Obesity and Vascular Access Devices Quiz

Why should wrong or expired collection tubes not be used?

The manufacturer cannot warrant the quality of the seal and pressure after the expiration date.

What are some reasons for failed venipuncture attempts?

Improper seating of the tube and failure of the needle to go through the stopper.

What are some critical factors related to needle position in venipuncture?

Needle not inserted far enough
Bevel partially out of skin
Bevel partially into vein
Bevel partially through vein
Bevel completely through vein
Bevel against vein wall
Needle beside vein
Undetermined position

When do collapsed veins usually occur?

When conditions are less than ideal, leading to blocked veins and insufficient blood flow. Signup and view all the answers

What is the pre-analytical testing phase in laboratory procedures?

Procedures that take place before laboratory testing, including handling and identification. Signup and view all the answers

What is the purpose of a laboratory test in the medical field?

To diagnose and monitor the presence of a disease. Signup and view all the answers

Why should a phlebotomist avoid collecting blood from an arm with an IV line?

The blood collected could be contaminated with IV fluid. Signup and view all the answers

What is a reference range or reference interval used for in laboratory testing?

To show the high and low limits of result values compared to healthy individuals. Signup and view all the answers

How long should blood collection from previously known IV sites be avoided?

24 to 48 hours Signup and view all the answers

What are the three types of Central Vascular Access Devices (CVADs) mentioned?

Central venous catheter lines, implanted port, peripherally inserted central catheter Signup and view all the answers

Why is the basal state important in establishing a reference range?

It represents the body's metabolism condition early in the morning or after fasting. Signup and view all the answers

What is a Central Venous Catheter?

Central line inserted into the large vein (subclavian) and advanced into the superior vena cava. Signup and view all the answers

What factors are considered in the interpretation of reference intervals?

Age, gender, and body conditions. Signup and view all the answers

What are the responsibilities of a phlebotomist during the pre-analytical testing phase?

Drawing blood from patients and identifying factors that affect the process. Signup and view all the answers

What is the purpose of a Central Venous Catheter?

Used for blood collection, monitoring patient's pressures, and administering medications and fluids. Signup and view all the answers

What is the significance of the collection site in relation to an IV line?

The collection site should be below the IV line. Signup and view all the answers

What is the condition in which an individual is grossly overweight?

Obesity Signup and view all the answers

What is a solution for locating veins in obese patients with deep veins?

Using a longer tourniquet Signup and view all the answers

Why are vascular access devices (VADs) needed in some cases?

For blood sampling, infusing medication, central venous pressure readings, and blood transfusion Signup and view all the answers

What is the purpose of an arterial line in phlebotomy?

To obtain samples for arterial blood gas and laboratory studies Signup and view all the answers

Why is neither tourniquet nor venipuncture allowed in the arm with an arterial line?

To avoid complications and maintain the integrity of the line Signup and view all the answers

What is the purpose of an arteriovenous shunt or fistula?

To connect the artery and a vein directly Signup and view all the answers

Where is an implanted port usually placed on the body?

Upper chest just below the collarbone Signup and view all the answers

What is a peripherally inserted central catheter (PICC)?

A flexible tube inserted into the veins of extremities and central veins Signup and view all the answers

What is the purpose of a septum in an implanted port?

To provide access for inserting a needle Signup and view all the answers

Which part of the body is a peripherally inserted central catheter (PICC) inserted into?

Veins of extremities and central veins Signup and view all the answers

What is the function of a catheter in an implanted port?

To deliver medications or withdraw blood Signup and view all the answers

How is an implanted port different from a peripherally inserted central catheter (PICC)?

Implanted port is disk-shaped, attached to an indwelling line. PICC is a flexible tube inserted into veins. Signup and view all the answers

What is the purpose of a port-a-cath system?

To provide long-term access for medications or blood withdrawal Signup and view all the answers

Why is it important for the septum of an implanted port to be self-sealing?

To prevent leakage and maintain sterility Signup and view all the answers

What is the advantage of using an implanted port over traditional IV lines?

Less risk of infection and more comfortable for the patient Signup and view all the answers