RMA Infection Control and Safety Practices 2 — Questions and Answers
Question 1: Which of the following is the HIGHEST level of microbial destruction on the Spaulding classification scale?
- Sanitization
- Disinfection
- Sterilization (Correct answer)
- Antisepsis
Correct answer: Sterilization
Sterilization destroys ALL forms of microbial life including the most resistant bacterial endospores, representing the highest level of microbial elimination in the Spaulding classification system.
The Spaulding classification system categorizes medical devices by their risk of infection and the corresponding level of reprocessing required. It defines three levels: sterilization, high-level disinfection, and low-level disinfection. Sterilization eliminates all viable microorganisms including bacterial endospores (the most resistant form), viruses, fungi, and prions (with some limitations). It is required for critical items — those that enter sterile body tissues or the vascular system (e.g., surgical instruments, implants, needles). Methods include steam autoclave (the gold standard), dry heat, ethylene oxide (EtO) gas, hydrogen peroxide plasma, and glutaraldehyde soaking. High-level disinfection kills all microorganisms except high numbers of bacterial spores. It is used for semi-critical items like endoscopes and respiratory therapy equipment. Low-level disinfection kills most vegetative bacteria, some viruses, and some fungi but not spores or mycobacteria. Sanitization reduces microbial numbers to safe levels but is not a disinfection process. Antisepsis applies antimicrobial agents to living tissue (skin). Medical assistants must understand Spaulding classifications to select appropriate reprocessing methods for each instrument type.
Question 2: When performing hand hygiene before a clean procedure, how long should alcohol-based hand rub be rubbed on the hands?
- 5 seconds or until dry
- Until the hands feel dry (approximately 20–30 seconds) (Correct answer)
- 1 minute, just like soap and water
- The hands must be washed with soap and water; alcohol rub is insufficient
Correct answer: Until the hands feel dry (approximately 20–30 seconds)
WHO and CDC guidelines specify that alcohol-based hand rub should be applied and rubbed until completely dry, which takes approximately 20–30 seconds, to ensure adequate antimicrobial contact time.
Alcohol-based hand rubs (ABHR) with 60–95% alcohol concentration are highly effective for most clinical hand hygiene purposes and are preferred over soap and water in most healthcare settings (except when hands are visibly soiled or after contact with Clostridioides difficile or norovirus, where soap and water is required because alcohol is not sporicidal). The correct technique for ABHR involves: dispensing the manufacturer-recommended volume into the palm, rubbing hands together covering all surfaces — palms, backs of hands, between fingers, thumbs, fingertips, and wrists — and continuing until hands are completely dry, which takes approximately 20–30 seconds. Stopping early before the product dries reduces its effectiveness by limiting contact time. For soap and water, the process takes longer — approximately 40–60 seconds total including wetting, lathering, 20+ seconds of scrubbing all surfaces, rinsing, and drying. The 'dirty dozen' hand hygiene moments in healthcare are particularly important: before patient contact, before aseptic procedures, after body fluid exposure, after patient contact, and after touching patient surroundings.
Question 3: A healthcare worker sustains a needlestick injury from a needle used on a patient with known HIV infection. What is the FIRST action the medical assistant should take?
- Immediately report to the supervisor and complete an incident report
- Squeeze the wound to express blood, then scrub with povidone-iodine for 10 minutes
- Wash the wound thoroughly with soap and water (Correct answer)
- Apply a tourniquet above the injury site to prevent viral spread
Correct answer: Wash the wound thoroughly with soap and water
The first response to a needlestick injury is immediate, thorough washing of the wound with soap and water, followed by reporting to the supervisor and seeking occupational health evaluation for post-exposure prophylaxis (PEP).
Post-exposure management for bloodborne pathogen exposure follows a clear sequence. The FIRST step is immediate first aid: thoroughly wash the wound with soap and water for at least 15 seconds. For mucous membrane exposures (eyes, nose, mouth), flush with water or saline. Do NOT squeeze or suck the wound, as this may increase tissue damage. Do NOT apply caustic agents (bleach), and do NOT use tourniquets. Immediately after first aid, the employee must report the exposure to their supervisor and the occupational health department or emergency department. Documentation of the incident begins the formal exposure management process. Blood samples from both the exposed worker and, with consent, the source patient are collected for baseline testing. For HIV exposure, post-exposure prophylaxis (PEP) antiretroviral therapy should ideally begin within 2 hours and no later than 72 hours after exposure — every hour matters. For hepatitis B exposure, HBIG and/or vaccination may be indicated. OSHA's Bloodborne Pathogen Standard (29 CFR 1910.1030) mandates that facilities have an exposure control plan and provide post-exposure follow-up at no cost to the worker.
Question 4: Which transmission-based precaution category applies to a patient diagnosed with influenza?
- Contact precautions
- Droplet precautions (Correct answer)
- Airborne precautions
- Protective (reverse) isolation
Correct answer: Droplet precautions
Influenza spreads primarily via large respiratory droplets that travel up to 3–6 feet; droplet precautions (surgical mask, eye protection within 3 feet) are required — not airborne precautions.
The CDC/HICPAC transmission-based precaution categories are based on the route of pathogen transmission. Droplet precautions are used for pathogens spread by large respiratory droplets (>5 microns) that travel up to 3–6 feet during coughing, sneezing, or talking. These large droplets quickly fall to surfaces and do not remain suspended in the air. Examples: influenza, pertussis, group A streptococcal pharyngitis, mumps, rubella, meningococcal meningitis. Airborne precautions are for pathogens that remain suspended as small particles (<5 microns) that can travel long distances on air currents. Examples: tuberculosis, measles, varicella (chickenpox), disseminated zoster. Airborne precautions require a negative-pressure room and N95 respirator (or PAPR). Contact precautions are for organisms spread by direct or indirect physical contact: MRSA, VRE, C. difficile (also requires soap and water hand hygiene), norovirus, scabies. For influenza, the medical assistant needs a surgical mask when within 3 feet of the patient, gloves, and gown if soiling is expected, plus standard precautions. Cohorting influenza patients away from other patients is important during outbreak season.
Question 5: When disposing of a used scalpel blade, which action is CORRECT per OSHA bloodborne pathogen standards?
- Recap the blade and place in the regular waste bin
- Use forceps or a blade remover to transfer directly into a sharps container without recapping (Correct answer)
- Wrap in gauze and place in the biohazardous waste bag
- Bend the blade to prevent reuse before disposal
Correct answer: Use forceps or a blade remover to transfer directly into a sharps container without recapping
OSHA mandates that sharps such as scalpel blades must be placed directly into a puncture-resistant, leak-proof sharps container immediately after use — without recapping, bending, or manipulating the sharp edge in any way.
OSHA's Bloodborne Pathogen Standard (29 CFR 1910.1030) establishes strict requirements for sharps disposal to prevent needlestick and laceration injuries — the primary route of occupational bloodborne pathogen exposure. Key requirements include: never recapping, bending, breaking, or otherwise manipulating sharps by hand; placing all sharps (needles, scalpels, lancets, broken glass) immediately after use into puncture-resistant, leak-proof, properly labeled sharps containers; positioning sharps containers as close as feasible to the area of use; and replacing containers before they are overfilled (typically at the fill line, approximately 75% full). For scalpel blades specifically, a blade removal tool or forceps should be used to protect against laceration injury during removal and transfer to the sharps container. Attempting to remove a scalpel blade by hand is prohibited. Sharps containers are red or bear the biohazard symbol and must be stored upright to prevent spillage. When full, they are sealed and disposed of through a regulated medical waste contractor. Medical assistants have both a legal and ethical responsibility to follow sharps safety protocols consistently.
Question 6: Which type of isolation requires the patient's room to have NEGATIVE air pressure relative to the hallway?
- Contact precautions
- Droplet precautions
- Airborne infection isolation (AII) (Correct answer)
- Protective (neutropenic) isolation
Correct answer: Airborne infection isolation (AII)
Airborne infection isolation rooms (AIIRs) maintain negative air pressure so that air flows into the room from the hallway, preventing infectious aerosol particles from escaping into common areas.
An airborne infection isolation room (AIIR, also called a negative-pressure isolation room) is engineered to contain pathogens that spread via the airborne route. The room is maintained at negative air pressure relative to the corridor — air flows from the hallway (relatively higher pressure) into the patient's room (lower pressure) when the door is opened. The air in the AIIR is exhausted directly to the outside or through HEPA filtration before recirculation, and the required air exchanges are at least 6 per hour (12 per hour recommended for new construction). This prevents contaminated air from the patient's room from drifting into hallways and infecting other patients or staff. AIIRs are required for patients with known or suspected tuberculosis (TB), measles, varicella, disseminated herpes zoster, and smallpox. In contrast, protective (neutropenic) isolation rooms for severely immunocompromised patients use POSITIVE air pressure to keep environmental organisms OUT of the room — the opposite direction. The door must be kept closed at all times in both room types. Staff entering an AIIR must wear a fit-tested N95 respirator (or higher-level respiratory protection).
RMA Infection Control and Safety Practices 2
Which of the following is the HIGHEST level of microbial destruction on the Spaulding classification scale?