Magnetic Bearings for Mechanical Cardiac Assist Devices
The promise of integrating magnetic bearing systems into mechanical circulatory assist devices has been acknowledged for some time and includes patents that have since expired. Several decades later, many of the devices in use incorporate some aspects of magnetic bearings and a few fully magnetically suspended pumps exist, but they are still far from ubiquitous in clinical use. The most commonly implanted pumps in 2015 remain mechanically suspended rotary type devices, such as the HeartMate II. This is likely a reflection of both increased size and decreased reliability that accompany magnetic bearing system, both resulting from additional components described in...