A peristaltic pump includes occluding surfaces rotatably supported by a support, an occlusion having an occlusion surface and a drive system configured to rotate occluding surfaces about a common axis. At least one of the support and the occlusion is movable towards the other of the support and the occlusion. The drive system is coupled to at least one of the support and the occlusion so as to move at least one of the support and the first occlusion.