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8. When the blood drop is large enough, fill the microcuvette in one continuous process.
Do NOT refill!
NOTE: Make sure that the microcuvette is filled from the tip, forming an angle (about
45 °) with the blood drop.
9. Wipe off excess blood from the outside of the microcuvette with a clean, lint-free wipe.
Do not touch the open end of the microcuvette.
10. Look for air bubbles in the filled microcuvette. If present, discard the microcuvette and
fill a new microcuvette from a new drop of blood.
NOTE: Make sure that the microcuvette is lled correctly as an improper lling angle might
cause air bubbles.
NOTE: If a second sample is to be taken, it is important that this is done after the measure-
ment of the rst sample is completed. Wipe away the remains of the drop of blood and ll
the second microcuvette from a new drop of blood as per steps 8–10 above.
NOTE: HemoCue WBC DIFF is not validated for heel stick.
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