Abstract
An assessment of the environmental pollution from the use of formaldehyde solutions in dialysis units indicated that spillages from manual washout systems and fluids exposed during semi-automated washouts were the greatest source of contamination. Inadequate air exchange also allowed accumulation of atmospheric formaldehyde to rise above the threshold limit values (TLV) ceiling of 2 ppm and to reach 25 ppm. Improvements in the air extraction systems, the introduction of closed drainage and staff guidance resulted in safe working conditions. Additionally a planned monitoring programme and an ongoing staff training scheme are recommended wherever formaldehyde is used in appreciable quantities.
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