VABC Infection Prevention 5

Question 1

Which component of the central line insertion bundle specifically targets the patient's skin flora as the primary contamination source?

Accepted Answer

Chlorhexidine gluconate skin antisepsis

Answer

Chlorhexidine gluconate skin antisepsis directly targets cutaneous microorganisms at the insertion site, which are the primary source of extraluminal catheter colonization.

Question 2

A patient receiving home infusion therapy through a tunneled catheter presents with fever and chills that occur within 2 hours of starting the infusion. The nurse suspects which catheter complication first?

Accepted Answer

Catheter-related bloodstream infection

Answer

Fever and rigors temporally associated with catheter infusion are classic signs of CRBSI, as flushing disturbs biofilm and releases organisms into the bloodstream.

Question 3

For implanted venous ports, which dressing type and change frequency is recommended by INS when the site is well-healed and accessed with a non-coring needle?

Accepted Answer

Transparent semipermeable membrane changed every 7 days or sooner if integrity is compromised

Answer

INS recommends a TSM dressing changed every 7 days (or sooner if non-intact) over an accessed implanted port needle to maintain a sterile barrier at the insertion site.

Question 4

When drawing blood cultures to diagnose a suspected CRBSI, the CORRECT technique includes:

Accepted Answer

Drawing one set peripherally and one set through each catheter lumen, labeling all samples with source and time

Answer

Paired blood cultures drawn simultaneously from a peripheral vein and through the catheter, each labeled with source and time, allow differential time-to-positivity analysis to confirm catheter origin.

Question 5

Which statement BEST describes the role of ethanol lock therapy in vascular access infection prevention?

Accepted Answer

Ethanol lock instills 70% ethanol into the catheter lumen to sterilize biofilm and is used prophylactically or therapeutically in high-risk patients

Answer

Ethanol lock therapy uses 70% ethanol dwelling in the catheter lumen to eradicate biofilm-embedded organisms and is used prophylactically in high-risk patients (e.g., pediatric oncology, home PN) or therapeutically for catheter salvage.

(VABC) Vascular Access Board Certification Practice Test

(VABC) Vascular Access Board Certification Practice Test

VABC Infection Prevention 5