A nurse is caring for multiple patients with different infec… | 마이메르시 MyMerci
Infectious Diseases
문제

A nurse is caring for multiple patients with different infectious diseases. Which patient requires airborne precautions in addition to standard precautions?

해설
Pulmonary tuberculosis requires airborne precautions because Mycobacterium tuberculosis is transmitted through airborne droplet nuclei. Other options require contact or droplet precautions.

심화 해설

Core Nursing Explanation Key Concept Analysis: This question tests your knowledge of Transmission-Based Precautions, specifically identifying which infectious diseases require Airborne Precautions. Standard precautions are used for all patients. Transmission-based precautions (Contact, Droplet, Airborne) are added based on the specific pathogen's mode of transmission. Airborne precautions are required for pathogens that can be transmitted via airborne droplet nuclei (tiny particles < 5 microns) that can remain suspended in the air and travel long distances.

Answer Rationale: Key Point! Pulmonary tuberculosis (TB) is caused by Mycobacterium tuberculosis. This bacterium is transmitted via airborne droplet nuclei generated when a person with active pulmonary TB coughs, sneezes, or speaks. These tiny particles can be inhaled by others, leading to infection. Therefore, in addition to standard precautions, Airborne Precautions are mandatory. This includes placing the patient in a negative pressure isolation room and requiring healthcare workers to wear a fit-tested N95 respirator or higher-level protection.

Distractor Analysis:
Watch out for confusion! Option ①: Methicillin-resistant Staphylococcus aureus (MRSA) is primarily spread through direct contact (touching the patient or contaminated surfaces) or indirect contact via contaminated equipment. It requires Contact Precautions, not airborne.
Option ②: Clostridium difficile (C. diff) causes diarrhea and is spread via the fecal-oral route through contact with contaminated surfaces or hands. Spores are resistant to alcohol-based hand sanitizers. It requires Contact Precautions with an emphasis on soap and water for hand hygiene.
Option ③: Influenza A is spread mainly by large respiratory droplets (generated by coughing/sneezing) that travel short distances (usually < 3 feet/1 meter) and land on the mucous membranes of a nearby person. It requires Droplet Precautions (surgical mask), not airborne.

Related Concepts: Understanding the distinction between Contact, Droplet, and Airborne precautions is fundamental for infection control. Key factors are particle size, travel distance, and the required personal protective equipment (PPE). Always remember the "Big 3" for Airborne Precautions: Tuberculosis (TB), Measles (Rubeola), and Varicella (Chickenpox) in a non-immune host.

Concept Summary
Precaution TypePathogen ExamplesTransmission ModeKey PPE/Interventions
AirborneTB, Measles, VaricellaAirborne droplet nuclei (5 microns, travel

임상 시나리오

Nursing Clinical Practice Guide Clinical Scenario: You are admitting Mr. Chen, a 58-year-old man with a persistent cough, night sweats, and weight loss. A chest X-ray shows cavitary lesions, and sputum smears are pending for acid-fast bacilli (AFB). The physician suspects active pulmonary tuberculosis.

Nursing Intervention Strategy:
1. Assessment & Immediate Action: Upon suspicion, immediately place the patient in a negative pressure isolation room. Don a fit-tested N95 respirator before entering. Post "Airborne Precautions" signs.
2. Patient Education & Support: Explain the reason for isolation to reduce anxiety. Instruct the patient to cover mouth and nose with a tissue when coughing. Ensure proper disposal of tissues in a no-touch receptacle.
3. Monitoring & Evaluation: Monitor for respiratory status, sputum production, and adherence to respiratory hygiene. Evaluate the effectiveness of isolation by ensuring all staff and visitors comply with PPE protocols.

Patient Safety and Precautions: Limit transport of the patient. If transport is essential, the patient must wear a surgical mask. Anyone transporting the patient who is not immune (e.g., to measles or varicella) should not participate if the diagnosis is uncertain. Remember, Key Point! The door to the negative pressure room must remain closed to maintain the pressure gradient.

Nursing Procedure & Medication Flow Procedure for Donning PPE for Airborne Precautions: 1. Perform hand hygiene. 2. Put on the N95 respirator and perform a user seal check. 3. Put on gown (if contact with patient or environment is anticipated). 4. Put on gloves.
Medication Administration: TB medications are often given in combination and can have significant side effects (e.g., hepatotoxicity from Isoniazid, orange bodily fluids from Rifampin, optic neuritis from Ethambutol). Administer with food if GI upset occurs and monitor liver function tests.
A Word from Your Senior Nurse "In the real world, infection control is everyone's responsibility. When you see that 'Airborne Precautions' sign, it's not a suggestion—it's a critical safety protocol. I've seen new nurses feel rushed and skip the seal check on their N95. Don't. That mask is your primary barrier. Taking those extra 10 seconds to ensure a proper fit protects you, your other patients, and your own family. On the NCLEX, they are testing your foundational knowledge to keep patients and the healthcare team safe. Always ask yourself: 'How is this bug spread?' The answer to that question tells you everything about the precautions needed."

핵심 개념

  • Airborne Precautions — Infection control measures for diseases transmitted via airborne droplet nuclei (
  • Mycobacterium tuberculosis — The bacterium that causes tuberculosis (TB). It is an acid-fast bacillus (AFB) transmitted via airborne droplet nuclei from the respiratory tract of a person with active pulmonary disease.
  • Negative Pressure Isolation Room — A ventilation system that maintains a lower air pressure inside the room than in the surrounding corridors, preventing contaminated air from escaping when the door is opened. Essential for airborne infection isolation.
  • N95 Respirator — A personal protective device designed to achieve a very close facial fit and efficient filtration of airborne particles. It must be fit-tested to form a seal around the nose and mouth, protecting the wearer from inhaling infectious aerosols.
  • Transmission-Based Precautions — The second tier of infection prevention, used in addition to Standard Precautions for patients with known or suspected infections. They are categorized based on the route of transmission: Contact, Droplet, and Airborne.

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