Free AAMA Infection Control, Medical Asepsis, and Sterilization Questions and Answers 1 — Questions and Answers
Question 1: What is the primary purpose of medical asepsis?
- To destroy all microorganisms and spores on an object
- To reduce the number of pathogens and prevent their spread (Correct answer)
- To sterilize the skin before a surgical procedure
- To isolate patients with communicable diseases
Correct answer: To reduce the number of pathogens and prevent their spread
Medical asepsis, also known as 'clean technique,' involves procedures to reduce the number of microorganisms and prevent their spread. This includes practices like handwashing and cleaning surfaces. It does not eliminate all microbes, but significantly lowers the risk of infection.
Question 2: Which of the following is an example of a fomite in the chain of infection?
- A mosquito carrying the West Nile virus
- A patient with influenza
- A contaminated examination room countertop (Correct answer)
- A cough from an infected person
Correct answer: A contaminated examination room countertop
A fomite is an inanimate object that can become contaminated with infectious agents and serve as a mechanism for transmission. A contaminated countertop is a classic example. A mosquito is a vector, a person is a host, and a cough is a means of transmission.
Question 3: What is the most critical difference between disinfection and sterilization?
- Disinfection uses chemicals, while sterilization uses heat.
- Sterilization kills bacterial spores, while disinfection does not. (Correct answer)
- Disinfection is for surfaces, while sterilization is for instruments.
- Sterilization is a faster process than disinfection.
Correct answer: Sterilization kills bacterial spores, while disinfection does not.
Sterilization is the process that destroys all forms of microbial life, including highly resistant bacterial spores. Disinfection, on the other hand, eliminates most pathogenic microorganisms but does not reliably kill bacterial spores. This distinction is critical for items that will enter sterile body tissues.
Question 4: According to Standard Precautions, when should a medical assistant perform hand hygiene?
- Only after contact with a patient in isolation
- Only when hands are visibly soiled
- Before and after every patient encounter (Correct answer)
- At the beginning and end of the workday
Correct answer: Before and after every patient encounter
Standard Precautions dictate that hand hygiene should be performed before and after every patient contact, after contact with contaminated surfaces, and after removing gloves. This is the single most important practice for preventing the spread of nosocomial infections. It applies to all patient encounters.
Question 5: An autoclave is used to sterilize medical instruments. What mechanism does it use?
- Dry heat
- Ethylene oxide gas
- Steam under pressure (Correct answer)
- Ultraviolet radiation
Correct answer: Steam under pressure
An autoclave uses steam under pressure to achieve sterilization. The high pressure allows the steam to reach temperatures (typically 121°C or 250°F) that are sufficient to kill all microorganisms, including spores. This method is fast, effective, and reliable for items that can withstand the heat and moisture.
Question 6: When removing Personal Protective Equipment (PPE), which item should be removed first to minimize self-contamination?
- Mask or respirator
- Gown
- Goggles or face shield
- Gloves (Correct answer)
Correct answer: Gloves
Gloves are considered the most contaminated piece of PPE and should be removed first. This prevents the transfer of pathogens from the dirty gloves to your face, hair, or clothing during the rest of the doffing process. The sequence is critical for preventing self-contamination.
Free AAMA Infection Control, Medical Asepsis, and Sterilization Questions and Answers 1
What is the primary purpose of medical asepsis?