Patent ID: 11951282
Assignee: BAXTER INTERNATIONAL INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. A method for controlling a pumping mechanism of an infusion pump including a tubular administrative set and a pumping mechanism, the pumping mechanism being constructed and arranged for releasably receiving the tubular administrative set and for exerting a pulsing force on the tubular administrative set, thus pressurizing a portion of the tubular administrative set for creating a flow of fluid from an outlet of the tubular administrative set, the method controlling the pumping mechanism to pump fluid through the tubular administrative set at a desired flow rate over a specified duration, a controller being connected to said pumping mechanism and configured for operating said pumping mechanism, the method comprising:
using the controller to:
determine a first pulse frequency to obtain a target fluid volume of fluid infused over a portion of the specified duration and the desired flow rate;
output a control signal to said pumping mechanism for operating said pumping mechanism at said first pulse frequency; and
adjust the first pulse frequency to a second pulse frequency, said second pulse frequency being different from said first pulse frequency,
wherein said adjusting the first pulse frequency comprises adjusting the first pulse frequency at predetermined volume points based on a comparison of historical data of administrative set flow rate accuracy in terms of % error with an intended volume of fluid infused, such that said second pulse frequency compensates for a degradation of a material of the administrative set.