Nursing Elites

1. A client has been receiving cyanocobalamin (B12) injections for the past 6 weeks. Which laboratory finding indicates that the medication is having the desired effect?

• A. Neutrophil count of 60%
• B. Basophil count of 0.5%
• C. Monocyte count of 2%
• D. Reticulocyte count of 1%

Correct answer: D

Rationale: Cyanocobalamin is a B12 medication used for pernicious anemia. A reticulocyte count of 1% indicates the desired effect of the medication, as reticulocytes are immature red blood cells that increase in response to B12 therapy, improving anemia. Neutrophils, basophils, and monocytes are white blood cells and are not directly influenced by B12 injections, making them incorrect choices.

2. A client is having psychological counseling for problems communicating with his mother. Which model of stress is the most useful in reference to this stressor?

• A. Adaptation Model
• B. Stimulus-Based Model
• C. Transaction-Based Model
• D. Selye's Model of Stress

Correct answer: C

Rationale: The Transaction-Based Model, proposed by R.S. Lazarus, is the most relevant model of stress in the context of a client facing communication issues with his mother. This model takes into consideration individual differences and cognitive processes that occur between a stressor and the individual's response. It emphasizes the importance of how the individual perceives and interprets the stressor, incorporating mental and psychological components. In this scenario, the client's difficulties in communicating with his mother involve complex cognitive processes and individual perceptions, making the Transaction-Based Model the most suitable choice. The other options are not as relevant in this context: the Adaptation Model focuses on adjustment to stress over time, the Stimulus-Based Model emphasizes external factors as stressors, and Selye's Model of Stress mainly centers on the physiological response to stress.

3. The nurse is caring for a client admitted with Class III/IV Pulmonary Hypertension. The nurse explains to the client that Lanoxin is being administered to the client in order to:

• A. Manage peripheral edema
• B. Improve right ventricular function
• C. Increase pulmonary pressure
• D. Constrict the pulmonary vessels

Correct answer: B

Rationale: The correct answer is to improve right ventricular function. Lanoxin, also known as digoxin, is a cardiac glycoside that works by slowing the heart rate and increasing myocardial contractility, especially in the ventricles. This action helps improve the efficiency of the heart's pumping function, particularly the right ventricle in conditions like pulmonary hypertension. Choice A, managing peripheral edema, is not directly related to Lanoxin's mechanism of action. Choice C, increasing pulmonary pressure, is incorrect as Lanoxin is not used to increase pressure in the pulmonary circulation. Choice D, constricting the pulmonary vessels, is incorrect as Lanoxin does not cause vasoconstriction in the pulmonary vessels but rather acts on the heart's contractility.

4. A client with asthma develops respiratory acidosis. Based on this diagnosis, what should the nurse expect the client's serum potassium level to be?

• A. normal
• B. elevated
• C. low
• D. unrelated to the pH

Correct answer: B

Rationale: In respiratory acidosis, the body retains CO2, leading to increased hydrogen ion concentration and a drop in blood pH. As pH decreases, serum potassium levels increase due to the movement of potassium out of cells to compensate for the acidosis. Elevated serum potassium levels are expected in respiratory acidosis. Choice A ('normal') is incorrect because potassium levels are expected to be elevated in respiratory acidosis. Choice C ('low') is incorrect as potassium levels rise in this condition. Choice D ('unrelated to the pH') is incorrect as serum potassium levels are directly impacted by changes in pH in respiratory acidosis.

5. What is pica?

• A. dependency on alcohol
• B. increased iron in the diet
• C. the sickle cell trait
• D. eating ice

Correct answer: D

Rationale: Pica is a disorder characterized by the ingestion of nonfood substances, which can lead to a clinical iron deficiency. It may be the first sign of an underlying issue. Individuals with pica consume a variety of nonfood items such as ice, clay, dirt, or paste. Choice A, dependency on alcohol, is incorrect as it is not related to pica. Choice B, increased iron in the diet, is incorrect because pica involves ingesting nonfood items rather than having an increased intake of iron. Choice C, the sickle cell trait, is unrelated to pica and is therefore incorrect.

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