VABC Vascular Access Devices & Technologies

Question 1

What is the primary function of a central venous catheter (CVC)?

Accepted Answer

To deliver fluids and medications directly into large veins for long-term access

Answer

The primary function of a central venous catheter (CVC) is to provide long-term access for delivering fluids and medications directly into large, central veins. This allows for the administration of therapies that are irritating to peripheral veins, require high flow rates, or are needed for extended periods, such as chemotherapy, parenteral nutrition, or certain antibiotics. CVCs are crucial for patients requiring intensive or prolonged intravenous treatment.

Question 2

Why are peripherally inserted central catheters (PICC) used in vascular access?

Accepted Answer

They are used for long-term intravenous therapy, with a lower risk of complications

Answer

Peripherally inserted central catheters (PICCs) are widely used in vascular access for long-term intravenous therapy. They offer a less invasive alternative to traditional central lines, as they are inserted into a peripheral vein and advanced to a central vein. PICCs are associated with a lower risk of certain complications, such as pneumothorax, making them a safer option for extended medication delivery or nutritional support.

Question 3

What is the difference between a tunneled and a non-tunneled central venous catheter?

Accepted Answer

Tunneled CVCs are for long-term use and are surgically inserted under the skin

Answer

The key difference lies in their insertion and intended duration of use: tunneled CVCs are surgically inserted under the skin and have a subcutaneous tunnel and cuff, which provides a barrier against infection and helps secure the catheter for long-term use. Non-tunneled CVCs are inserted directly into a central vein and are typically used for short-term access, as they carry a higher risk of infection due to the lack of a subcutaneous tunnel.

Question 4

How does a dialysis catheter differ from other vascular access devices?

Accepted Answer

It is specifically designed for hemodialysis, allowing blood removal and return at high volumes

Answer

A dialysis catheter is uniquely designed for hemodialysis, which requires the rapid removal and return of large volumes of blood. These catheters have larger lumens than other vascular access devices to accommodate the high flow rates necessary for efficient blood purification. Their specific design ensures effective and safe access for patients undergoing renal replacement therapy.

Question 5

Why is ultrasound used in vascular access procedures?

Accepted Answer

It is used to visualize veins and arteries, improving device placement accuracy

Answer

Ultrasound is an invaluable tool in vascular access procedures because it allows clinicians to visualize veins and arteries in real-time. This visualization significantly improves the accuracy of device placement by helping to identify suitable vessels, avoid nerves and arteries, and confirm successful cannulation. Using ultrasound reduces insertion attempts, minimizes complications, and enhances patient safety.

(VABC) Vascular Access Board Certification Practice Test

(VABC) Vascular Access Board Certification Practice Test

VABC Vascular Access Devices & Technologies