Question 1

Using a small-gauge needle with a large evacuated tube can cause:

Accepted Answer

A)  a hematoma. 
B)  petechiae. 
C)  hemolysis. 
D)  patient discomfort.

Question 2

Parents should not be allowed to hold a child in their laps while venipuncture is being performed.

Accepted Answer

A) True 
 B)False

Question 3

If the plunger of a syringe is pulled back too fast:

Accepted Answer

A)  the patient feels a stinging sensation. 
B)  the sample may be hemolyzed. 
C)  the patient will develop a hematoma. 
D)  Both A and B

Question 4

Matching
Match the following variables with the possible effect on test results.
-Chemotherapy

Accepted Answer

A) Decreased glucose 
B) Decreased white blood cell (WBCs) and platelets 
C) Increased cholesterol and triglycerides 
D) Increased hemoglobin 
E) Increased PO2 and white blood cells (WBCs)
F)Increased prothrombin time (PT) and activated partial thromboplastin time (APTT)

Question 5

If a patient begins to faint during the venipuncture,the blood collector should immediately:

Accepted Answer

A)  lower the patient's head. 
B)  remove the tourniquet and needle. 
C)  summon a supervisor or nurse. 
D)  provide the patient with a sweet drink.

Question 6

Samples for test substances that exhibit diurnal variation must be collected:

Accepted Answer

A)  at specific times. 
B)  from fasting patients. 
C)  when patients are lying down. 
D)  when patients are in a basal state.

Question 7

Methods to reassure pediatric patients may include which of the following?

Accepted Answer

A)  Applying a local anesthetic 
B)  Encouraging them to ask questions 
C)  Having their parents present 
D)  All of the above

Question 8

The effects of a posture change in the patient,from a supine position to standing,can have a significant effect on some laboratory test results.Which of the following statements about these changes are true?

Accepted Answer

A)  Patients should generally be lying down or sitting for 5 minutes prior to having blood samples collected. 
B)  The effects are most noticeable for lipid profiles. 
C)  The effects are greatest in patients with congestive heart failure and liver disease. 
D)  All of the above

Question 9

Hemolysis can be present in a sample even though the plasma does not appear pink.

Accepted Answer

A) True 
 B)False

Question 10

When an evacuated tube is pushed onto the needle,blood begins to flow and then stops.This could be caused by which of the following?

Accepted Answer

A)  An occluded vein 
B)  Collapsing of the vein 
C)  The bevel of the needle resting on the vein wall 
D)  All of the above

Question 11

Which of the following samples would be rejected?

Accepted Answer

A)  Unlabeled sample 
B)  Sample without a requisition form 
C)  Half-full light-blue stopper tube 
D)  All of the above

Question 12

When working in pediatrics,a blood collector must gain the confidence of the patient and the parents.

Accepted Answer

A) True 
 B)False

Question 13

A patient who presents with petechiae prior to tourniquet application may require:

Accepted Answer

A)  additional reassurance. 
B)  use of a blood pressure cuff. 
C)  blood to be drawn from a hand vein. 
D)  additional pressure following needle removal.

Question 14

Samples are rejected by the laboratory for which of the following reasons?

Accepted Answer

A)  Clots in a lavender stopper tube 
B)  Collection in the wrong tube 
C)  Incompletely filled light-blue stopper tubes 
D)  All of the above

Question 15

Lipemic serum appears:

Accepted Answer

A)  clear and pale yellow. 
B)  dark-yellow due to the presence of bilirubin. 
C)  clear and red. 
D)  cloudy due to the presence of fat.

Question 16

Recent strenuous exercise may affect the results of tests for:

Accepted Answer

A)  lactate dehydrogenase and creatine kinase. 
B)  bilirubin and alanine transaminase. 
C)  glucose and blood urea nitrogen. 
D)  amylase and uric acid.

Question 17

Blood tests that are affected by the patient's posture are those that measure:

Accepted Answer

A)  electrolytes. 
B)  large molecules. 
C)  glucose. 
D)  small molecules.

Question 18

A patient who appears pale and has cold,damp skin may develop:

Accepted Answer

A)  coagulation problems. 
B)  septicemia. 
C)  sclerosis. 
D)  syncope.

Question 19

A tourniquet is placed on the patient's arm,the vein is located,and the needle is inserted into the arm.No blood flows into the tube,but a dark bulge begins to appear at the puncture site.This describes:

Accepted Answer

A)  hemolysis. 
B)  hemodialysis. 
C)  hemoconcentration. 
D)  hematoma.

Question 20

Performing venipunctures on pediatric patients may require which of the following?

Accepted Answer

A)  Obtaining assistance from a parent to hold the arm 
B)  Obtaining identification from the parents 
C)  Using toys to demonstrate the procedure 
D)  All of the above

Exam 4: Preexamination Variables and Venipuncture Complications

Using a small-gauge needle with a large evacuated tube can cause:

Parents should not be allowed to hold a child in their laps while venipuncture is being performed.

If the plunger of a syringe is pulled back too fast:

Matching Match the following variables with the possible effect on test results. -Chemotherapy

If a patient begins to faint during the venipuncture,the blood collector should immediately:

Samples for test substances that exhibit diurnal variation must be collected:

Methods to reassure pediatric patients may include which of the following?

The effects of a posture change in the patient,from a supine position to standing,can have a significant effect on some laboratory test results.Which of the following statements about these changes are true?

Hemolysis can be present in a sample even though the plasma does not appear pink.

When an evacuated tube is pushed onto the needle,blood begins to flow and then stops.This could be caused by which of the following?

Which of the following samples would be rejected?

When working in pediatrics,a blood collector must gain the confidence of the patient and the parents.

A patient who presents with petechiae prior to tourniquet application may require:

Samples are rejected by the laboratory for which of the following reasons?

Lipemic serum appears:

Recent strenuous exercise may affect the results of tests for:

Blood tests that are affected by the patient's posture are those that measure:

A patient who appears pale and has cold,damp skin may develop:

A tourniquet is placed on the patient's arm,the vein is located,and the needle is inserted into the arm.No blood flows into the tube,but a dark bulge begins to appear at the puncture site.This describes:

Performing venipunctures on pediatric patients may require which of the following?