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The extent of migration of plasticizer from haemodialysis lines into saline and plasma has been examined and a number of different types of tubing have been compared. A model system designed to simulate in vivo haemodialysis was evolved. The method uses a continuous cyclohexane extraction in order to mimic uptake of plasticizer by body tissues. Although not an ideal system, the results obtained are indicative of the extent to which the plasticizers are leached.

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