Feeding set with cassette and related methods therefor

A pump set for use with a pumping apparatus having a rotor with a plurality of rollers mounted on the rotor rotatable about an axis of rotation, the pump set comprising:

• a cassette body having a top, a bottom, sides, and a center defined by a point midway between the top and the bottom and midway between the sides, the cassette body comprising a flexible stator with a fixed end secured to the cassette body at a connection, a second end opposite the fixed end, a middle portion including a reaction surface and a second surface opposite the reaction surface, the middle portion defined between the fixed end and the second end, the second end being free from any structure of the cassette body aside from the middle portion, the flexible stator having an arcuate shape curving inwards relative to the center of the cassette body;
• and
• a deformable tube secured to the cassette body, at least a portion of the deformable tube configured to be disposed against the reaction surface, the flexible stator being arranged in the cassette body to permit the flexible stator to float in the cassette body as the plurality of rollers traverse the deformable tube over a length of the reaction surface of the flexible stator, the flexible stator being constructed to pivot about the connection to the cassette body and flatten out upon engagement of the deformable tube by the plurality of rollers of the rotor during rotation of the rotor to deliver fluid through the deformable tube,
• wherein a section of the flexible stator extends along a length of the flexible stator, a width of the section extending partially across the flexible stator, and a thickness of the section extending from the reaction surface to the second surface, the thickness being constant along an entire length of the section.

A pump set for use with a pumping apparatus having a rotor with at least one roller mounted on the rotor rotatable about an axis of rotation, the pump set comprising:

• a cassette body including a flexible stator with a fixed end secured to the cassette body at a connection, a second end opposite the fixed end, a middle portion including a reaction surface and a second surface opposite the reaction surface, the middle portion defined between the fixed end and the second end, the second end being free from any structure of the cassette body aside from the middle portion, the flexible stator having an arcuate shape curving relative to a center of the cassette body;
• and
• a deformable tube secured to the cassette body, at least a portion of the deformable tube configured to be disposed against the reaction surface, the flexible stator being arranged in the cassette body to permit the flexible stator to float in the cassette body as the at least one roller traverses the deformable tube over a length of the reaction surface of the flexible stator, the flexible stator constructed to pivot about the connection to the cassette body and flatten out upon engagement of the deformable tube by the at least one roller during rotation of the rotor to deliver fluid through the deformable tube,
• wherein the cassette body includes a wall opposing the reaction surface of the flexible stator such that the arcuate wall and the reaction surface form a cavity to receive the rotor therein, the resiliently deformable tube passing through the cavity between the arcuate wall and the flexible stator.

A pump set for use with a pumping apparatus, the pump set comprising:

• a cassette including a flexible stator with a fixed end cantilevered to the cassette, a second end opposite the fixed end, and an arcuate portion along a length of the stator between the fixed end and the second end;
• and
• a resiliently deformable tube coupled to the cassette, at least a portion of the deformable tube configured to contact the arcuate portion;
• wherein the flexible stator is configured to pivot about the fixed end and the arcuate portion is configured to displace upon engagement by a rotor of the pumping apparatus;
• and
• wherein the flexible stator includes a constant thickness between the fixed end and the second end.