I have been recently been tested (twice) for cryoglobulins. The first attempt
was "cancelled due to clerical error" so I looked it up out of curiousity. The
test procedures appear to be very specific...draw blood with warm syringe, keep
at 37 C until clotted...etc. So the second time I went in, I mentioned it to
the person drawing my blood. Well, three technicians later (I was a hard
stick) my blood was drawn next to an open window in a goosebump provoking
temperature with no precautions taken other than putting the collection tube in
warm water (after I was gone, I only saw the tube sitting in the freeeeeeezing
room). Do these sound like optimal conditions for an accurate test result? I
don't think so. The test did show "trace" cryoglobulins but it doesn't seem
like the doctor is giving it much thought. Any advice or comments out there?