ESR Tube (4NC 0.109M)/( 4NC 0.129M)
MEDVAC® ESR Tubes are used for Westergren sedimentation rate determination. The tubes contain buffered sodium citrate solution as an anticoagulant. Citrate concentration of either 0.109M(3.2%) or 0.129M (3.8%) is available. The mixing ratio is 1 part citrate to 4 parts blood.
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