why do hospitals need purified water

Today maybe more than ever the importance or scientific research is apparent. Many scientists around the world are working tirelessly in both hospitals and other scientific laboratories to help us fight the Covid-19 virus. Their research is paving the way to understand the pathogenesis of this virus so we can better diagnose patients and hopefully produce a vaccine. Here at Avidity Science, we have specialists who understand the importance of purified water for the different scientific applications performed in laboratories.

Hospital decontamination centres rely on a consistent supply of high quality purified water to wash, rinse and sterilise reusable surgical instruments and for the reprocessing of flexible endoscopes. Pure water is also used to feed clinical analysers in blood science laboratories.

To minimise the threat of hospital acquired infections (HAI), hospitals rely on sterile services departments to ensure that reusable surgical instruments are clean and sterilised to consistently high standards to prevent bacterial, protein and endotoxin transfer between patients. RO water is used for the high temperature final rinse in washer disinfectors and to generate clean steam for autoclaves. In addition to infection control, the quality of water used in the decontamination and sterilisation process will affect how stainless steel surgical instruments age; poor water quality will result in the build-up of stains, corrosion and scale. Pure water also prevents corrosion in the washers and autoclaves.

RO water is typically used for all stages of endoscope decontamination in automated endoscope reprocessors (AERs). This ensures a consistent efficacy of cleaning chemicals and a low endotoxin and micro-organism total viable count (TVC) challenge during the final rinse cycle. This avoids a recontamination risk to the next patient. The Department of Health specify that a continuous supply of water with the correct purity is essential to the correct functioning of all AERs. Chemical and microbial quality affects how well a system functions and the final decontamination of instruments. The quality of water for instrument and endoscope decontamination is covered by the European standard EN15883.

Type 2 water is essential for accurate and reproducible diagnostic testing using clinical analysers where it is used as a diluent, for water baths and for washing reaction cuvettes. Large, multiple analyser systems on a recirculating distribution loop can use over 200 litres of water per hour. High volume clinical diagnostics methods require water feeds that comply with Clinical Laboratory Standards Institute (CLSI) guidelines for Clinical Laboratory Reagent Water (CLRW) standards to ensure compliant sensitivity in immunoassay.