Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
A sedimentation rate is common
blood test that is used to detect and monitor inflammation in the body. The sedimentation rate is also called the
erythrocyte sedimentation rate because it is a measure of the red blood cells (erythrocytes) sedimenting in a tube over a given period of time. Sedimentation rate is often
abbreviated as sed rate or ESR.
How is a sedimentation rate performed?
A sedimentation rate is performed
by measuring the rate at which red blood cells (RBCs) settle in a test tube. The
RBCs become sediment in the bottom of the test tube over time, leaving the blood
serum visible above. The classic sedimentation rate is simply how far the top of the RBC
layer has fallen (in millimeters) in one hour. The sedimentation rate increases with more inflammation.
What is the normal sedimentation rate?
The normal sedimentation rate (Westergren method) for males is 0-15 millimeters per hour, females is 0-20 millimeters per hour. The sedimentation rate can be slightly more elevated in the elderly.