The neuropathology of Alzheimer's disease (AD) is characterized by the widespread accumulation of neuritic plaques and neurofibrillary tangles composed of deposits of beta-amyloid peptide (Aβ) and abnormally phosphorylated tau protein (phospho-tau) respectively. Considerable effort has been expended to identify methods to retard the deposition of these proteins or to enhance their clearance. It is strikingly surprising that until now, very few researchers have attempted to remove these proteins using mechanical procedures. In this article, we start by showing the rationale of mechanical dilution of cerebrospinal fluid (CSF) as a therapeutic approach in AD. Then, we present models of implantable systems allowing mechanical dilution of CSF by means of CSF replacement and CSF filtration (liquorpheresis). We conclude that even though this approach seems simplistic, it is feasible and deserves exploration.