Question

Study Questions 1. State the principle of the ESR. 2. What is the reference range for ESR including the reporting units. Adult man: Adult woman: 3. State the specimen requirement for ESR and time limits for performing the test. 4. The timer is set for 10 minutes when running a Westegren sed rate? 5. State 4 sources of error when performing an ESR 6. The ESR can be used to differentiate appendicitis from and Circle the condition(s) in which the ESR is elevated in the first 24 hours. 7. The ESR can be used to differentiate angina pectoris from Circle the condition in which the ESR is elevated. 8. Which arthritis does NOT elevate the ESR? 9. Is the ESR Increased or Decreased (UD) in the following conditions? a. Sickle cells present b. Increased environmental temperature c. Unlevel ESR rack d. Nearby centrifuge use e. Elevated plasma immunoglobulin

Answer 1

Ans) 1) Principle of ESR:

- The erythrocyte sedimentation rate (ESR) is a nonspecific measurement used to detect and monitor an inflammatory response to tissue injury. lt denotes the presence of disease but not its severity. The ESR is affected by three factors: erythrocytes, plasma concentration, and mechanical /technical factors.

2) ESR test results are measured in millimeters per hour (mm/hr). The following are considered normal ESR test results: Women under age 50 should have an ESR between 0 and 20 mm/hr. Men under age 50 should have an ESR between 0 and 15 mm/hr.

3) Specimen must be sent as whole blood. Specimen stability: ESR Vacuum tube (black top tube): 12 hours room temperature, 24 hours refrigerated. Lavender top (EDTA) tube: GHS: Room temperature 12 hours.

4) Sed rate test will be reported in the distance in millimeters (mm) that red blood cells have descended in one hour (hr). The normal range is 0-22 mm/hr for men and 0-29 mm/hr for women. The upper threshold for a normal sed rate value may vary somewhat from one medical practice to another.