Peristaltic pump and cassette

摘要

A peristaltic pump and cassette assembly comprises a pump having a rotatable roller head (12,14,16) adapted to engage and pinch a portion of a flexibly walled fluid channel (26) contained in the cassette (18) and to be in operative association therewith to push fluid contained therein along the channel. The roller head (14) is attached to a rotatable shaft (24) and has one or more rollers (16) with longitudinal axes, the longitudinal axes of the rollers being generally normal to the axis of the shaft. The flexibly walled fluid channel is formed by at least one molded channel (26) defined in a flexible sheet (20) attached to a planar exterior substrate (22) on the cassette (18).