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- $Unique_ID{BRK01480}
- $Pretitle{}
- $Title{What is a Blood Sed Rate?}
- $Subject{sed rate blood test special procedures laboratory tests erythrocyte
- sedimentation esr red cells cell settle sediment anticoagulated temporal
- arteritis polymyalgia procedure lab rates settling}
- $Volume{P-7, D-7}
- $Log{
- Blood Sample After Separation*0002101.scf
- Blood Cell Count Usage in Diagnosis*0002102.scf}
-
- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
-
-
- What is a Blood Sed Rate?
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-
- QUESTION: Please explain--what is a blood sed rate, and what is normal? What
- determines the rate and how can it be changed? I am eager to know about this
- mysterious condition and will appreciate any enlightenment.
-
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-
- ANSWER: The sed rate, technically the erythrocyte sedimentation rate or ESR,
- measures the rate that red blood cells settle or sediment in an anticoagulated
- sample of venous blood. There is little sedimentation in normal blood because
- the red cells only have a slightly heavier density than the blood plasma.
- The sed rate varies with the age and sex of the patient. It is also
- affected by smoking, pregnancy, menstrual cycle, abnormal red cells shapes and
- other factors. In normal men, the red cells drift down at a rate of between
- 1-13 mm per hour. Women may show a rate of 1-20 mm/hour and still be
- considered normal.
- The test has been used to screen for numerous diseases, including
- infections and acute and chronic inflammations. It can also be used as a
- screening tool in patients with nonspecific problems or systemic disease.
- Repeated ESR testing may also allow doctors to monitor disease activity,
- helping them to track the progress of a disease and determining whether things
- are getting better or worse by noting significant increases or decreases in
- the sed rate. For example, in such diseases as temporal arteritis and
- polymyalgia, a normal ESR is very rare but repeated sed rate testing done over
- a period of time allows doctors to monitor disease progression. It is
- important to realize that the ESR is merely a test, useful for evaluating and
- following various conditions, but is not a disease in and of itself. Although
- once an important study of great assistance in helping to make a diagnosis for
- many patients, it is less so these days because of the development of so many
- new and more sensitive tests. Still in some cases it remains a very valuable
- tool.
-
- ----------------
-
- 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.
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-