What is the essential advantage of using a large-bore PVAD?

What is the essential advantage of using a large-bore PVAD?

• A. Decreased infection risk
• B. Faster administration of large fluid volumes
• C. Easier to insert
• D. Only for air infusions

Answer: (B)

The key idea is that larger bore cannulas reduce resistance to flow, so fluids can be infused more quickly. In IV flow, the rate of infusion increases dramatically with the width of the cannula’s inner diameter (a larger radius means much less resistance), so a large-bore PVAD lets you deliver large fluid volumes faster—crucial in resuscitation or rapid dehydration correction. Infection risk isn’t inherently lower with a larger bore, and insertion difficulty isn’t guaranteed to be easier; it’s not limited to air infusions. So the essential advantage is faster administration of large fluid volumes.

The key idea is that larger bore cannulas reduce resistance to flow, so fluids can be infused more quickly. In IV flow, the rate of infusion increases dramatically with the width of the cannula’s inner diameter (a larger radius means much less resistance), so a large-bore PVAD lets you deliver large fluid volumes faster—crucial in resuscitation or rapid dehydration correction. Infection risk isn’t inherently lower with a larger bore, and insertion difficulty isn’t guaranteed to be easier; it’s not limited to air infusions. So the essential advantage is faster administration of large fluid volumes.