ASPIRATION FLOW METER AND CONTROL

摘要

An ophthalmic surgical pump system (32) includes a collection reservoir (54) and a venturi pump (56) for creating a vacuum level for aspirating fluid and tissue from a surgical site to the collection reservoir (54). Aspiration tubing (50) connects to each of a surgical handpiece (46) and the collection reservoir (54). A flow meter (34) is electrically connected to either the aspiration tube (50) or the collection reservoir (54). Control circuitry (38) is connected to the flow meter (34) and to the venturi pump (56) for varying a vacuum level of the pump (56) to maintain a desired flow rate of the fluid and tissue being aspirated from the surgical site.