Perfusion chamber

A bath for use in the study of in vitro maintained human or animal tissue, comprising a body having a bath cavity, means to allow fluid entry into said bath cavity, and means to allow fluid exit from said bath cavity, wherein the means to allow fluid exit from said bath cavity comprises a spillway formed into a wall of the bath, said spillway being formed so as to have a surface sloping downwardly from an upper edge thereof serving to define the maximum level of fluid in said bath cavity, and said spillway being provided with means to regulate the flow from the bath over the spillway, said means comprising a choke formed into an elongated wedge having a lower surface complementary to the surface of said spillway, and means for maintaining said lower surface in a predetermined contiguous relationship with the sloping surface of said spillway.

A bath for use in the study of in vitro maintained human or animal tissue, comprising a body having a bath cavity, means to allow fluid entry into said bath cavity, and means to allow fluid exit from said bath cavity, wherein the means to allow fluid exit from said bath cavity comprises a spillway formed into a wall of the bath, said spillway being formed so as to slope downwardly from an upper edge thereof adapted to define the maximum level of fluid in said bath cavity, and said spillway being provided with means to regulate the fluid flow from the bath cavity, said means to regulate comprising a choke in the form of an elongated wedge, adapted to have its lower surface maintained in a predetermined contiguous relationship with said spillway, wherein said choke has a nose and is pivotally mounted on a mounting therefore for rotation about an axis substantially parallel to and adjacent to the upper edge of the spillway, said mounting being arranged such that a gap of constant dimension will be maintained between said nose and said upper edge at any particular rotational position of the choke.