The nurse cares for a client who is a pale and reports frequent fatigue, weakness and dizziness. Which serum laboratory test result is the nurse’s priority for planning care?

RBCs 4.3mEq/L

Potassium 4.8 mEq/L

Hemoglobin of 9g/dl

Sodium 137 mEq/L

Answer and Explanation

The Correct Answer is C

A) RBCs 4.3 million/µL:
While a low RBC count can indicate anemia, the specific value provided here is not suggestive of anemia, and it does not explain the patient's symptoms of fatigue, weakness, and dizziness as clearly as a low hemoglobin would.

B) Potassium 4.8 mEq/L:
This result is not concerning and does not directly relate to the patient's reported symptoms of pallor, fatigue, and dizziness. Therefore, this lab result does not take priority in planning care at this time.

C) Hemoglobin of 9 g/dl:
This result is consistent with anemia, which is a likely cause of the patient’s symptoms of fatigue, weakness, dizziness, and pallor. Anemia can lead to decreased oxygen delivery to tissues, explaining the symptoms the patient is experiencing. The priority action for the nurse should be to address the underlying cause of anemia and manage it to improve the patient’s oxygenation and overall condition.

D) Sodium 137 mEq/L:
Although sodium imbalances can cause neurological symptoms such as confusion or lethargy, the patient’s reported symptoms of pallor, fatigue, and dizziness are more likely related to anemia. Sodium is not the most urgent concern for this patient at the moment.

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Correct Answer is B

Explanation

A. Pernicious anemia:
Pernicious anemia is primarily caused by a deficiency in vitamin B12, often due to a lack of intrinsic factor needed for absorption in the gut. It typically presents with symptoms like weakness, fatigue, and neurological manifestations such as numbness or tingling. However, the client’s presentation does not suggest a vitamin B12 deficiency or neurological signs. Additionally, pernicious anemia is not typically associated with heavy menstrual periods,
which are more indicative of blood loss anemia.

B. Blood loss anemia:
Blood loss anemia is the most likely diagnosis in this case, especially in the context of heavy menstrual periods, which can cause significant blood loss over time. The client’s hemoglobin level of 6.9 g/dL indicates severe anemia, which is consistent with the cumulative effects of chronic blood loss. This type of anemia results from a decrease in red blood cell count due to bleeding, which can lead to symptoms like weakness, fatigue, and pallor.

C. Sickle cell anemia:
Sickle cell anemia is a genetic condition characterized by abnormally shaped red blood cells, which can lead to hemolysis and episodes of pain. While it can cause symptoms like fatigue and weakness, sickle cell anemia typically presents earlier in life and is more associated with episodes of severe pain and organ damage. Additionally, the patient’s history does not mention episodes of pain or other hallmark signs of sickle cell disease, such as swelling in the hands or feet or recurrent infections.

D. Aplastic anemia:
Aplastic anemia occurs when the bone marrow fails to produce enough blood cells, including red blood cells, white blood cells, and platelets. It presents with symptoms like weakness, fatigue, frequent infections, and bruising. Although this client does have anemia, the lack of additional signs (such as petechiae, infections, or bleeding) makes this diagnosis less likely. Aplastic anemia is also usually diagnosed with bone marrow biopsy, which is not suggested by this client's presentation.

A. Troponins I & T B. Creatine Kinase C. C Reactive Protein D. Myoglobin

Correct Answer is A

Explanation

A. Troponins I & T:
Troponins I and T are the most specific biomarkers for myocardial damage. These proteins are released into the bloodstream when the heart muscle is injured, such as during a myocardial infarction (MI). Troponins remain elevated for a prolonged period (typically up to 1-2 weeks) after myocardial injury, making them highly sensitive for detecting both acute and recent myocardial damage. Because of their high specificity for heart muscle, they are considered the gold standard for diagnosing acute myocardial infarction.

B. Creatine Kinase:
Creatine kinase (CK) is an enzyme found in the heart, brain, and skeletal muscle. While CK-MB (the heart-specific isoenzyme) can be elevated in cases of myocardial damage, it is less specific than troponins because it can also be elevated due to skeletal muscle injury or other conditions. CK-MB levels rise more rapidly than troponins but return to baseline within 48-72 hours, making it less useful for detecting myocardial damage over a longer period.

C. C-Reactive Protein (CRP):
C-Reactive Protein (CRP) is an acute-phase reactant produced by the liver in response to inflammation or tissue injury. While CRP levels can be elevated in various inflammatory conditions, including atherosclerosis, it is not specific to myocardial damage. Elevated CRP is associated with increased risk for cardiovascular events but does not provide specific information about acute myocardial injury, making it less helpful for diagnosing myocardial infarction.

D. Myoglobin:
Myoglobin is an oxygen-binding protein found in both skeletal and cardiac muscle. While it is an early marker that rises rapidly after muscle injury, it lacks specificity for myocardial damage because it is also released from skeletal muscle. Myoglobin levels peak quickly (within 1-4 hours of injury) and return to baseline within 24 hours, so it is not as useful for diagnosing a myocardial infarction or monitoring long-term cardiac injury.

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The nurse cares for a client who is a pale and reports frequent fatigue, weakness and dizziness. Which serum laboratory test result is the nurse’s priority for planning care?

Nursing Test Bank

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