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Erythrocyte Sedimentation Rate (ESR) Solution and Procedure

Erythrocyte Sedimentation Rate (ESR) Solution and Procedure
April 11, 2022HematologyLab Tests

Erythrocyte Sedimentation Rate (ESR) Solution

Sample for ESR

  • Blood in EDTA or oxalate can be used.

Principle of ESR

  1. ESR test is based on the principle of sedimentation.
  2. When the blood in an anticoagulant is left, undisturbed RBCs will settle down in the container, or the Wintrobe tube marked 0 to 100 mm.

Definition of ESR

  1. This is the speed of sedimentation of red blood cells in plasma for one hour.
  2. Erythrocytes sedimentation rate (ESR), also known as sed rate, is a nonspecific test.
  3. ESR indicates acute and chronic inflammatory processes.

Indications for ESR

  1. This is a nonspecific test but, when raised, has great significance.
  2. The best test to diagnose occult disease.
  3. Diagnose and monitor temporal arteritis.
  4. Diagnose and monitor the Polymyalgia rheumatica.
  5. Monitoring Hodgkin’s disease.
  6. Advanced Malignancies.
  7. ESR is raised in myocardial infarction, while it is normal in angina.

Factors influencing ESR

  1. Plasma protein:
    1. RBCs suspended in the plasma form few aggregates of RBCs in normal blood. So the rate of sedimentation is slow.
    2. In the case of proteins or globulins, a rouleaux formation will give a false value. So acute phase protein affects the ESR.
      Rouleaux formation affecting ESR

      Rouleaux formation affecting ESR

  2. Number of RBCs:
    1. ESR depends upon the number of RBCs; decreases in anemia, the number of RBCs settles down rapidly.
    2. In the case of polycythemia, RBCs settle slowly, and ESR is low.
  3. The shape of RBCs:
    1. Changes in the shape of RBCs affect the ESR like in Sickle cell anemia; ESR may be low or zero.
      Rouleaux formation affecting ESR

      Sickle cell RBCs affecting ESR

  4. Size of the RBCs:
    1. Macrocytes cells settle more rapidly than microcytes because of their large size.

Technical factors affecting ESR, giving false increased value:

  1. False increased ESR sees in:
    1. Test when reading after one hour. or before one hour.
    2. When there is improper dilution with the anticoagulant.
    3. When the tube is not vertical and is tilted to one side. Even a 3 ° angle can increase the ESR by 30%.
    4. If there is a vibration of the tube during the test.
    5. If blood is not mixed properly or there are micro-clots.
    6. The test is done at room temperature >25 °C. Keep the temperature constant between 20 °C to 25 °C.
    7. Don’t operate the centrifuge machine on the same table.
    8. Don’t move the ESR rack during the process.
    9. Use the fresh blood with EDTA-anticoagulant whole blood.
    10. Fill the ESR tube to the top and avoid any bubbles in it.

Technical factors  affecting ESR and giving false lower values:

  1. When the test is read for less or more than one hour.
  2. Improper mixing of the blood.
  3. Improper dilution of the blood.
  4. If the blood temperature is low.
  5. If there are air bubbles in the tube.
  6. If the room temperature is <20 °C.

Procedure for ESR

Items required:

  1. Analytical balance.
  2.  Trisodium citrate (analytical grade).
  3.  Distal water.

Method to prepare ESR solution:

  1. Weigh 3.8-grams Trisodium citrate/100 mL of water.
  2. Suppose you are preparing 500 mL of ESR solution.
    1. Take 19 grams of Trisodium citrate.
    2. Dissolve in 500 mL of distal water.
    3. Mix thoroughly.

Procedure How to do ESR by Wintrobe method:

  1. ESR should be done within 2 hours of the collection of the blood.
    1. Blood can be kept at 4 °C for 6 hours. Now bring the blood to room temperature.
  2. Take 0.2 mL of ESR solution + 1.8 mL of oxalate blood or blood in EDTA.
  3. Fill the Wintrobe ESR tube. (mix the blood thoroughly before filling the tube).
  4. Mount in the ESR stand.
  5. Start the clock for one hour.
  6. Record the result after one hour.
  7. That is the ratio of settled cells and above clear plasma.
  8. The temperature should be kept between 20 to 25 °C.
    ESR by the Wintrobe tube method

    ESR by the Wintrobe tube method

    ESR procedure

    ESR procedure

Procedure for ESR by Westergren method:

  1. The pipette is graduated from 0 to 200 mm, and the holding rack is used.
  2. This method is more sensitive than the Wintrobe method.
  3. In this case, blood is diluted with 3.8% sodium citrate.

Zeta sedimentation rate (ZSR)

  1. It is not affected by anemia or globulin proteins.
  2. The normal range is the same for males and females. It uses a small amount of blood.
  3. This is good for children because of the small blood volume.
  4. It is calculated from the hematocrit and zitacrit and reported as a percentage.
  5. Procedure for Zitacrit:
    1. A small-bore capillary tube is filled with blood from the finger prick.
    2. This capillary is spun in the special centrifuge called the Zetafuge (Coulter diagnostic).
    3. This tube is read on the special reader to get the value called zitacrit.
    4. Calculation as %: Zitacrit (% of sedimented RBCs)/hematocrit = Result expressed as % (percentage).
    5. Reference values of ZSR for all ages:
      Reference range  % value
      Normal 40 to 51%
      Borderline 51 to 54%
      Raised level ≥55%

Automated Mini-Ves ESR:

  1. Automatic Mini-Ves ESR measures in 20 minutes instead of one hour.
  2. This 20 minute ESR reading correlates to the 1-hour Westergren method.
    1. 1mL of sample is drawn up into a 0.109 mol/L sodium citrate solution.
    2. It is placed in the Mini-VES machine.
    3. This instrument record the reading via its optical assembly.
    4. The second reading is recorded after 20 minutes to give the ESR value.

Normal ESR

Source 1

Age mm/h mm/h
Child 0 to 10
Adult Male Female
<50 years 0 to 15 0 to 20
>50 years 0 to 20 0 to 30

Source 4

Gender  Wintrobe mm/Hour Westergren mm/hour
Men
  1. <50 years of age = 0 to 7
  2. >50 years of age = 5 to 7
  1. <50 years of age = 0 to 15
  2. >50 years of age = 0 to 20
Women
  1. <50 years of age = 0 to 15
  2. >50 years of age = 25 to 30
  1. <50 years of age = 0 to 20
  2. >50 years of age = 0 to 30
Children
  1. 0 to 13

Increased ESR Value:

  1. Severe Anemia.
  2. Macrocytosis.
  3. Pregnancy.
  4. Increased plasma globulins.
  5. Increased plasma fibrinogen.
  6. Multiple myelomas.
  7. Acute and chronic inflammatory conditions.
  8. Autoimmune inflammatory diseases.
  9. Chronic renal failure.
  10. Cancers (malignant tumors).
  11. Acute myocardial infarction.

Decreased ESR value:

  1. In the case of Sickle cell anemia.
  2. Microcytosis.
  3. Spherocytosis.
  4. Polycythemia.
  5. Increased plasma viscosity.
Clinical diseases ESR is raised ESR not raised
Hematological diseases
  1. Severe anemia
  2. Macrocytosis
  3. Multiple myeloma
  4. Increased plasma fibrinogen
  1. Sickle cell anemia
  2. Spherocytosis
  3. Polycythemia
  4. Microcytosis
Infections
  1. Pulmonary tuberculosis
  2. Bacterial infections
  3. Acute hepatitis
  1. Infectious mononucleosis
  2. Typhoid fever
  3. Undulant fever
  4. Malarial paroxysm
  5. Viral disease (uncomplicated)
Abdominal diseases
  1. Acute pelvic inflammatory disease
  2. Ruptured ectopic pregnancy
  3. Pregnancy is the third month to 3 weeks after the postpartum
  1. Acute appendicitis in the first 24 hours
  2. Early pregnancy
Cardiac diseases
  1. Acute myocardial infarction
  2. Acute rheumatic fever
  3. After open-heart surgery
  1. Angina pectoris
  2. Active renal failure with heart failure
Joint diseases
  1. Rheumatoid arthritis
  2. Pyogenic arthritis
  3. Autoimmune diseases involving joints
  1. Degenerative arthritis
Other miscellaneous diseases
  1. Decreased serum albumin
  2. Temporal arteritis
  3. Hypothyroidism
  4. Hyperthyroidism
  5. Acute hemorrhage
  6. Acute hemorrhage
  7. Cancer of the colon and breast
  1. Acute allergy
  2. Peptic ulcer

Summary of the erythrocyte sedimentation rate (ESR):

  1. This is a simple and nonspecific test to find the presence of the inflammatory process.
  2. It helps monitor conditions like anemia, renal diseases, acute myocardial infarction, and collagen diseases.
  3. It does not help to diagnose the disease. The normal ESR does not rule out malignancy and other serious diseases.
  4. It only helps to see the progress of the disease.
  5. ESR is a good indicator of hidden diseases like tuberculosis, SLE, and subacute bacterial endocarditis.
  6. ESR will differentiate between:
    1. AMI vs angina pectoris.
    2. Acute appendicitis vs ruptured ectopic pregnancy.
    3. Rheumatoid arthritis vs osteoarthritis.
    4. Acute vs silent gout.
    5. Iron deficiency anemia vs anemia of acute or chronic diseases.
  • NOTE: Please see more details on ESR in CBC.
Question 1: What is the value of ESR in myocardial diseases
Show answer
In acute myocardial infarction is raised while it is normal in angina pectoris.
Question 2: What is the value of ESR in RA and osteoarthritis?
Show answer
ESR is raised in RA and is normal in osteoarthritis.

Possible References Used
Go Back to Hematology

Comments

Josh Nati Reply
August 1, 2020

i like it, note

Dr. Riaz Reply
August 1, 2020

Thanks.

Renna Desai Reply
August 23, 2020

I agree with you

Dr. Riaz Reply
August 23, 2020

Thanks.

Usman Muhammad Arjali Reply
October 29, 2020

Thanks for your effort

Dr. Riaz Reply
October 29, 2020

Thanks.

Sonu Chawla Reply
May 22, 2022

Thanks for this

Dr. Riaz Reply
May 22, 2022

Welcome.

Sonu Chawla Reply
May 22, 2022

Thanks for again

Chhaya Reply
May 23, 2022

Tq sir for this information

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