DaVita is starting a six-month trial of hemodiafiltration to selected patients in Colorado Springs, in the US. Reported here and on many other news sites too.
Hemodiafiltration differs from hemodialysis – the country's most common dialysis method – in that hemodiafiltration incorporates the standard hemodialysis process but adds an extra step designed to remove even larger toxin particles, thereby further cleansing a patient's blood. Hemodiafiltration is commonly practiced in Europe but until recently there was no FDA approved device for use in the U.S.
A very quick online search reveals references to Hemodiafiltration stretching back to 1998. One wonders why the US is only just getting its first ever trial of the technique.