A nurse is caring for a patient with methicillin-resistant Staphylococcus aureus (MRSA) pneumonia in the intensive care unit. Which infection control measure should the nurse implement first when entering the patient's room?

For MRSA pneumonia on contact precautions, donning gloves and gown before entering the room is the first priority to prevent transmission via direct or indirect contact. Other options are either patient-specific interventions or compromise infection control.

Core Nursing Explanation Key Concept Analysis: This question tests the application of Transmission-Based Precautions in a high-risk clinical setting. The patient has Methicillin-resistant Staphylococcus aureus (MRSA) pneumonia. MRSA is a multi-drug resistant organism (MDRO) primarily spread through Contact Transmission (direct contact with the patient or indirect contact with contaminated surfaces/equipment). The "first" action upon entering the room refers to the immediate, priority step in the sequence of donning personal protective equipment (PPE) to protect the healthcare worker and prevent environmental contamination.

Answer Rationale: Key Point! For patients on Contact Precautions, the correct sequence is to perform Hand Hygiene, then don Gown and Gloves before entering the patient's environment. This is the first and most critical infection control measure. The gown protects clothing/uniform from contamination, and gloves protect the hands. Since MRSA pneumonia involves the respiratory tract, some facilities may also require a mask for the nurse if there is a risk of splash from respiratory secretions, but the foundational, non-negotiable first step for MRSA is contact precautions (gown and gloves).

Distractor Analysis:
Watch out for confusion! Option ②, placing a surgical mask on the patient, is a component of Droplet Precautions (for pathogens like influenza). For MRSA pneumonia, the primary route is contact, not droplet. A mask on the patient is not the standard first action for MRSA.
Option ③, keeping the door open, directly violates the principles of Airborne Infection Isolation (which requires a negative pressure room with a closed door) and general infection control by potentially allowing pathogens to spread into the corridor. It is incorrect and unsafe.
Option ④, administering antibiotics immediately, is a therapeutic intervention, not an infection control measure. While important, it does not protect the nurse or others from transmission and should only be done after appropriate PPE is donned.

Related Concepts: Understanding the hierarchy of infection control: Standard Precautions apply to all patients. Transmission-Based Precautions (Contact, Droplet, Airborne) are added based on the specific pathogen's mode of spread. The sequence of PPE donning and doffing is a critical nursing skill to prevent self-contamination. Concept Summary

Concept	Key Points
Contact Precautions	Used for pathogens spread by direct/indirect contact (e.g., MRSA, VRE, C. diff). Requires gown and gloves upon room entry.
Droplet Precautions	Used for pathogens spread by large droplets from cough/sneeze (e.g., influenza, pertussis). Requires surgical mask upon room entry.
Airborne Precautions	Used for pathogens spread by small airborne nuclei (e.g., TB, measles). Requires N95 respirator and a negative pressure room.
PPE Donning Sequence	1. Perform hand hygiene. 2. Gown. 3. Mask/respirator. 4. Eye protection. 5. Gloves.
PPE Doffing Sequence	1. Gloves. 2. Gown. 3. Perform hand hygiene. 4. Eye protection. 5. Mask/respirator. 6. Perform hand hygiene.

Side-by-Side Comparison!

Precaution Type	Pathogen Examples	Required PPE (for HCW)	Room Type
Contact	MRSA, VRE, C. diff, RSV	Gown & Gloves	Private or cohort
Droplet	Influenza, Pertussis, Meningitis	Surgical Mask	Private or cohort (door may be open)
Airborne	TB, Measles, Chickenpox	N95 Respirator (or higher)	Negative Pressure (AIIR), door closed

Anatomy, Physiology & Pharmacology Points • Pathophysiology: MRSA is a strain of *Staphylococcus aureus* resistant to beta-lactam antibiotics (methicillin, oxacillin). It produces enzymes (e.g., penicillinase) and alters penicillin-binding proteins (PBPs). Pneumonia caused by MRSA presents similarly to other bacterial pneumonias (fever, cough, purulent sputum) but is more challenging to treat. • Pharmacology: First-line treatment for MRSA pneumonia often includes intravenous antibiotics like Vancomycin or Linezolid. Nursing considerations include monitoring trough levels for vancomycin and assessing for side effects like "Red Man Syndrome" or nephrotoxicity. Memory Tips • Acronym: For PPE donning sequence: Get My Gear Gloves (Gown, Mask, Goggles, Gloves). Remember, hand hygiene is first and between steps! • Association: Think "Contact" = "Cover your Clothes" (Gown) and "Cover your Hands" (Gloves). High-Frequency NCLEX Topics Infection control is a High Yield topic. The NCLEX frequently tests: 1. Prioritizing infection control actions (e.g., what to do first). 2. Selecting appropriate PPE for a given disease. 3. The correct sequence for donning and doffing PPE. 4. Patient teaching for home-based infection control (e.g., for family members). Watch Out for Question Variations! • Instead of "what should the nurse do first?", the question might ask: "Which action by the nursing assistant requires intervention?" (e.g., entering an MRSA room without a gown). • The scenario could change the disease: "A patient with pulmonary tuberculosis..." The correct first action would then be to don an N95 respirator. • It could be a "select all that apply" question listing multiple PPE items for a specific precaution.

Nursing Clinical Practice Guide Clinical Scenario: You are assigned to Mr. Jones, a 68-year-old in the ICU with ventilator-associated pneumonia (VAP) confirmed as MRSA. The room has a Contact Precautions sign on the door.

Nursing Intervention Strategy: 1. Assessment & Planning: Before entering, gather all necessary supplies (medications, assessment tools, linens) to minimize exits and entries. Check the PPE supply station outside the room. 2. Implementation: • Perform hand hygiene with alcohol-based rub. • Don a clean isolation gown, tying securely at neck and waist. • Don gloves, pulling them over the gown cuffs. • Enter the room and provide care. • Before exiting, remove gloves and gown inside the room, discarding in the designated biohazard container. • Perform hand hygiene immediately after removing PPE and before touching the door handle. 3. Patient Education & Evaluation: Educate the patient (if alert) and family on the reason for precautions. Evaluate the effectiveness of isolation by monitoring for any new transmissions of MRSA within the unit.

Patient Safety and Precautions: • Dedicated Equipment: Use a dedicated stethoscope, blood pressure cuff, and thermometer that remain in the room. • Environmental Cleaning: High-touch surfaces must be cleaned and disinfected frequently with an EPA-approved disinfectant effective against MRSA. • Visitors: Instruct visitors on proper PPE use and hand hygiene. Nursing Procedure & Medication Flow When administering IV vancomycin to this patient: 1. Don appropriate PPE (gown, gloves) before entering. 2. Verify the order and check the patient's allergy status. 3. Assess IV site patency. 4. Administer the infusion over at least 60 minutes (to reduce risk of Red Man Syndrome). 5. Monitor vital signs during infusion. 6. Schedule vancomycin trough levels to be drawn 30 minutes before the fourth dose. 7. After administration, dispose of supplies in the room's biohazard container, doff PPE, and perform hand hygiene. A Word from Your Senior Nurse "In the real world of nursing, infection control isn't just a policy—it's a sacred duty to protect your patients, yourself, and your colleagues. I've seen outbreaks halted by meticulous PPE use and hand hygiene. When you see that isolation sign, don't think of it as a barrier, but as your suit of armor. On the NCLEX, they're testing your foundational knowledge of safety. In practice, this knowledge saves lives. Always ask yourself: 'Am I the vector, or am I the stopgap?' Be the stopgap."