Patent ID: 9498583
Filing Date: 2016-11-22
CPC Classification: A61M,G16H

Claim Text:
1. An infusion system comprising: a pump; a fluid delivery line connected to the pump for delivering fluid; at least one sensor connected to the fluid delivery line for emitting and receiving signals to detect whether there is air in the fluid delivery line; a processor in electronic communication with the pump and the at least one sensor; and a memory in electronic communication with the processor, wherein the memory comprises programming code for execution by the processor, and the programming code is configured to determine a partial/percentage volume of the air within an observed volume of the fluid delivery line, by analyzing a plurality of analog-to-digital count readings taken by the at least one sensor to determine in what total number of the plurality of the analog-to-digital count readings a froth exceeded an air-fluid threshold, and by multiplying the total number of the plurality of the analog-to-digital count readings in which the froth exceeded the air-fluid threshold by a calibrated volume per analog-to-digital count reading to determine the partial/percentage volume within the observed volume that the froth exceeded the air-fluid threshold, and is configured to generate an alarm if the partial/percentage volume exceeds an alarm limit.