Patent ID: 8795225

Claim:
A system for detecting fluid in a feeding tube, said system comprising: a light source transmitting an infrared light through the feeding tube and any fluid therein; an infrared intensity sensor sensing an intensity of the infrared light transmitted through the feeding tube and through any fluid therein and generating an output signal having a variable frequency, wherein the frequency of the output signal is a function of the sensed intensity of the infrared light transmitted through the feeding tube; and a processor receiving the generated output signal and determining the frequency of the generated output signal, wherein the processor is configured to determine whether fluid is in the feeding tube by comparing the determined frequency of the generated output signal to one or more threshold frequency ranges stored in a memory, and wherein said processor is configured to determine whether the feeding tube has no fluid, a clear fluid, or a non-clear fluid as a function of the determined frequency as compared to the threshold frequency ranges.