Sharp Kabushiki Kaisha Corporation

Baxter International Inc.

Cynthia A Bennett

Masafumi Kawahara

Grace M Esche

Thomas Callaghan

In an infusion apparatus for use in the medical field, a peristaltic pump mechanism pumps an infusion fluid including medication through an administration tube toward a patient. A clock powered independent of the apparatus counts a predetermined unit time. A CPU accumulates data representing an incremental unit of fluid of the infusion fluid delivered by the pump mechanism to measure an accumulated infusion fluid volume each time the clock counts the unit time. Data as to the current accumulated infusion fluid volume is stored in a second storage section of a RAM. Each time the clock counts the unit time, data representing the accumulated infusion fluid volume stored in the second storage section is written to a ring buffer in the RAM, so that the ring buffer stores data representing a plurality of accumulated infusion fluid volumes in one-to-one correspondence with a plurality of times at which the plurality of accumulated infusion fluid volumes were measured. The CPU accesses the buffer ring at a key-inputted request by an operator to display any desired accumulated data of the infusion fluid volume on a display unit.

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Park Ridge, IL, United States of America

Cynthia A Bennett