an extreme as a type of intense renal failure that develops in people who have serious health problems (such as for example sepsis) or with really low hypertension. Clients might need dialysis. Kidney function frequently improves if the fundamental illness is successfully addressed. Abbreviated ATN. Often times the term is employed synonymously because of the term acute renal failure (ARF). Usually, ATN would reference severe renal failure regarding the renal category where there has been injury to the filtering device for the renal itself (glomerulus and its particular connected tubular community).