A provider orders an ESR to be performed on a patient and describes the test to the patient. Which of the following statements made by the patient indicates an understanding of the teaching?
"This test measures my estrogen serum ratio after menopause."
"This test measures the fluctuation of serum protein."
"This test measures my hemoglobin levels."
"This test measures the distance my RBCs have dropped."
The Correct Answer is D
A. "This test measures my estrogen serum ratio after menopause." ESR stands for erythrocyte sedimentation rate, not estrogen serum ratio. This is an incorrect interpretation of the test.
B. "This test measures the fluctuation of serum protein." The ESR does not directly measure serum protein levels. It measures the rate at which red blood cells sediment in a period of one hour.
C. "This test measures my hemoglobin levels." Hemoglobin levels are measured by a hemoglobin test, not an ESR. This statement is incorrect.
D. "This test measures the distance my RBCs have dropped." This is the correct understanding. ESR measures the rate at which red blood cells settle at the bottom of a test tube over a specified period, indicating the distance the RBCs have dropped.
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Correct Answer is D
Explanation
A. Yellow: The yellow tube, used for blood cultures, is typically collected first to prevent contamination.
B. Light blue: The light blue tube is used for coagulation studies and should be collected before tubes containing additives that could interfere with coagulation tests.
C. Red: The red tube, which may contain no additives or a clot activator, is usually collected after the light blue tube.
D. Gray: The gray tube is used for glucose testing and should be filled last as it contains additives that could interfere with other tests if collected earlier.
Correct Answer is B
Explanation
A. Ischemia: Ischemia refers to the lack of blood flow to tissues, which can lead to tissue damage or death, but it is not related to swelling due to fluid accumulation.
B. Edema: Edema is the correct term for tissue swelling caused by the accumulation of interstitial fluids, making this the correct choice.
C. Infarction: Infarction refers to tissue death due to a lack of blood supply, not to swelling caused by fluid accumulation.
D. Gangrene: Gangrene is the death of body tissue due to a lack of blood flow or severe infection, not related to fluid accumulation and swelling.