$Unique_ID{BRK00886}
$Pretitle{Special Procedures and Laboratory Tests}
$Title{What is a Sed Rate?}
$Subject{sed rate erythrocyte sedimentation}
$Volume{P-7}
$Log{}

Copyright (c) 1991   Tribune Media Services, Inc.


What is a Sed Rate?


------------------------------------------------------------------------------

QUESTION:  When I spoke to my doctor about some recent blood tests, he told me
that my "sed" rate was just a bit high.  What is a sed rate, and what am I
going to have to do to make it lower?  I am very concerned.

------------------------------------------------------------------------------

ANSWER:  The term "sed rate" is an abbreviation of the name of a blood test
involving red cells called the "erythrocyte sedimentation rate" (also known
as ESR).  If a sample of blood is allowed to stand in a test tube, the red
blood cells will gradually sink to the bottom of the tube, creating a clear
layer of yellowish plasma at the top.  Depending upon the method used to
perform the test, this clear layer will measure from 0-20 mm/hour in women.
When the cells descend at a faster rate, producing a larger clear layer, the
"sed" rate is higher.  It is a sign that there is an inflammation going on
somewhere in the body, and may require additional tests to locate just where
that process is going on.  Usually when the situation is cared for and
corrected, the sed rate returns to normal.

----------------

The material contained here is "FOR INFORMATION ONLY" and should not replace 
the counsel and advice of your personal physician.  Promptly consulting your 
doctor is the best path to a quick and successful resolution of any medical 
problem.
