Tourniquet
The most common sample analyzed in the hematology section is:
A. plasma
B. whole blood
C. urine
D. serum
B. whole blood
Which of the following tubes must always be completely filled?
A. Gray
B. Red
C. Pink
D. Light blue
D. Light blue
The purpose of gel in an evacuated tube is to:
A. increase clot formation.
B. prevent cellular contamination of serum or plasma.
C. prevent clot formation.
D. facilitate blood bank testing procedures.
B. prevent cellular contamination of serum or plasma.
An example of an antiglycolytic agent is:
A. ammonium heparin.
B. ethylenediaminetetraacetic acid (EDTA).
C. sodium fluoride.
D. potassium oxalate.
C. sodium fluoride.
Basic information that should be present on all requisition forms includes which of the following?
A. Tests requested
B. Patient’s identification number
C. Patient’s name
D. All of the above
D. All of the above
Most laboratory tests are performed using:
A. oxygenated blood.
B. venous blood.
C. arterial blood.
D. capillary blood.
B. venous blood.
The purpose of sodium fluoride in gray stopper tubes is to:
A. preserve glucose.
B. prevent clotting.
C. prevent hemolysis.
D. maintain cellular morphology.
A. preserve glucose.
To obtain a serum sample for a stat test on a patient receiving anticoagulant therapy, the recommended tube is:
A. red.
B. gold.
C. green.
D. orange.
D. orange.
The advantages of an evacuated tube system (ETS) over a syringe are:
1. no transfer of blood is necessary.
2. it is a closed system.
3. the holder can be reused.
4. you have more control over the vacuum.
A. 2 and 4
B. 1 and 2
C. 1, 2, and 3
D. 1, 2, 3, and 4
B. 1 and 2
The most important procedure in blood collection is to:
A. identify the patient correctly.
B. introduce yourself to the patient.
C. organize equipment at the bedside.
D. initial the requisition form.
A. identify the patient correctly.
Coagulation requires which of the following?
A. Prothrombin
B. Thrombin
C. All of the above
D. Fibrin
C. All of the above
The tube of choice for trace metal analysis is:
A. red.
B. light blue.
C. gold.
D. royal blue.
D. royal blue.
Which of the following is the most acceptable order of tube draw?
A. Light blue, green, and lavender
B. Green, lavender, and light blue
C. Lavender, green, and light blue
D. Green, light blue, and lavender
A. Light blue, green, and lavender
To prevent leakage of blood when tubes are changed, evacuated tube needles:
A. use a rubber sheathe.
B. are only used for single tube collections.
C. are used with safety holders.
D. have a blunting device.
A. use a rubber sheathe.
Which of the following are used to identify a patient?
A. Identification band
B. Requisition form
C. All of the above
D. Bar codes
C. All of the above
The primary antiseptic for routine venipuncture is:
A. isopropyl alcohol.
B. chlorhexidine.
C. Betadine.
D. iodine.
A. isopropyl alcohol.
Yellow stopper tubes containing sodium polyanethol sulfonate are used for which of the following?
A. Human leukocyte antigen (HLA) typing
B. Blood cultures
C. Paternity testing
D. Lead testing
B. Blood cultures
Failing to adequately invert a lavender stopper tube after collection will:
A. cause hemolysis.
B. produce a clotted sample.
C. falsely elevate calcium results.
D. destroy coagulation factors.
B. produce a clotted sample.
Which of the following needles has the largest diameter?
A. 18 gauge
B. 22 gauge
C. 20 gauge
D. 16 gauge
D. 16 gauge
Palpate means to:
A. examine by touch.
B. obtain a sample from an IV line.
C. perform a venipuncture.
D. examine by sound.
A. examine by touch.
A properly tied tourniquet:
A. blocks arterial and venous flow.
B. permits venous flow and blocks arterial flow.
C. permits arterial flow and blocks venous flow.
D. prevents backflow.
C. permits arterial flow and blocks venous flow.
he ratio of blood to anticoagulant in a light blue stopper tube is:
A. 10:1.
B. 9:1.
C. 2:1.
D. 5:1.
B. 9:1.
Electrolytes can be performed on serum or plasma from which of the following tubes?
A. Gold
B. All of the above
C. Green
D. Red
A. Gold
The most important reason that the blood collector’s tray should not be carried into the room of a patient in isolation is that:
A. the tray should be left in the hallway so others may find the blood collector when needed.
B. supplies may be stolen from the tray.
C. surfaces on the tray may act as a reservoir for infectious agents.
D. there is often no spare space available in an isolation room.
C. surfaces on the tray may act as a reservoir for infectious agents.
Prolonged application of a tourniquet will cause:
excessive bleeding.
B. difficulty locating a vein.
C. hemolysis.
D. clotting.
C. hemolysis.