초록 ▼

An infusion pump system is described containing a valved cassette which is used as a pumping chamber for conducting fluid from an upstream portion to a downstream portion of the system. The removable cassette contains magnetically biased valves at both ends. Externally mounted magnets bias the valve

An infusion pump system is described containing a valved cassette which is used as a pumping chamber for conducting fluid from an upstream portion to a downstream portion of the system. The removable cassette contains magnetically biased valves at both ends. Externally mounted magnets bias the valves within the cassette to provide an opening of the inlet valve and closing of the output valve during the fill cycle and closing of the inlet valve and opening of the outlet valve during the pump cycle. Free flow of infusion fluid is allowed when the valved cassette is removed from the pump mounting member which houses the actuating magnets and the reciprocating actuator for the pumping chamber.

대표청구항 ▼

A valved pumping chamber for use in an infusion delivery pump system including first and second magnetic means and a pump actuating means including a reciprocal operating member, said pumping chamber operating between an upstream portion and a downstream portion of the infusion delivery system compr

A valved pumping chamber for use in an infusion delivery pump system including first and second magnetic means and a pump actuating means including a reciprocal operating member, said pumping chamber operating between an upstream portion and a downstream portion of the infusion delivery system comprising: an inlet port; an inlet fluid passage means interconnecting with said pumping chamber; an inlet valve seat having a bore in said inlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said inlet valve seat under the magnetomotive force of said magnetic means; means for providing substantially constant and continuous magnetic force located outside of said inlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said inlet valve seat; a pumping chamber defining a cavity and flexible means adapted to be engaged by said reciprocal operating member to change the internal volume of said pumping chamber; an outlet port; an outlet fluid passage means interconnecting with said pumping chamber; an outlet valve seat having a central bore disposed in said outlet fluid passage means; magnetically permeable flow restricting means constructed and arranged to be biased against said outlet valve seat under the magnetomotive force of said second magnetic means; and means for providing a substantially constant and continuous magnetic force located outside of said outlet fluid passage means which maintain said magnetically permeable flow restricting means in proximity to said outlet valve seat.