# A nurse is caring for a patient with suspected Clostridium difficile infection in a medical unit. Which action demonstrates the most appropriate use of personal protective equipment (PPE) for this situation?

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> subject: Infectious Diseases

## 문제

A nurse is caring for a patient with suspected Clostridium difficile infection in a medical unit. Which action demonstrates the most appropriate use of personal protective equipment (PPE) for this situation?

## 보기

1. Remove gloves and perform hand hygiene with soap and water after patient contact, then remove gown and other PPE. **✔ 정답**
2. Use alcohol-based hand sanitizer immediately after removing gloves and before removing the gown
3. Remove the gown first, then gloves, followed by hand hygiene with alcohol-based sanitizer
4. Remove all PPE simultaneously and perform hand hygiene with alcohol-based hand rub

**정답: 1**

## 해설

Soap and water hand hygiene is critical after glove removal for C. difficile, as alcohol-based sanitizers are ineffective against spores.

## 심화 해설

Correct Answer: 1. Remove gloves and perform hand hygiene with soap and water after patient contact, then remove gown and other PPE.

Rationale: The correct sequence for removing personal protective equipment (PPE) is critical to prevent self-contamination, which is a primary cause of occupational exposure to pathogens like Clostridium difficile (C. diff). The doffing process must follow a specific, stepwise order to contain contaminants on the outermost surfaces of the equipment. Gloves are considered the most contaminated piece of PPE. Therefore, they must be removed first, along with the gown, in a bundled manner that turns the contaminated surfaces inward. Immediately after removing gloves, hand hygiene must be performed. For C. diff, this is uniquely critical because the pathogen forms spores. C. diff spores are highly resistant to the bactericidal effects of alcohol. Alcohol-based hand rubs do not effectively kill or inactivate these spores. The mechanical action of washing with soap and water is essential to physically remove spores from the hands. Performing hand hygiene immediately after glove removal, before touching other surfaces or the face, is a cornerstone of infection prevention. The remaining PPE, such as the gown, is then removed, followed by a final hand hygiene step. This sequence directly addresses the high risk of error during doffing, which is a significant contributor to self-contamination among healthcare workers [2]. Structured training and step-by-step guidance systems are proven to reduce these errors and improve PPE removal accuracy, underscoring the importance of a deliberate, ordered process [1,3].

In-Depth Analysis of Options

Why Option 1 is Correct

This option outlines the only sequence that addresses both the general principle of PPE removal and the specific challenge of C. diff spores. The process begins with removing the most contaminated items (gloves) and immediately follows with the only effective hand hygiene method for spore-forming organisms: soap and water. Delaying hand hygiene or using an incorrect method creates a direct pathway for pathogen transmission. The subsequent removal of the gown and other PPE prevents recontamination of the now-clean hands. This systematic approach minimizes the risk of self-contamination, a risk that is well-documented in the literature. Studies show that errors in the doffing sequence are a primary mechanism for healthcare worker contamination, and AI-assisted training programs are being developed specifically to reinforce this exact order to prevent breaches in technique [2].

Why Option 2 is Incorrect

Using an alcohol-based hand sanitizer is a critical error when caring for a patient with suspected C. diff infection. C. diff exists in a hardy spore form, and alcohol does not kill spores. The mechanical friction and rinsing action of soap and water are required to dislodge and remove them from the skin. Using alcohol-based sanitizer would leave viable spores on the hands, creating a false sense of security and a high risk of transmitting the infection to the patient, other patients, or environmental surfaces. While this option correctly places hand hygiene after glove removal, the choice of agent is inappropriate for the clinical scenario.

Why Option 3 is Incorrect

This option contains two significant errors. First, the sequence of removing the gown before the gloves is incorrect. The gloves are the most contaminated items, and removing the gown first increases the risk of contaminating the hands and wrists during the process, as the healthcare worker must touch the contaminated gown surface with their gloved hands to unfasten it. The correct method is to remove gloves and gown together as a single unit, turning them inside out to contain the contamination. Second, the use of alcohol-based sanitizer is ineffective against C. diff spores, as explained above.

Why Option 4 is Incorrect

Removing all PPE simultaneously is a dangerous practice that dramatically increases the risk of self-contamination. The doffing process requires a deliberate, step-by-step sequence to ensure that contaminated surfaces do not contact the healthcare worker's skin, mucous membranes, or clothing. A simultaneous removal would make it nearly impossible to control the contaminated surfaces, leading to a high probability of exposure. Furthermore, this option repeats the error of using an alcohol-based hand rub, which is ineffective against the C. diff spore. The high physiological and psychological stress levels healthcare workers can experience while wearing PPE, as measured by heart rate variability, make adherence to a strict, practiced protocol even more essential to prevent lapses in safety .References (research sources)

- [2]Artificial intelligence-assisted personal protective equipment donning and doffing training for health professions students and healthcare workers: a scoping review.Research articleLv Y, Cai M, Xiang Q, Wang P. (2025) · DOI: 10.1186/s12909-025-08498-5

## 임상 시나리오

C. difficile Infection Control: PPE DoffingWhy soap and water are non-negotiable
For patients with suspected or confirmed C. difficile, the doffing sequence is critical. Remove gloves first as they are the most contaminated item.

Immediately after removing gloves, perform hand hygiene with soap and water. The mechanical friction is essential to physically remove spores, which are not killed by alcohol.

CautionNever use alcohol-based hand rub for C. difficile. It is ineffective against spores and creates a false sense of security, increasing transmission risk.

## 핵심 개념

- **Clostridioides difficile** — A spore-forming, gram-positive anaerobic bacillus causing antibiotic-associated diarrhea and colitis; spores are resistant to alcohol.
- **PPE Doffing Sequence** — The correct order for removing PPE to minimize contamination risk: gloves first, then face shield/goggles, gown, and mask/respirator last.
- **Hand Hygiene for C. difficile** — Soap and water must be used instead of alcohol-based hand rubs because the friction and rinsing physically remove spores from hands.
- **Contact Precautions** — Infection prevention measures used for patients with known or suspected infections that are spread by direct or indirect contact.

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