A nurse is caring for a 38-year-old female client with acquired immunodeficiency syndrome (AIDS) who has developed Pneumocystis jirovecii pneumonia (PCP). The client's CD4+ T cell count is 85 cells/mm³. Which nursing intervention should be the priority?

With a CD4+ count of 85 cells/mm³ and active PCP, the client is at extreme risk for secondary infections, making strict isolation precautions the priority to prevent life-threatening complications. Other interventions are supportive but do not address the immediate need for infection control.

Core Nursing Explanation Key Concept Analysis: This question tests the priority nursing intervention for a patient with Acquired Immunodeficiency Syndrome (AIDS) complicated by Pneumocystis jirovecii pneumonia (PCP). The core concept is infection control and prevention in the context of severe immunosuppression. The patient's CD4+ T cell count of 85 cells/mm³ indicates profound immunodeficiency (normal is >500 cells/mm³), placing them at extremely high risk for acquiring new infections or worsening existing ones. PCP itself is an opportunistic infection that occurs when the immune system is severely compromised.

Answer Rationale: Key Point! The priority is Implementing strict isolation precautions. In this scenario, the patient's primary defense against pathogens is critically impaired. The most immediate threat is not just the PCP, but the risk of acquiring additional, potentially fatal, secondary infections from the healthcare environment or other people. Protecting the patient from new pathogens is a proactive, life-saving measure that takes precedence over managing the symptoms of the existing condition. This aligns with the nursing principle of preventing harm first.

Distractor Analysis:
Watch out for confusion! Option ① (Encourage fluids) is a supportive measure for managing pneumonia and preventing dehydration, but it is not the priority when the patient's immune system is essentially non-functional. The risk of a new infection outweighs the risk of dehydration from the current one.
Option ② (Administer antiretroviral therapy) is crucial for long-term management of HIV/AIDS to suppress the virus and allow immune reconstitution. However, its effects are not immediate. It does not address the acute, life-threatening risk of exposure to other infections present in the current hospitalization context.
Option ④ (Monitor O2 saturation) is a critical intervention for a patient with active pneumonia, as PCP can cause severe hypoxemia. While this is a high-priority action, it is a monitoring and symptom management intervention for the existing problem. The question asks for the priority intervention, which in immunocompromised patients is often preventing the next, more dangerous problem (a new infection) before it occurs.

Related Concepts: This question integrates knowledge of HIV/AIDS pathophysiology, the significance of CD4+ counts, common opportunistic infections like PCP, and the hierarchy of nursing actions. It emphasizes that for severely immunocompromised patients, protective (reverse) isolation or strict infection prevention protocols are often the top priority to create a safe environment.

Concept Summary
Pathophysiology Chain: HIV → Depletes CD4+ T cells (

Nursing Clinical Practice Guide Clinical Scenario: You are assigned to care for Ms. Johnson, a 38-year-old woman admitted with worsening shortness of breath and dry cough. She has a known HIV diagnosis and her lab results show a CD4+ count of 85 cells/mm³. A bronchoalveolar lavage confirms Pneumocystis jirovecii pneumonia (PCP). She is started on IV TMP-SMX and supplemental oxygen.

Nursing Intervention Strategy: 1. Immediate Action (Priority): Place the patient in a private room. Implement Contact Precautions and Droplet Precautions as per your facility's protocol for immunocompromised patients (often called "Protective Precautions" or "Reverse Isolation"). This means:
- All staff and visitors must perform meticulous hand hygiene before and after contact.
- Wear a gown and gloves for any direct contact with the patient or their environment.
- The patient should wear a surgical mask when transported outside the room.
- Restrict visitors who are ill, including those with mild colds.
2. Concurrent Monitoring: While setting up isolation, ensure continuous pulse oximetry is in place. Assess respiratory rate, effort, oxygen saturation, and lung sounds every 2-4 hours or as ordered. Administer oxygen as prescribed to maintain SpO2 >92%.
3. Supportive Care & Medication Administration:
- Administer IV TMP-SMX on time. Monitor for side effects: rash, fever, nausea, bone marrow suppression (check CBC), and hyperkalemia.
- Encourage oral fluid intake (2-3 L/day if not contraindicated) to help thin secretions and manage fever.
- Provide frequent oral care to prevent superimposed oral candidiasis.
- Administer ART (antiretroviral therapy) exactly on schedule. This is non-negotiable for long-term management.
4. Patient & Family Education: Explain *why* isolation is necessary—it's to protect *her*, not because she is dangerous to others. Teach signs of infection to report (fever, chills, new cough, dysuria). Reinforce the importance of adhering to ART after discharge.

Patient Safety and Precautions:
- Key Point! Never delay initiating isolation precautions to perform other tasks. Protection comes first.
- Be vigilant for signs of acute respiratory distress from PCP, which may require escalation to non-invasive or mechanical ventilation.
- Monitor for allergic reactions to TMP-SMX, especially in HIV patients.
- Ensure all equipment entering the room (stethoscope, blood pressure cuff) is dedicated to that patient or cleaned/disinfected before use on another.

Nursing Procedure & Medication Flow
Setting Up Protective Isolation:
1. Notify the charge nurse and infection control.
2. Assign a private room with negative air pressure (if available for airborne protection) or positive pressure (for strict protective isolation) – follow facility policy.
3. Place appropriate signage on the door (e.g., "Protective Precautions").
4. Stock the room with dedicated PPE (gowns, gloves, masks).
5. Educate the patient and all entering personnel on the protocol.
Administering TMP-SMX (IV):
- Usually given every 6-8 hours. Infuse over 60-90 minutes to reduce vein irritation.
- Monitor for infusion site reactions.
- Check BUN, creatinine, and potassium levels regularly due to risk of nephrotoxicity and hyperkalemia.

A Word from Your Senior Nurse "In the rush of managing a patient with severe pneumonia, it's easy to focus solely on the breathing. But with an AIDS patient, you must think one step ahead. That low CD4+ count means they are living in a world full of invisible threats. Your most powerful nursing action isn't the medication you give; it's the barrier you create. By meticulously enforcing those precautions, you are literally building a temporary immune system around your patient. On the NCLEX and in real life, never underestimate the priority of prevention, especially when your patient has no defenses left."