A nurse is caring for a patient receiving chemotherapy who d… | 마이메르시 MyMerci
Adult Health
문제

A nurse is caring for a patient receiving chemotherapy who develops severe neutropenia (ANC < 500/mm³). To implement immediate protective measures, which nursing intervention should be the HIGHEST priority to ensure patient safety?

해설
Severe neutropenia with ANC < 500/mm³ represents a medical emergency requiring immediate implementation of neutropenic precautions to prevent life-threatening infections.

심화 해설

Core Nursing Explanation Key Concept Analysis: This question assesses the priority nursing intervention for a patient with severe neutropenia, a critical condition where the absolute neutrophil count (ANC) falls below 500/mm³. Neutrophils are the body's primary defense against bacterial and fungal infections. When they are severely depleted, the patient is at immediate and extreme risk for life-threatening sepsis. The core nursing principle here is Key Point! prevention of exposure to pathogens. The highest priority is always to establish a safe environment before other supportive or educational measures.

Answer Rationale: Option ① is correct because it directly and immediately addresses the primary threat: exposure to infectious agents. Placing the patient in a private room (also called protective or reverse isolation) and implementing strict neutropenic precautions (including meticulous hand hygiene for all staff and visitors, limiting fresh flowers/plants, ensuring no sick visitors, and possibly using masks) creates a physical barrier against pathogens. This is the first and most critical step in the nursing process for this patient.

Distractor Analysis:
  • Watch out for confusion! Option ② (Administer antibiotics) is an important collaborative intervention, but it is not the independent nursing priority. Prophylactic antibiotics may be ordered, but the nurse's first action is to prevent the need for them by controlling the environment. Monitoring for infection is crucial but follows environmental control.
  • Option ③ (Encourage fluids/nutrition) is a supportive, long-term measure to promote overall health and immune function. It is important but does not address the immediate, life-threatening risk present in severe neutropenia.
  • Option ④ (Educate the patient) is essential for discharge planning and long-term self-management, but education is not the immediate priority when the patient's ANC is critically low and they are in an acute care setting. Safety (isolation) comes first.
Related Concepts: This scenario integrates oncology nursing, infection control, and priority-setting. The NCLEX frequently tests the nurse's ability to distinguish between immediate safety interventions and important but less urgent supportive or educational actions. The concept of "protective isolation" or "neutropenic precautions" is a must-know.

Concept Summary
ConceptKey Points
NeutropeniaANC < 1500/mm³. Severe neutropenia = ANC < 500/mm³. Major risk: infection.
Neutropenic Precautions (Protective Isolation)Private room, strict hand hygiene, no sick visitors/ staff, no fresh flowers/plants, avoid invasive procedures if possible, monitor for subtle signs of infection (e.g., low-grade fever).
Priority SettingIn infection risk: Prevent exposure (1st) > Monitor for signs (2nd) > Administer treatment (3rd) > Educate (4th).

Side-by-Side Comparison!
Type of IsolationPurposeKey MeasuresUsed For
Protective (Neutropenic)Protect the patient from others' germs.Private room, hand hygiene, mask/gloves for staff if indicated, no fresh plants.Severe neutropenia, burns, immunosuppression.
ContactProtect others from the patient's germs.Private room/cohort, gown & gloves for contact, dedicated equipment.MRSA, VRE, C. diff, RSV.
DropletProtect others from large-particle droplets.Private room/cohort, mask for close contact, patient wears mask during transport.Influenza, pertussis, meningococcal meningitis.
AirborneProtect others from small, airborne particles.Negative pressure room, N95 respirator for staff, patient wears mask during transport.TB, measles, varicella.

Anatomy, Physiology & Pharmacology Points
  • Physiology: Neutrophils are a type of white blood cell (WBC) produced in the bone marrow. They are the "first responders" to infection. The Absolute Neutrophil Count (ANC) is calculated: ANC = Total WBC x (%Segs + %Bands).
  • Pharmacology: Chemotherapy drugs are cytotoxic and suppress bone marrow function, leading to myelosuppression. Drugs like filgrastim (Neupogen) may be given to stimulate neutrophil production.

Memory Tips
  • ANC "500" Rule: Think "500 is the danger zone." ANC < 500 = Severe risk = Immediate isolation.
  • Priority Acronym: Prevent exposure → Monitor for fever → Administer meds → Educate (P-M-A-E).

High-Frequency NCLEX Topics This is a classic High Yield topic. The NCLEX loves to test: 1. Recognizing lab values indicating severe neutropenia (ANC < 500). 2. Selecting the correct type of isolation/precautions. 3. Prioritizing nursing actions (safety/environment first!). 4. Identifying subtle signs of infection in an immunocompromised patient (e.g., a fever of 100.4°F / 38°C or higher is often the only sign).

Watch Out for Question Variations!
  • Shift from Symptom to Intervention: "A patient with ANC 300 has a temp of 101°F (38.3°C). What is the priority?" → Answer shifts to notifying the provider immediately (fever in neutropenia is an emergency requiring prompt antibiotics).
  • Shift from Prevention to Monitoring: "After implementing neutropenic precautions, which assessment is most important?" → Answer: Monitoring temperature and for other subtle signs of infection (e.g., chills, malaise, changes in mental status).
  • Discharge Planning Focus: "What is the priority teaching for a patient being discharged with neutropenia?" → Answer shifts to options like "Avoid crowds and people who are ill" and "Report fever immediately."

임상 시나리오

Nursing Clinical Practice Guide Clinical Scenario: You are the nurse on an oncology unit. Mr. Jones, 58, is on day 10 post-chemotherapy for leukemia. His morning lab results show WBC 1.2 K/µL, Neutrophils 10%, Bands 5%. You calculate his ANC as (1.2 x (10+5)) = 1.2 x 15 = 0.18 x 1000 = 180/mm³. He currently has no fever but mentions feeling "a bit more tired than usual."

Nursing Intervention Strategy:
  1. Immediate Action (Priority): Before even leaving the computer station, contact the charge nurse/unit clerk to arrange moving the patient to a private room immediately if not already in one. Place a "Neutropenic Precautions" sign on the door.
  2. Assessment: Perform a focused assessment. Vital signs, especially temperature. Inspect oral mucosa, skin (especially IV sites, perianal area), and lungs. Ask about sore throat, cough, pain, or burning with urination.
  3. Implementation of Precautions:
    • Hand Hygiene: Ensure everyone (staff, visitors, patient) performs hand hygiene with soap and water or alcohol-based gel upon entry and exit.
    • Visitor Restrictions: Limit visitors. Screen them for illness. No children or anyone with cold symptoms.
    • Environmental: Remove any fresh flowers or plants. Ensure room is cleaned daily.
    • Personal Protective Equipment (PPE): Some protocols require staff to wear a mask. Always follow facility policy.
  4. Monitoring & Collaboration: Monitor vital signs per protocol (often every 4 hours). Report any temperature ≥ 100.4°F (38.0°C) STAT to the provider. Anticipate orders for blood cultures and broad-spectrum antibiotics.
  5. Patient Education: Explain the precautions in simple terms. "Your infection-fighting cells are very low right now, so we're taking extra steps to keep you safe from germs."
Patient Safety and Precautions:
  • Contraindications/Actions to Avoid: Do not administer live vaccines (e.g., MMR, varicella). Avoid rectal temperatures, suppositories, or IM injections due to high infection and bleeding risk. Use electric razors, not blades.
  • Medication Cautions: Administer growth colony-stimulating factors (e.g., filgrastim) subcutaneously as ordered. Monitor for bone pain, a common side effect.
  • Key Monitoring Point: The patient may not show classic signs of infection (pus, redness, swelling) due to lack of neutrophils. Key Point! Fever may be the ONLY sign. A low-grade fever is a medical emergency in this population.

Nursing Procedure & Medication Flow Procedure: Implementing Neutropenic Precautions 1. Verify order or protocol for isolation based on ANC. 2. Gather supplies: Signage, hand hygiene supplies, appropriate PPE. 3. Explain the purpose to the patient and family to reduce anxiety and gain cooperation. 4. Place patient in a private room with private bathroom. 5. Post appropriate signage. 6. Instruct all personnel and visitors on hand hygiene requirements before entering. 7. Limit patient's transport outside the room. If necessary, patient should wear a mask. 8. Document initiation of precautions, patient/family education, and ongoing assessments.

Medication: Administering Filgrastim (Neupogen)
  • Action: Stimulates bone marrow to produce neutrophils.
  • Route/Dose: Typically subcutaneous injection daily until ANC recovers.
  • Nursing Considerations: Monitor CBC with differential. Pre-medicate for bone pain if needed. Rotate injection sites. Do not shake the vial.

A Word from Your Senior Nurse "Nursing is not just about carrying out physician orders — it's about being the frontline guardian for your patients! In clinical practice, recognizing the criticality of a lab value like an ANC of 180 and acting swiftly to create a safe environment is what saves lives. When you see that number, your internal alarm bells should ring: 'Isolation NOW.' When studying for your boards, don't just memorize 'private room' — understand the 'why.' It's because a simple common cold virus from a visitor could lead to fatal pneumonia in this patient. That mindset of connecting pathophysiology to action will not only earn you a great score on the NCLEX but will make you a truly confident, professional nurse who anticipates problems before they happen!"

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