# A nurse is caring for a client diagnosed with vitamin B12 deficiency anemia. Which nursing intervention should be the priority?

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> subject: Adult Health

## 문제

A nurse is caring for a client diagnosed with vitamin B12 deficiency anemia. Which nursing intervention should be the priority?

## 보기

1. Administer prescribed vitamin B12 injections as ordered **✔ 정답**
2. Encourage the client to increase iron-rich foods in their diet
3. Monitor the client's oxygen saturation levels continuously
4. Restrict the client's physical activity to bed rest only

**정답: 1**

## 해설

Vitamin B12 injections are the priority intervention as they directly address the underlying cause of the anemia. Other options are supportive but not primary treatments.

## 심화 해설

Understanding the Priority

When caring for a client with vitamin B12 deficiency anemia, the nurse must first address the underlying cause of the condition. This type of anemia develops because the body lacks sufficient vitamin B12 to produce healthy red blood cells, leading to a reduction in oxygen-carrying capacity. The most direct and effective way to correct this deficiency is to replace the missing vitamin. Long-term use of certain medications, such as metformin for type 2 diabetes, is a known risk factor for developing this deficiency, which can progress to serious complications like anemia and neuropathy if not identified and treated [1].

Analyzing the Options

- Option 1 (Correct): Administering prescribed vitamin B12 injections directly addresses the pathophysiological deficit. In pernicious anemia or severe deficiency states where absorption is impaired, parenteral replacement bypasses the gastrointestinal tract to ensure the vitamin reaches the bloodstream. This is the cornerstone of treatment and the highest priority to halt the progression of the deficiency and allow the bone marrow to resume normal erythropoiesis. While research is ongoing to evaluate the benefits of oral supplementation in specific populations, parenteral therapy remains a standard, definitive intervention for diagnosed deficiency .

- Option 2: Encouraging iron-rich foods is an intervention for iron deficiency anemia, not vitamin B12 deficiency anemia. While a balanced diet is important for overall health, increasing iron intake will not correct the underlying problem of insufficient B12.

- Option 3: Monitoring oxygen saturation is an important assessment for any client with anemia, as reduced hemoglobin can lead to hypoxia. However, assessment is not the priority over a direct intervention that treats the root cause. The most effective way to improve oxygenation long-term is to restore the hemoglobin level by treating the deficiency.

- Option 4: Restricting activity to bed rest may be necessary for clients experiencing severe fatigue or dyspnea on exertion due to profound anemia. However, this is a supportive measure to reduce oxygen demand, not a treatment. The priority is the intervention that will reverse the condition, thereby improving the client's activity tolerance.

Clinical Reasoning and Safety

The NCLEX-RN prioritizes interventions using frameworks like the ABCs (Airway, Breathing, Circulation) and Maslow's hierarchy. While oxygenation (Breathing/Circulation) is a concern in anemia, the most critical step in restoring circulatory function is to provide the necessary building blocks for red blood cell production. Administering the prescribed B12 injection is the definitive treatment that will resolve the anemia and its associated risks. Delaying this medication to perform other supportive or non-specific interventions would compromise the client's recovery and potentially lead to worsening neurological or hematological complications [1].References (research sources)

- [1]Vitamin B<sub>12</sub> deficiency in long-term metformin use and clinician awareness: a scoping review.Research articleParsonage I, Wainwright D, Barratt J. (2026) · DOI: 10.1136/bmjopen-2025-113829

## 임상 시나리오

Vitamin B12 Deficiency: Priority InterventionReplacing the missing vitamin is the cornerstone of care.
The priority for a client with vitamin B12 deficiency anemia is to administer the prescribed vitamin B12 injections. This directly corrects the pathophysiological deficit, allowing the bone marrow to resume normal red blood cell production.

In cases of pernicious anemia or severe deficiency where absorption is impaired, the injection route bypasses the gastrointestinal tract. This ensures the vitamin reaches the bloodstream effectively, halting progression to complications like nerve damage.

CautionDo not confuse treatment with that of iron deficiency anemia. Encouraging iron-rich foods is not the priority for a B12 deficiency. Also, long-term metformin use is a key risk factor to assess.

## 핵심 개념

- **Pernicious Anemia** — A type of vitamin B12 deficiency anemia caused by a lack of intrinsic factor, leading to impaired B12 absorption in the ileum.
- **Erythropoiesis** — The process of red blood cell production in the bone marrow, which is impaired in B12 deficiency.
- **Parenteral Route** — Administration of medication by injection, bypassing the gastrointestinal tract, used when absorption is impaired.

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