We also notice that, but you can avoid that by letting
the blood specimens to completely clot before you spin
it.
you may see this problem with patients on heparin
therapy, in this case you can collect the specimens in
Lithium Heparin tube (it depends on what you
measuring) or just give it more time to clot.
You can use plastic Pasteur pipette to dissolve the
clot and remove the last small remaining fibrin to
save more serum for your assay.
Thanks
Mohamed
USA
--- "Dr. Clara Henig" <[log in to unmask]>
wrote: > Dear colleagues
>
> We have noticed lately that after centrifugation of
> our gel tubes (BD, SST1)
> most of the serum phase becomes solid with very
> little liquid in its upper
> part(no movement in the serum phase after inverting
> the tubes).
> Can anyone tells us:
> 1. Why does it happen?
> 2. What should we do? Today, we take out the huge
> "clot" (sometimes we get
> very little amount of serum)and analyze it on our
> instruments.
> 3. Are the results reliable after taking out the
> "clot"?
> 4. In some of the specimens another clot is
> recreated again after taking
> the clot out. What can be the explanation for that?
>
> Thank you for your help
>
> Dr. Clara Henig
> Maccabi Health Care
> The north regional LAB
> Israel
>
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