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Specific Gravity W/V Conversions

n.peters
in Donor Services and Donor Recruitment

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comment_13529

Does the specific gravity for a component change if it is washed? The Tech Manual state that the specific gravity of RBCs is 1.100. In my computer system the SG has been entered for WLRBCs as 1.060 and I can not for the life of me find a reference for that. Would the density change based on the crit? If anybody could shed some light on this I would really appreciate it. Thank you!

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comment_19028

Out of my league, but I would imagine that the specific gravity would change if the red cells are suspended in saline rather than donor plasma. And surely the specific gravity would increase if the hematocrit increases. As to where to find a reference for the formula/figures you mention, I have no idea.

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