An apparatus for maintaining cerebral circulation in a patient above a baseline flow rate during treatment, the apparatus comprising: (a) a plurality of compression cuffs (10, 11, 12, 13), each cuff (10, 11, 12, 13) being inflatable and deflatable and each cuff (10, 11, 12, 13) being positionable, in use, around a respective limb (14, 15, 16, 17) of a patient and inflatable to exert a pressure upon the limb (14, 15, 16, 17) sufficient to reduce limb (14, 15, 16, 17) blood flow below the point at which the cuff (10, 11, 12, 13) is positioned; (b) a control module to which the cuffs (10, 11, 12, 13) are attachable, the control module comprising a pump with which each cuff (10, 11, 12, 13) is in fluid communication and a valve arrangement associated with each cuff (10, 11, 12, 13) to control flow of fluid to and from each cuff (10, 11, 12, 13), the control module being adapted to inflate and deflate each cuff (10, 11, 12, 13) independently of the others; and (c) a cerebral blood flow monitoring apparatus adapted to detect the baseline flow rate in the cerebral circulation and to repeatedly measure or continuously monitor flow rate in the cerebral circulation during treatment of the patient, wherein the control module is in operative communication with the cerebral blood flow monitoring apparatus, such that the control module is adapted to inflate one or more cuffs (10, 11, 12, 13) to reduce the respective limb (14, 15, 16, 17) blood flow below the point around the respective limb (14, 15, 16, 17) at which the inflated cuff (10, 11, 12, 13) or each inflated cuff (10, 11, 12, 13) is positioned and maintain inflation of the or each cuff (10, 11, 12, 13) for a predetermined period, to thereby elevate the cerebral circulation from the baseline flow rate to an increased flow rate, and thereafter control inflation of the plurality of cuffs (10, 11, 12, 13) to maintain the measured or monitored cerebral flow rate above the baseline cerebral flow rate during treatment, by reducing limb (14, 15, 16, 17) blood flow and augmenting cerebral circulation; characterised in that the control module further comprises an imaging device adapted to determine where an occlusion is present in the cerebral circulation. (a) a plurality of compression cuffs (10, 11, 12, 13), each cuff (10, 11, 12, 13) being inflatable and deflatable and each cuff (10, 11, 12, 13) being positionable, in use, around a respective limb (14, 15, 16, 17) of a patient and inflatable to exert a pressure upon the limb (14, 15, 16, 17) sufficient to reduce limb (14, 15, 16, 17) blood flow below the point at which the cuff (10, 11, 12, 13) is positioned; (b) a control module to which the cuffs (10, 11, 12, 13) are attachable, the control module comprising a pump with which each cuff (10, 11, 12, 13) is in fluid communication and a valve arrangement associated with each cuff (10, 11, 12, 13) to control flow of fluid to and from each cuff (10, 11, 12, 13), the control module being adapted to inflate and deflate each cuff (10, 11, 12, 13) independently of the others; and (c) a cerebral blood flow monitoring apparatus adapted to detect the baseline flow rate in the cerebral circulation and to repeatedly measure or continuously monitor flow rate in the cerebral circulation during treatment of the patient,