Test Flashcards

How many air exchanges per hour should rooms have for allogenic hematopoietic stem cell transplantation (HSCT) recipients?

Answer: 12

For protective environments, such as rooms housing allogenic hematopoietic stem cell transplantation (HSCT) recipients, strict air quality standards are crucial to prevent infection. Guidelines recommend a minimum of 12 air changes per hour (ACH) to effectively dilute and remove airborne contaminants. This high rate of air exchange helps protect these highly immunocompromised patients from environmental pathogens.

The most efficient strategy for preventing hospital-acquired illnesses is:

Answer: handwashing

Handwashing is widely recognized as the single most effective and efficient strategy for preventing the spread of infections in healthcare settings. Proper hand hygiene by healthcare personnel significantly reduces the transmission of pathogens from one patient or surface to another. This simple yet critical practice breaks the chain of infection, thereby minimizing hospital-acquired illnesses.

The BEST technique to use if hair removal is necessary before surgery is to:

Answer: remove hair with clippers immediately before incision

Surgical site infection (SSI) prevention guidelines recommend removing hair with electric clippers immediately before surgery, if hair removal is necessary. Clippers cause less micro-trauma to the skin compared to razors, which can create microscopic cuts that increase the risk of infection. Performing hair removal just prior to incision minimizes the time for any potential skin irritation or bacterial growth.

The most likely cause of mastitis in nursing mothers is:

Answer: infant colonized with Staphylococcus aureus

Mastitis, an inflammation of the breast, is most commonly caused by bacterial infection, with *Staphylococcus aureus* being the predominant pathogen. The bacteria typically enter the breast through a cracked nipple, and the infant's oral flora, often colonized with *S. aureus*, is a frequent source of these bacteria. Therefore, an infant colonized with *Staphylococcus aureus* is the most likely cause.

The BEST way to explain an evaluation process is to utilize the following when serving as the chair of a quality improvement committee that is analyzing processes and procedures to identify where problems exist:

Answer: flow chart

A flow chart is the most effective tool for explaining an evaluation process and identifying problems within procedures. It visually maps out each step in a sequence, including decision points and parallel processes, making complex workflows easy to understand. This visual representation clearly highlights potential bottlenecks, inefficiencies, or areas where problems exist, facilitating analysis and improvement.

How long are immunoglobulin M antibodies against hepatitis A virus (IgM anti-HAV) detectable in the blood after exposure to HAV?

Answer: 3 weeks

Immunoglobulin M (IgM) antibodies against hepatitis A virus (HAV) are typically detectable in the blood approximately 2-3 weeks after exposure, coinciding with the onset of clinical symptoms. These IgM antibodies indicate a recent or acute infection and usually persist for several months. Therefore, 3 weeks is the most accurate timeframe for their detectability after exposure.

Which kind of vascular access device (VAD) carries the lowest risk of infection for individuals who need hemodialysis?

Answer: arteriovenous fistula

An arteriovenous (AV) fistula is considered the gold standard for hemodialysis access due to its significantly lower risk of infection compared to other vascular access devices. Unlike grafts or catheters, an AV fistula uses the patient's own blood vessels, which reduces the likelihood of foreign body reactions and bacterial colonization. This makes it the safest option for long-term dialysis.