A nurse is caring for a client with acquired immunodeficiency syndrome (AIDS) who has developed Pneumocystis jirovecii pneumonia (PCP). The client's CD4+ T cell count is 45 cells/mm³. Which nursing intervention should be the priority?

With a CD4+ count of 45 cells/mm³, the client is severely immunocompromised and at high risk for fatal secondary infections. Strict isolation is the priority to prevent nosocomial infections, while other interventions are supportive but less immediate.

Core Nursing Explanation Key Concept Analysis: This question tests the priority nursing intervention for a patient with Acquired Immunodeficiency Syndrome (AIDS) and an active opportunistic infection, Pneumocystis jirovecii pneumonia (PCP). The critical data point is the CD4+ T cell count of 45 cells/mm³, indicating profound immunosuppression. The core nursing principle is Infection Prevention and Control. When a patient's immune system is critically compromised, protecting them from new, potentially life-threatening infections becomes the highest priority, superseding other supportive care measures.

Answer Rationale: Key Point! Option ②, "Implement strict isolation precautions," is correct because it directly addresses the patient's greatest vulnerability. With a CD4+ count below 200 cells/mm³, the patient is at extreme risk for opportunistic infections. In this context, "strict isolation" typically refers to Protective (Reverse) Isolation or neutropenic precautions, designed to protect the immunocompromised host from pathogens in the environment, not to isolate the patient from others. The priority is to prevent a secondary nosocomial infection, which could be catastrophic.

Distractor Analysis:
• Option ① (Encourage fluids): While hydration is important for managing fever and thinning respiratory secretions in pneumonia, it is a supportive measure, not the priority for preventing new infections in a severely immunocompromised state.
• Option ③ (Administer antiretroviral therapy): Antiretroviral therapy (ART) is the cornerstone of long-term HIV management and works to suppress viral load and allow CD4+ counts to rise. However, in the acute setting of a serious opportunistic infection like PCP, the immediate threat is from external pathogens due to the existing, critically low CD4+ count. ART is essential but not the immediate safety priority.
• Option ④ (Provide nutritional supplements): Good nutrition supports overall health and immune function, but its effects are long-term. It does not address the acute, life-threatening risk of infection posed by the current level of immunosuppression.

Related Concepts: This scenario integrates knowledge of HIV pathophysiology, the role of CD4+ T cells, common opportunistic infections, and the nursing priority of safety. Remember: Airway, Breathing, Circulation (ABCs) are always the first assessment priorities. In this case, the patient already has a respiratory infection (PCP), so maintaining a patent airway and adequate oxygenation are also critical. However, the question asks for the priority nursing intervention given the clinical data, which shifts the focus to preventing the next, preventable complication—a new infection.
Concept Summary • CD4+ T Cell Count: Key indicator of immune function in HIV. Normal is 500-1,500 cells/mm³. Counts

Nursing Clinical Practice Guide Clinical Scenario: You are assigned to Mr. Johnson, a 38-year-old male with AIDS, admitted with a diagnosis of PCP. He has a persistent dry cough, fever of 38.8°C (101.8°F), and reports increasing shortness of breath with minimal activity. His latest lab shows a CD4+ count of 45 cells/mm³ and an elevated lactate dehydrogenase (LDH). He is started on IV TMP-SMX and high-dose corticosteroids.

Nursing Intervention Strategy:
1. Assessment: Perform a comprehensive respiratory assessment every 4 hours: rate, depth, effort, use of accessory muscles, oxygen saturation (SpO2), lung sounds (may have fine crackles), and sputum characteristics. Monitor vital signs, especially temperature. Assess for signs of infection at IV sites and mucous membranes.
2. Infection Prevention (Priority Action): Place patient in a private room. Implement protective precautions. Post signage. Enforce strict hand hygiene for everyone entering the room. Screen all visitors and staff for any signs of illness (cough, sore throat, fever). Ensure the patient wears a mask if he must leave the room for procedures.
3. Medication Administration & Monitoring: Administer IV TMP-SMX as scheduled, monitoring for infusion reactions. Be vigilant for side effects: rash, fever, bone marrow suppression (monitor CBC), hyperkalemia, and nephrotoxicity (monitor BUN, creatinine, I&O). Administer corticosteroids (e.g., prednisone) to reduce pulmonary inflammation, but monitor for hyperglycemia.
4. Supportive Care: Provide supplemental oxygen as ordered to maintain SpO2 >92%. Encourage fluid intake (2-3 L/day if not contraindicated) to help thin secretions. Provide frequent oral care to prevent stomatitis. Offer small, frequent, high-protein, high-calorie meals to combat wasting.
5. Patient Education & Psychosocial Support: Educate the patient on the purpose of isolation (to protect him). Teach energy conservation techniques. Discuss the importance of lifelong ART adherence post-recovery. Provide emotional support, addressing potential fears and stigma.

Patient Safety and Precautions:
• Watch out for confusion! Do not confuse protective isolation with airborne isolation. You are protecting the patient, not protecting others from the patient. PCP itself can be transmitted via droplets between immunocompromised individuals, but standard precautions are generally sufficient for healthcare workers.
• Monitor closely for acute respiratory distress. PCP can progress rapidly. Have emergency equipment (suction, intubation tray) readily available.
• Be aware of TMP-SMX (Bactrim) allergy, which is common. Report any rash or itching immediately.

Nursing Procedure & Medication Flow • Protective Isolation Setup: Private room > Sign on door > Dedicate equipment (e.g., stethoscope, BP cuff) to the room > Ensure negative pressure or HEPA filtration if available > Strict hand hygiene protocol > Visitor log and screening.
• IV TMP-SMX Administration: Check for sulfa allergy. Administer via IV infusion over 60-90 minutes as per protocol. Monitor for anaphylaxis (rare but serious): have epinephrine available. Assess IV site for phlebitis.
• Oxygen Therapy: Administer via nasal cannula or mask as ordered. Humidification may be needed. Monitor SpO2 continuously. Know signs of oxygen toxicity with prolonged high FiO2.

A Word from Your Senior Nurse "In the real world, caring for a patient this immunocompromised is a profound responsibility. That CD4+ count of 45 isn't just a number on a page—it means this person has almost no defense left. Your vigilance in infection control is their literal lifeline. Every time you wash your hands, every time you stop a visitor with a sniffle at the door, you are acting as their immune system. Never get complacent with precautions. And remember, behind the isolation gear is a person who is scared and isolated. Your kindness, your explanations, and your touch (with gloves on!) are powerful medicine too. Think like a nurse: protect, assess, intervene, educate, and care."