ESR Blood Test (Erythrocyte Sedimentation Rate)

ESR or erythrocyte sedimentation rate test measures how quickly red blood cells fall to the bottom in a tall tube to assess inflammation levels. Also called sed rate test, it is used to detect inflammatory diseases or serious infections alongside symptoms when CRP and clinical findings are inconclusive.

In this simple blood test, a blood sample is drawn and added to a vertical tube. As red cells settle, the distance they sink over one hour is measured. Faster sinking (over 25 mm/hr) indicates higher ESR, showing the presence of inflammation. Slower sinking under 15 mm/hr is normal.

Some key uses of this important screening test include:

• Evaluating unexplained body aches and pains
• Detecting inflammatory arthritis or autoimmune disorders
• Monitoring inflammation in illnesses like heart disease, IBD etc.

How often should I get an ESR test?

Get a baseline ESR test by age 20. Repeat annually or whenever onset of symptoms indicates inflammation like unexplained pains, fatigue, fever etc.

What do high vs normal ESR levels mean?

• Normal: 0-15 mm/hr
• Mildly High: 16-50 mm/hr
• Very High: 50+ mm/hr

High ESR over 50 mm/hr indicates substantial inflammation present due to infection, arthritis or other issues. Follow-up testing is recommended.

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