3.4 Hand Hygiene Standards (WHO 5 Moments) & PPE Donning/Doffing Sequences
Key Takeaways
- Hand hygiene is the single most effective intervention to prevent healthcare-associated infections, governed by the WHO '5 Moments for Hand Hygiene' framework.
- Alcohol-Based Hand Rub (ABHR) containing 60–95% alcohol is preferred for routine antisepsis, but soap-and-water washing is mandatory when hands are visibly soiled, after restroom use, and when caring for C. diff or Norovirus patients.
- Wearing gloves does not substitute for hand hygiene; micro-perforations develop during use, and hands must be sanitized immediately upon glove removal.
- The CDC Donning sequence is Gown -> Mask/Respirator -> Goggles/Face Shield -> Gloves; the Doffing sequence is Gloves -> Goggles/Face Shield -> Gown -> Mask/Respirator (or combined Glove & Gown).
- Respirators (N95) used for Airborne Precautions must always be removed outside the patient room after the door is closed, followed by immediate hand hygiene.
3.4 Hand Hygiene Standards (WHO 5 Moments) & PPE Donning/Doffing Sequences
Hand hygiene and the precise use of Personal Protective Equipment (PPE) are the foundational pillars of healthcare worker protection and cross-contamination prevention. For Environmental Services professionals, adherence to hand hygiene moments and aseptic donning and doffing sequences prevents the EVS technician from becoming an active vector of disease transmission.
1. The WHO "5 Moments for Hand Hygiene" Applied to EVS
The World Health Organization (WHO) and CDC define the 5 Moments for Hand Hygiene, which outline the exact clinical junctures where hand antisepsis must be performed. Environmental services operations adapt these moments directly to environmental cleaning workflows.
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| THE WHO 5 MOMENTS FOR HAND HYGIENE (EVS WORKFLOW) |
| |
| MOMENT EVS CLINICAL / OPERATIONAL SCENARIO |
| ---------------------- ------------------------------------------------------------------------ |
| 1. BEFORE TOUCHING Before crossing the room threshold to begin cleaning; before touching |
| PATIENT SURROUNDINGS overbed tables, bed controls, or entering patient care zones. |
| |
| 2. BEFORE CLEAN / Before handling clean linen, restocking clean glove boxes, refilling |
| ASEPTIC PROCEDURE soap dispensers, or preparing fresh disinfectant microfiber buckets. |
| |
| 3. AFTER BODY FLUID Immediately after handling soiled linen, emptying commodes/urinals, |
| EXPOSURE RISK cleaning blood/body fluid spills, or handling biohazard red bags. |
| |
| 4. AFTER TOUCHING After direct contact with a patient (e.g., assisting a patient who grabs |
| A PATIENT an arm, helping reposition a fallen item for a patient). |
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| 5. AFTER TOUCHING Immediately upon removing gloves and exiting a patient room; after |
| PATIENT SURROUNDINGS touching door hardware, call pendants, or high-touch surfaces. |
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2. Alcohol-Based Hand Rub (ABHR) vs. Soap and Water
Healthcare hand hygiene relies on two distinct modalities: chemical antisepsis via alcohol-based formulations and mechanical washing via soap and water.
| Modality | Formulation & Mechanism | Clinical Indications | Application Technique & Dwell Time |
|---|---|---|---|
| Alcohol-Based Hand Rub (ABHR) | 60% to 95% Ethanol or Isopropanol; denatures microbial proteins and dissolves lipid envelopes. | Preferred method for routine decontamination in all clinical situations when hands are NOT visibly soiled. | Apply 3–5 mL (1–2 pumps) to palm of hand; rub all surfaces of hands, fingers, web spaces, and wrists vigorously until completely dry (minimum 15–20 seconds). |
| Soap and Water Handwashing | Plain or antimicrobial soap; surfactants emulsify lipids and soils to mechanically detach microbes. | MANDATORY INDICATIONS:<br>1. Hands visibly soiled with blood, body fluids, or dirt.<br>2. After caring for/cleaning rooms of C. diff or Norovirus patients.<br>3. After using the restroom.<br>4. Before eating or preparing food. | Wet hands with warm water; apply soap; scrub vigorously for at least 20 seconds covering all surfaces, nails, and thumbs; rinse under running water; dry with paper towel; turn off faucet with towel. |
[!IMPORTANT] Why ABHR Fails Against Spores: Alcohol-based hand rubs do not penetrate the exosporium or proteinaceous spore coat of Clostridioides difficile. In fact, alcohol dehydrates and fixes the spore coat. Soap and water does not chemically kill the spore, but the physical surfactants, lathering friction, and running water mechanically detach the spores from the epidermal ridges and rinse them down the drain.
3. Personal Protective Equipment (PPE) Standards
1. Medical & Protective Gloves
- Material Science:
- Nitrile Gloves: The healthcare industry standard. Synthetic copolymer with superior chemical resistance, puncture resistance, and zero risk of Type I latex allergic reactions. Highly compatible with disinfectants.
- Vinyl (PVC) Gloves: Inexpensive but prone to high rates of micro-perforations, tearing, and chemical breakdown under organic solvent exposure. Unsuitable for high-risk cleaning or bloodborne pathogen contact.
- Latex Gloves: Natural rubber; excellent tactile fit but poses severe latex sensitization and allergy risks to healthcare workers and patients.
- Crucial Glove Principles:
- Gloves are single-use disposable items; they must never be washed, disinfected with ABHR, or re-donned.
- Gloves develop microscopic pores during usage; hand hygiene is mandatory immediately after glove removal.
- Change gloves between dirty and clean tasks within the same patient room (e.g., after cleaning the toilet before changing clean bed linens).
2. Isolation Gowns & Liquid Barrier Standards (ANSI/AAMI PB70)
Isolation gowns protect the technician's clothing and forearms from chemical saturation and pathogen transfer. Gowns are classified by liquid barrier performance under ANSI/AAMI PB70:
- Level 1 (Minimal Barrier): Basic visitor gowns; minimal fluid resistance.
- Level 2 (Low Barrier): Daily patient room cleaning with low fluid exposure risk.
- Level 3 (Moderate Barrier): Terminal discharge cleaning, isolation room decontamination, handling saturated linens, or blood spill remediation.
- Level 4 (High Barrier): Viral hemorrhagic fevers (Ebola), severe surgical procedures, continuous fluid immersion.
3. Facial & Respiratory Protection
- Fluid-Resistant Surgical Masks: Protect mucous membranes of the nose and mouth from large respiratory droplets, liquid splatters, and chemical splashes.
- Eye Protection (Goggles & Face Shields): Must provide peripheral eye coverage. Standard personal eyeglasses do not qualify as eye protection because they lack side shields.
- N95 Filtering Facepiece Respirators: Certified by NIOSH to filter ≥95% of airborne particles down to 0.3 micrometers. Requires:
- Annual OSHA-mandated Fit-Testing (qualitative with Bitrex/Saccharin or quantitative with particle counters).
- Mandatory User Seal Check (positive and negative pressure check) performed by the wearer every single time the respirator is donned.
- Powered Air-Purifying Respirator (PAPR): Used by individuals with facial hair or structural facial variations who cannot achieve an airtight seal on an N95.
4. CDC Donning & Doffing Sequences
The sequence of donning and doffing PPE is critical. The outside surfaces of PPE become heavily contaminated during cleaning; improper doffing is the primary cause of healthcare worker self-contamination.
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| CDC PPE DONNING & DOFFING PROTOCOLS |
| |
| DONNING SEQUENCE (PUTTING ON) DOFFING SEQUENCE (TAKING OFF) |
| *Location: Outside Room / Anteroom* *Location: Inside Room / Doorway (Mask Out)* |
| |
| 1. GOWN 1. GLOVES (Most Contaminated Item) |
| - Fully cover torso from neck to knees - Grasp outside with opposite gloved hand |
| - Fasten in back of neck and waist - Peel off inside out; hold in hand |
| - Slide bare finger under wrist; peel off |
| 2. MASK OR RESPIRATOR |
| - Secure ties or elastics at crown/neck 2. GOGGLES OR FACE SHIELD |
| - Fit flexible band to nose bridge - Handle by headband or ear pieces |
| - Perform User Seal Check (N95) - Lift away from face without touching front|
| |
| 3. GOGGLES OR FACE SHIELD 3. GOWN |
| - Place over eyes/face and adjust fit - Unfasten ties; pull away from neck/shoulders|
| - Turn inside-out and roll into a bundle |
| 4. GLOVES |
| - Extend to cover wrist cuff of gown 4. MASK OR RESPIRATOR |
| - Touch only bottom then top ties/straps |
| - Remove AFTER exiting room (for Airborne) |
| |
| 5. IMMEDIATE HAND HYGIENE |
| - Wash with soap/water or use ABHR |
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Alternative Combined Doffing Method (Gown and Gloves Together):
Under CDC guidelines, an acceptable and widely practiced alternative doffing method is the Simultaneous Gown-and-Glove Removal:
- Grasp the gown front at the chest and break the neck and waist ties.
- Pull the gown forward and peel the sleeves down the arms, rolling the contaminated gown inside-out while pulling the gloves off inside the sleeves in a single continuous bundle.
- Discard the bundled gown and gloves directly into the waste receptacle.
- Remove goggles/face shield from the back.
- Exit room and remove mask/respirator from the rear straps.
- Perform immediate hand hygiene.
According to CDC and WHO guidelines, in which clinical situation is alcohol-based hand rub (ABHR) strictly contraindicated, making soap-and-water handwashing mandatory?
What is the correct CDC-recommended sequence for donning Personal Protective Equipment (PPE) prior to entering an isolation room?
When doffing PPE after cleaning an Airborne Infection Isolation Room (AIIR) for a patient with tuberculosis, where and when should the N95 filtering facepiece respirator be removed?
Which statement regarding glove usage and hand hygiene in healthcare environmental services is correct?