The Oregon University of Health and Science took over Dr. Richard Wampler's research to refine his permanent artificial heart design. This is the only mechanical heart that has received permission for use in the United States, even if only for the period of waiting for a donor organ.
A man-made heart looks like an engine, and it is in its essence. This is a set of cylinders made of titanium alloy, inside which a pair of pistons moves on hydrodynamic bearings. The movement is as simple as possible, back and forth, with a given frequency, during breaks, the tubes are closed by valves. There is nothing to break, get stuck or twist, the probability of device failure is minimized to the limit.
The artificial heart simulates the work of the two lower chambers of a real organ and, instead of constant blood flow, provides a double cycle of blood circulation, first through the lungs, then through the patient's body. This should reduce the stress on blood vessels, reduce the risk of stroke and internal bleeding.
The energy source for the heart is still external, a battery for wearing on a belt, combined with a control panel. With the advent of new batteries, there is a chance to make it more compact and implant directly into the human body. Scientists have successfully conducted experiments on cows and sheep and are now designing a model that can be installed by humans.