Plural inlet pumping cassette with integral manifold

Abstract

An integral disposable manifold and pump cassette, through which fluid is pumped from inlet tubes, forms a single disposable cassette which may be inserted into a single pump housing. The integral disposable manifold and pump cassette includes first and second sheets of flexible plastic material. Sealed inlet channels are formed between the first and second sheets of flexible plastic material, with the sealed inlet channels being connectable to inlet tubes for fluid passage therethrough. The sealed inlet channels can be individually pinched off to prevent fluid passage therethrough. A sealed main channel, which is connected between the inlet channels and an outlet tube is formed between the first and second sheets of flexible plastic material. The sealed main channel includes a pumping chamber which is also formed between the first and second sheets of flexible plastic material. A flange, also formed between the first and second sheets of flexible plastic material, generally surrounds the inlet channels and the main channel. The flange facilitates the insertion and removable of the disposable manifold and pump cassette from the single pump housing. A first flexible diaphragm, extending outward from the flange, is formed in the first sheet of flexible plastic material. The first flexible diaphragm forms a portion of the pumping chamber.