Chemical and microbial quality of water in different pretreatment stages and input water to dialysis devices: a case study on comparison with AAMI Standard, Iran

Chemical and biological quality of input water to the dialysis devices is very important for hemodialysis patients. The aim of this study was evaluating water entering to the dialysis devices and comparison international standard. In this study five dialysis devices were randomly selected from hemodialysis wards of Kermanshah’s Imam Reza hospital and the most important chemical parameters (calcium, magnesium, sodium, potassium, nitrate, sulfate, fluoride, and chlorate) and a microbial parameter (bacteria) of water entering the dialysis devices was measured during one month. Two reverse osmosis (RO) systems were located before each dialysis device as pretreatment. The samples were taken from input and of RO systems. The sampling was conducted twice a week and 120 samples (40 samples from input of first RO system or tap water, 40 samples from output of first RO or input of second RO system, and 40 sample from output of second RO system or input of dialysis device) were taken totally. The results show that all measured chemical and microbial parameters (except calcium with no verification test) in water entering all dialysis devices were consistent with AAMI standards. Also evaluated parameters 1053 (except magnesium with no verification test) in all drinking water samples were consistent with drinking water standard. Based on the results, it could be said that the proper performance of RO devices, purified water conservation storage and transportation has been caused the proper quality of water entering dialysis device and its consistent to both AAMI and endotoxin standards.