Patent ID: 8320983

Claim:
An implantable article comprising: first and second parts; each of the first and second parts including a respective container and being operable as an optical cavity with a respective optical spectrum characteristic that can be affected by presence of spectrum-affecting objects in the container; the respective container having a respective set of one or more bounding regions through which objects in bodily fluid can transfer between the container's interior and exterior when the article is implanted in a body; and first and second fluidic components that control transfer of objects in bodily fluid through the respective bounding regions of the first and second parts, respectively; the first fluidic component permitting transfer of a first set of the spectrum-affecting objects into the first container at a more rapid rate than spectrum-affecting objects not in the first set; the second fluidic component permitting transfer of a second set of the spectrum-affecting objects into the second container at a more rapid rate than spectrum-affecting objects not in the second set; the first and second sets of spectrum-affecting objects both including a shared subset; the first set including a non-shared subset that the second set does not include; objects that are instances of an analyte type being predominantly in the non-shared subset.