Safety and Infection Control: Practice Questions & Explanations

Hand hygiene is the single most important intervention to prevent healthcare-associated infections (HAIs). CDC guidelines specify when to perform hand hygiene: before patient contact, before aseptic procedures, after body fluid exposure risk, after patient contact, and after contact with patient surroundings (the 'Five Moments' from WHO). Alcohol-based hand rubs are preferred for routine hand hygiene; soap and water is required when hands are visibly soiled or after caring for clients with C. difficile (the spores resist alcohol). Hand hygiene is more important than glove use — gloves are an addition, not a substitute. Hands must be cleaned before donning gloves and after removing them. Despite being simple and effective, hand hygiene compliance among healthcare workers is often poor (around 40-60%), making education and observation critical. Nurses model hand hygiene for other staff.

Airborne precautions are required for diseases transmitted by small droplet nuclei (under 5 microns) that remain suspended in the air for extended periods. Examples: tuberculosis (TB), measles, varicella (chickenpox), disseminated zoster. Requirements: (1) Private negative-pressure room (Airborne Infection Isolation Room or AIIR) with negative airflow and HEPA filtration or external venting; (2) N95 or higher respirator (fit-tested) for all caregivers; (3) Mask on the client during transport outside the room; (4) Door kept closed at all times. Droplet precautions are for larger droplets (greater than 5 microns) that travel only 3-6 feet: surgical mask within 3 feet of client; examples include influenza, pertussis, meningococcal disease. Contact precautions are for transmission by direct or indirect contact: gowns and gloves for room entry; examples include C. diff, MRSA, VRE. Standard precautions apply to all clients regardless of diagnosis.

PPE sequence is critical to prevent self-contamination. Donning (clean to contaminated): (1) Perform hand hygiene; (2) Gown — tied at neck and waist; (3) Mask or respirator — secure with ties or elastic; (4) Goggles or face shield — over the eyes; (5) Gloves — extending over gown cuffs. Doffing (contaminated to clean) is reversed and most critical because items are now contaminated: (1) Gloves — remove first because they are most contaminated; (2) Goggles or face shield — handle by the strap behind the head, not the front; (3) Gown — untie and roll inward, contaminated side in; (4) Mask or respirator — handle by ties or elastic, not the front; (5) Perform hand hygiene. The mask/respirator is removed last because it protected the airway throughout. Hand hygiene is performed between steps when the next item must be handled cleanly. CDC offers detailed posters for clinical reference.

The Joint Commission's National Patient Safety Goals require using at least two patient identifiers before any procedure, medication administration, blood transfusion, specimen collection, or any other patient-specific intervention. Acceptable identifiers: full name (first and last), date of birth, medical record number, government-issued ID. Room number is NEVER acceptable — clients move rooms; mistakes happen with room assignments; and confused clients in shared rooms can lead to errors. Recognition by face is also not acceptable, even for clients you know well — fatigue, similar appearances, and changing client census all create error risk. The wristband is checked, the client is asked (when able) to state their name and date of birth, and these are matched to the medication record or procedure consent. For unconscious or non-verbal clients, identification still uses the wristband against the chart.

Fall prevention is multifactorial and individualized. Standard practice: (1) Assess fall risk on admission and at regular intervals using a validated tool (Morse Fall Scale, STRATIFY, Hendrich II); (2) Identify specific risk factors — age, history of falls, gait/balance issues, vision problems, medications (especially benzodiazepines, opioids, anticholinergics), cognitive impairment, incontinence; (3) Implement individualized interventions: bed in low position; call light within reach; non-slip footwear; scheduled toileting (proactive bathroom visits before urgency); clear pathways; adequate lighting; bed alarms for high-risk clients; one-to-one observation when needed; environmental safety. Side rails are not unconditional fall prevention — full side rails can be a form of restraint and have led to entrapment injuries. Restraints are not first-line and require physician order, specific indications, and frequent reassessment. Family involvement helps. Reassess after every fall and modify the plan.

Clostridioides difficile (C. diff) is unique among healthcare pathogens because it forms spores that are resistant to alcohol-based hand sanitizers. Alcohol does not kill C. diff spores. Hand hygiene after caring for C. diff clients (or any patient with suspected infectious diarrhea) must use soap and water, with vigorous mechanical washing to physically remove the spores. The CDC and WHO both specifically recommend this. Contact precautions are required for C. diff clients: gowns and gloves for room entry, dedicated equipment (BP cuffs, stethoscopes), private room or cohorting with other C. diff clients. Environmental cleaning requires sporicidal disinfectants (bleach or specific EPA-registered products) rather than standard quaternary ammonium disinfectants which do not kill spores. C. diff is one of the most common healthcare-associated infections and requires diligence to prevent transmission.

RESTRAINT ALTERNATIVES must be exhausted before physical restraints are applied. Restraints are a last resort because they carry significant risks: increased agitation, aspiration, pressure injuries, psychological trauma, and death. JOINT COMMISSION and CMS standards require documentation that alternatives were tried. ALTERNATIVES TO RESTRAINTS: (1) REORIENTATION: Speak calmly and frequently; orient to place, time, and situation; explain what's happening; (2) ENVIRONMENT SAFETY: Bed in lowest position; side rails up (usually 2-3 rails, not all four — 4 rails = restraint in many states); remove items the confused client could harm themselves with; (3) CALL LIGHT: Ensure it's accessible and the client knows how to use it; (4) CLOSE MONITORING: Move the client closer to the nurses' station; increase check frequency; (5) ADDRESSING UNMET NEEDS: Pain (confusion often stems from inadequately managed pain); bladder (urge to void causes many fall attempts); hunger/thirst; sleep deprivation; (6) FAMILY PRESENCE: A familiar face and voice significantly reduces confusion-driven agitation; (7) ACTIVITY: Appropriate exercise during the day reduces nighttime restlessness; (8) REMOVE TRIGGERS: IV lines, catheters, tubes can be confused as irritants and removed — consider whether each can be covered, secured, or removed; (9) SITTERS: Trained patient companion who stays with client. IF RESTRAINTS ARE REQUIRED: Specific medical order required; must specify type, location, duration; reassess every 2 hours (release, reposition, toilet, circulation check); document continuously.

HAND HYGIENE is the single most effective intervention to prevent healthcare-associated infections (HAIs). The 5 MOMENTS FOR HAND HYGIENE (WHO standard): BEFORE touching a patient; BEFORE a clean/aseptic procedure; AFTER body fluid exposure risk; AFTER touching a patient; AFTER touching the patient's surroundings. CORRECT HANDWASHING TECHNIQUE: (1) Wet hands with water (temperature doesn't matter — warm is comfortable, hot doesn't kill more organisms); (2) Apply soap; (3) Lather and SCRUB for at least 20 seconds — the 20-second minimum is what the CDC recommends; many people scrub for only 6-10 seconds; count by singing 'Happy Birthday' twice; (4) Cover ALL surfaces: palms (laced together), backs of hands, between fingers, thumbs (often missed — circular motion around each thumb), fingertips and under nails (fingertip scrubbing against opposite palm), wrists; (5) Rinse thoroughly under running water; (6) Dry with a single-use paper towel; (7) Use the paper towel to turn off the faucet to avoid recontamination. ALCOHOL-BASED HAND RUB (ABHR): Preferred for most routine patient contacts (faster, less skin damage, more compliance); 3 mL rubbed until dry; same coverage of all surfaces required; NOT appropriate for C. difficile (spores are not killed by alcohol — must use soap and water for C. diff patients). NAILS: Natural nails should be kept short (less than 1/4 inch); artificial nails are prohibited in most clinical settings because they harbor organisms; nail polish that is chipped or cracked is also prohibited.

HAI RISK FACTORS are additive — the more risk factors present, the higher the risk. The 68-year-old in Option B has multiple major risk factors compounding each other. RISK FACTOR ANALYSIS: AGE (>65): Immune senescence — reduced immune response; less reserve to fight infection; thinner, more fragile skin; DIABETES: Impaired neutrophil function; poor wound healing; hyperglycemia creates a substrate for bacterial growth; peripheral vascular disease reduces tissue perfusion; FOLEY CATHETER (CAUTI risk): Each day of catheterization increases UTI risk by 3-7%; foreign body provides a surface for biofilm formation; disrupts the urinary tract's mechanical clearance mechanism; CENTRAL VENOUS CATHETER (CLABSI risk): Direct access to the bloodstream; catheter hub manipulation is a major introduction site; MECHANICAL VENTILATION (VAP risk): Bypasses upper airway defenses; impairs cough reflex; requires frequent respiratory interventions; MAJOR SURGERY: Surgical site infection risk; immune suppression from anesthesia and stress response; prolonged hospitalization; nutritional depletion. MOST COMMON HAIs in order: CAUTI (catheter-associated urinary tract infection); CLABSI (central line-associated bloodstream infection); VAP (ventilator-associated pneumonia); SSI (surgical site infection). PREVENTION BUNDLES: Each device type has evidence-based insertion and maintenance bundles to reduce infection rates (e.g., CAUTI bundle includes daily assessment of catheter necessity and prompt removal when no longer needed).