centimeters. Wearing a power supply on a belt, it’s possible to operate medication dosing systems, supply power to internal implants and capture images from endoscopic capsules as the migrate through the intestinal tract.






