# A nurse is caring for a patient with community-acquired pneumonia who has been on antibiotic therapy for 2 weeks. Which nursing action demonstrates the highest priority for infection control and patient safety?

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> subject: Adult Health

## 문제

A nurse is caring for a patient with community-acquired pneumonia who has been on antibiotic therapy for 2 weeks. Which nursing action demonstrates the highest priority for infection control and patient safety?

## 보기

1. Placing the patient in a private room with standard precautions only
2. Wearing a surgical mask when entering the patient's room
3. Ensuring the patient wears a surgical mask during transport within the facility
4. Implementing airborne precautions with negative pressure isolation and N95 respirator use **✔ 정답**

**정답: 4**

## 해설

Community-acquired pneumonia is typically transmitted via large respiratory droplets, requiring droplet precautions. However, if the patient has been on antibiotic therapy for 2 weeks without improvement, the priority is to reassess the infection control measures. The highest priority is ensuring the patient wears a surgical mask during transport to prevent droplet spread, as this directly protects others during movement within the facility. Standard precautions alone are insufficient; wearing a surgical mask upon room entry is part of droplet precautions but not the highest priority action during transport. Airborne precautions are not indicated for community-acquired pneumonia unless specific pathogens like Mycobacterium tuberculosis are suspected.

## 심화 해설

Understanding the Clinical Scenario

The patient has been diagnosed with community-acquired pneumonia (CAP) and has been on antibiotic therapy for two weeks. The key clinical concern here is the prolonged duration of antibiotic treatment without resolution, which raises a red flag for a potential multidrug-resistant organism (MDRO) infection. The question asks for the highest priority nursing action for infection control and patient safety, requiring you to select the most appropriate transmission-based precaution based on a risk assessment.

Analyzing the Priority: Why Airborne Precautions?

The correct answer is implementing airborne precautions with negative pressure isolation and N95 respirator use. This is the highest priority because the patient’s clinical presentation—a respiratory infection unresponsive to standard antibiotics—must trigger a "worst-case scenario" safety protocol until a definitive diagnosis is made. The primary rule-out in this context is pulmonary tuberculosis (TB), an airborne disease. A patient with a persistent pneumonia despite broad-spectrum antibiotics fits the clinical picture of TB, which requires immediate airborne isolation to prevent healthcare-associated transmission [1].

The patient-centered framework for isolation prioritizes integrating pathogen-related factors with patient safety. Indiscriminate application of lower-level precautions for an undiagnosed respiratory illness can lead to outbreaks. Therefore, the empiric initiation of airborne precautions is a critical safety measure that balances resource utilization with the high consequence of a missed TB diagnosis [1].

Detailed Rationale for Each Option

Option 1: Placing the patient in a private room with standard precautions only.

This action is insufficient and represents a safety risk. Standard precautions, which include hand hygiene and glove use for potential contact with body fluids, do not protect against the airborne transmission of droplet nuclei. If the patient has active TB, standard precautions would expose healthcare workers and other patients to a serious infectious pathogen. The guideline for MDRO prevention emphasizes that isolation measures must be escalated based on the suspected pathogen’s transmission route to be effective .

Option 2: Wearing a surgical mask when entering the patient's room.

This action applies droplet precautions, not airborne precautions. A surgical mask is designed to block large respiratory droplets but does not provide a facial seal or filter very small airborne particles (droplet nuclei). A patient with a persistent pneumonia of unknown etiology could be infected with an airborne pathogen like Mycobacterium tuberculosis or, in a post-COVID era, a novel respiratory virus for which enhanced protection is warranted. Relying on a surgical mask would leave the nurse vulnerable to inhaling infectious aerosols .

Option 3: Ensuring the patient wears a surgical mask during transport within the facility.

While placing a surgical mask on the patient during transport is a correct component of droplet precaution protocols to contain secretions at the source, it is not the highest priority action. This measure is a secondary control strategy. The foundational, highest-priority intervention is to first place the patient in a negative pressure isolation room to control the environment and require the use of a properly fitted N95 respirator for all healthcare personnel entering the room. The patient wearing a mask does not negate the need for these primary engineering and personal protective equipment (PPE) controls .

Option 4: Implementing airborne precautions with negative pressure isolation and N95 respirator use.

This is the correct and highest-priority action. Airborne precautions are mandated for known or suspected infections transmitted by the airborne route. A patient with a community-acquired pneumonia that has not responded to 2 weeks of antibiotic therapy must be considered to have an infection with an MDRO or Mycobacterium tuberculosis until proven otherwise. The negative pressure room prevents contaminated air from escaping into the hallway, and the N95 respirator filters out at least 95% of airborne particles, protecting the nurse. This approach aligns with the post-COVID-era practice of normalizing enhanced respiratory protection during diagnostic uncertainty to prevent hospital-acquired outbreaks . The multisociety guidance for infection control reinforces that adherence to correct, risk-stratified precautions is fundamental to resident and staff safety .References (research sources)

- [1]Prioritizing isolation precautions: a patient-centered approach to infection prevention and control.Research articleAlp Meşe E, Carrara E, Tartari E, Mutters NT, Tsioutis C, Birgand G, Tacconelli E. (2025) · DOI: 10.1017/ash.2025.173

## 임상 시나리오

Empiric Airborne Isolation for Persistent PneumoniaRule Out Tuberculosis Until Proven Otherwise
For a patient with community-acquired pneumonia unresponsive to 2 weeks of antibiotics, the immediate priority is to initiate airborne precautions. This requires placing the patient in a negative pressure isolation room and using an N95 respirator for all entry.

The primary clinical concern is ruling out pulmonary tuberculosis (TB). A persistent respiratory infection despite broad-spectrum treatment fits the clinical picture of TB, an airborne disease requiring the highest level of respiratory protection to prevent healthcare-associated transmission.

CautionDo not downgrade to droplet precautions (surgical mask) or standard precautions only. A surgical mask on the patient during transport is a droplet measure and insufficient for suspected airborne pathogens. Empiric airborne isolation must be maintained until TB is ruled out by negative sputum smears or nucleic acid amplification tests.

## 핵심 개념

- **Airborne Precautions** — Infection control measures used for diseases transmitted via small droplet nuclei (
- **Community-Acquired Pneumonia (CAP)** — An acute lung infection acquired outside of a healthcare setting, commonly caused by Streptococcus pneumoniae, but unresponsive cases require ruling out tuberculosis.
- **N95 Respirator** — A particulate-filtering facepiece respirator that filters at least 95% of airborne particles, required for airborne precautions to protect the wearer from inhalation hazards.
- **Negative Pressure Isolation** — A single-occupancy room with ventilation that maintains lower air pressure inside than outside, preventing contaminated air from escaping into corridors.
- **Multidrug-Resistant Organism (MDRO)** — Microorganisms, predominantly bacteria, that are resistant to one or more classes of antimicrobial agents, often requiring contact precautions in addition to standard precautions.

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