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	Haemofiltration Haemofiltration: This involves removal of plasma water and its dissolved constituents (e.g. K⁺, Na⁺, urea and PO₄^3-) by convective flow across a high-flux semi-permeable membrane, and replacing it with a solution of the desired biochemical composition Can be used for both acute and chronic renal failure High volumes need to be exchanged in order to achieve adequate small molecule removal: CRF - 22L exchange 3 times a week ARF – 1L per hour Expensive and not often used in patients with ESRF May be cost-effective in treating ARF
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