RTBC- Lab Tests UPDATED ACTUAL
Exam Questions and CORRECT Answers
What are the 2 main reasons we need blood tests in diagnostic imaging? - CORRECT
ANSWER - 1. Check adequate kidney function
2. Check adequate blood clotting
Why is checking kidney function important within diagnostic imaging? - CORRECT
ANSWER - When injecting intravenous contrast, we need to check a patient's BUN,
creatinine, and GFR levels.
What is the importance of adequate blood clotting within diagnostic imaging? - CORRECT
ANSWER - When we insert large needles into the patient, we need to check a patient's PT,
PTT, INR, and platelet function.
What does BUN acronym stand for? - CORRECT ANSWER - Blood Urea Nitrogen
What is the normal range given for a BUN? - CORRECT ANSWER - Normal is 7-21
What if a patient's BUN reading is above 21? - CORRECT ANSWER - Indicates that the
kidneys are struggling to function.
What if a patient's BUN reading is above 50? - CORRECT ANSWER - It might mean the
patient is in renal failure and we do not want to give the patient intravenous contrast since the
kidneys could be further damaged.
What is creatinine? - CORRECT ANSWER - Is a chemical byproduct of metabolism in
the muscles. It is circulated through the blood and also filtered out by the kidneys
What is the normal range given for creatinine? - CORRECT ANSWER - Normal is 0.7-1.5
, If a patient's creatinine level is above 1.5, what does this indicate? - CORRECT
ANSWER - It is a strong indication that the patient's kidneys are not fit for filtering out
iodinated contrast.
Creatinine levels can fluctuate based upon what factors? - CORRECT ANSWER - Factors
include patient's age, gender, amount of muscle mass and hydration status.
What other value can be calculated from the creatinine reading? - CORRECT ANSWER -
GFR
Glomerular Filtration Rate
What does GFR stand for? - CORRECT ANSWER - Glomerular Filtration Rate
What does a GFR test determine? - CORRECT ANSWER - Estimates the rate at which the
kidneys, as the glomerulus are filtering waste from the blood.
What is a normal range of values for GFR? - CORRECT ANSWER - Normal is 90-120
If the GFR is well below 90 what does this indicate? - CORRECT ANSWER - Strong
indication that the patient's kidneys are not functioning adequately to filter out intravenous
contrast.
Since GFR levels are estimated from creatinine, they also can fluctuate based upon what factors?
- CORRECT ANSWER - Factors include patient's age, gender, amount of muscle mass
and hydration status.
True or False
The kidneys have to filter out both urea and creatinine. - CORRECT ANSWER - TRUE
Exam Questions and CORRECT Answers
What are the 2 main reasons we need blood tests in diagnostic imaging? - CORRECT
ANSWER - 1. Check adequate kidney function
2. Check adequate blood clotting
Why is checking kidney function important within diagnostic imaging? - CORRECT
ANSWER - When injecting intravenous contrast, we need to check a patient's BUN,
creatinine, and GFR levels.
What is the importance of adequate blood clotting within diagnostic imaging? - CORRECT
ANSWER - When we insert large needles into the patient, we need to check a patient's PT,
PTT, INR, and platelet function.
What does BUN acronym stand for? - CORRECT ANSWER - Blood Urea Nitrogen
What is the normal range given for a BUN? - CORRECT ANSWER - Normal is 7-21
What if a patient's BUN reading is above 21? - CORRECT ANSWER - Indicates that the
kidneys are struggling to function.
What if a patient's BUN reading is above 50? - CORRECT ANSWER - It might mean the
patient is in renal failure and we do not want to give the patient intravenous contrast since the
kidneys could be further damaged.
What is creatinine? - CORRECT ANSWER - Is a chemical byproduct of metabolism in
the muscles. It is circulated through the blood and also filtered out by the kidneys
What is the normal range given for creatinine? - CORRECT ANSWER - Normal is 0.7-1.5
, If a patient's creatinine level is above 1.5, what does this indicate? - CORRECT
ANSWER - It is a strong indication that the patient's kidneys are not fit for filtering out
iodinated contrast.
Creatinine levels can fluctuate based upon what factors? - CORRECT ANSWER - Factors
include patient's age, gender, amount of muscle mass and hydration status.
What other value can be calculated from the creatinine reading? - CORRECT ANSWER -
GFR
Glomerular Filtration Rate
What does GFR stand for? - CORRECT ANSWER - Glomerular Filtration Rate
What does a GFR test determine? - CORRECT ANSWER - Estimates the rate at which the
kidneys, as the glomerulus are filtering waste from the blood.
What is a normal range of values for GFR? - CORRECT ANSWER - Normal is 90-120
If the GFR is well below 90 what does this indicate? - CORRECT ANSWER - Strong
indication that the patient's kidneys are not functioning adequately to filter out intravenous
contrast.
Since GFR levels are estimated from creatinine, they also can fluctuate based upon what factors?
- CORRECT ANSWER - Factors include patient's age, gender, amount of muscle mass
and hydration status.
True or False
The kidneys have to filter out both urea and creatinine. - CORRECT ANSWER - TRUE
