ESR Blood Test

Erythrocyte Sedimentation Rate (ESR)

ESR Blood Test
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Pricing From £28
Consultation duration 20 mins
Professional Private GP
Next Steps Consultation
Results 24 hours
An Erythrocyte Sedimentation Rate (ESR) blood test is conducted to measure inflammation in the patient’s body. The ESR blood test measures how quickly it takes for red blood cells to drop to the bottom of a test tube. The quicker they fall, the more likely there are high levels of inflammation.

An ESR blood test is helpful in the diagnosis of conditions associated with high inflammation. Conditions associated with inflammation include

  • Arthritis
  • Endocarditis
  • Crohn’s Disease
  • Giant Cell Arteritis
  • Polymyalgia Rheumatica

An ESR blood test can also help detect if you have an infection.

What is ESR?

ESR is an indirect measure of inflammation which is present in the body. The test measures the sedimentation (rate of fall) of red blood cells (also known as erythrocytes). The red blood cells are counted as they fall to the bottom of a tall, thin blood tube.

After an hour, the number of millimetres of clear plasma present at the top of the column is measured.

The red blood cells will fall slowly in a healthy, inflammation-free body, leaving very little clear plasma. However, increased blood levels of specific proteins that increase inflammation (such as immunoglobulins and fibrinogen) cause the red blood cells to fall faster, increasing the ESR.

Both ESR and C-reactive protein (CRP) are markers of inflammation. Usually, ESR changes less rapidly as the concentration of CRP. However, CRP is not affected by as many factors as ESR.

It is important to note that a slightly higher ESR is detected in women, and both menstruation and pregnancy can cause temporary elevations.

How is the test administered?

Whilst there are no preparations necessary for an ESR Blood test, you must let your health care provider know if you are taking any medication. Several medications may increase or decrease your ESR, so you must let your provider know which medication you take.

The ESR Blood Test is a simple blood test where the phlebotomist will take a small sample of blood and collect it in a vial or test tube. The process usually takes around five minutes.

If you’re interested in enquiring about our EST blood tests or other tests, please get in touch with us today by phone or through our contact form.

Blood tests are ordered by the doctor as needed, based on the patient’s symptoms and concerns. Occasionally alternate or additional tests may be required for accurate diagnosis.

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