In use, {HEAD ~ a test sample} of blood is contacted with {TAIL ~ the matrix} of said test device and the light reflectance therefrom is measured as an indication of the quantitative amount of hemoglobin present in said sample 
is contacted with
In use , { HEAD ~ a test sample } of blood is contacted with { TAIL ~ the matrix } of said test device and the light reflectance therefrom is measured as an indication of the quantitative amount of hemoglobin present in said sample
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH