This is a descriptive and retrospective stadistical study too realize in Pablo Artuto Suares Hospital in Quito Ecuador. Make the ingestion withe phosphorus prevalence in the period to 01-01-1996 to 31-12-1996. Complete 39 patients, men 19, women 20, year average 20.35, time ingestion average 11.10 days, morbility 84.6 por ciento and mortality 15.37 por ciento.