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Final Exam

Chapter 53 and Chapter 54
STUDY
PLAY
Which of the following Vacutainer tubes is routinely used for hematology testing?
lavender topped
What is an anticoagulant that prevents platelets from clumping and preserves the appearance of blood cells for microscopic preparation?
EDTA
The needle size most commonly used for adult venipuncture is which gauge?
21
The needle size most commonly used by the blood bank for donations is which gauge?
16
Plasma could be retrieved from a what?
SST red-gray tube and PST green-gray tube
A tourniquet is used during the phlebotomy procedure to
prevent venous flow out of the site and cause the vein to bulge
Without a clot activator, whole blood typically clots in how many minutes?
30 to 60 minutes
Erthrocytes have a typical _____shape because of ________.
concave; their lack of a nucleus
Dr. Lim orders a CPK draw on Mr. Roberts. What do elevated CPK levels indicate?
Possible MI
Which of the following is a normal adult WBC count?
10,000 cells/mm3
In performance of a microhematocrit:
the open end of the capillary tube should be sealed with clay before centrifuging
The buffy coat:
is white
A decreased hematocrit value could be the result of:
hemorrhage and anemia
The copper sulfate method of determining the hemoblogin level is:
a qualitative test
based on the specific gravity of hemoglobin
commonly used to screen blood donors
The _____ is the part of the venipuncture needle that fits into the syringe or Vacutainer adapter.
hub
You are required to collect a venous sample for a typical hematology test, the complete blood count. You collect:
a lavender-topped tube
In a routine venipuncture, the angle at which the needle enters the arm should be _______ degrees.
15
During a routine venipuncture, when should the phlebotomist request that the patient "make a fist"?
after applying the tourniquet and before inserting the needle
During the routine venipuncture, when should the phlebotomist request that the patient "release the fist"?
when the last tube has been filled, before the tourniquet is removed.
Which vein (s) can be used for routine venipuncture?
medial cephalic, medial basilic, supplementary cephalic
A winged fusion set is also known as a
butterfly needle
A needle-stick is more likely to occur if
an attempt is made to recap a needle
A hematoma can be caused by
excessive probing to locate a vein, failure to insert the needle far enough into the vein, penetration of the needle through a vein
Blood obtained via capillary puncture can be collected
in microtainer tubes, capillary tubes, microhematocrit tubes, and onto filter paper
The most common phlebotomy site in adults are the
veins in the antecubital space
Which is the most correct method for performing a capillary puncture?
wipe away the first drop of blood and then collect the sample
You are performing a capillary puncture on a patient and are having difficulty collecting an adequate sample. Which of the following is an accepted method to encourage blood flow from the site?
gently rub the finger along the sides
The clear part of whole blood that contains clotting agents is
plasma
Which is the proper technique for performing a venipuncture?
the needle bevel is face up, and the needle is inserted at a 15-degree angle.
The color of the tube top for collection of a coagulation test is
light blue
Which of the following is a normal H&H for a female?
36% and 14 g/dL
A hematocrit reading of 37 indicates what?
RBCs account for 37% of the total blood volume
Which of the following is an abnormal value for a differential?
50% to 70% basophils
The ESR test results
vary greatly between genders and as people age
Which department of the laboratory performs H&H tests?
Hematology
A blood test that analyzes the ability of the kidneys to perform their function is the
BUN
A person with type O blood has
anto-A and anti-B antibodies in circulation
Which of the following is not detected in a liver panel test?
CBC
TSH levels are assessed to determine the function of what organs?
Pituitary
Troponin is a component of a _______ panel.
cardiac
Which statement is true about HDL?
it tansports cholesterol
Hemoglobin A1C is measured to monitor
diabetes
The smallest of the formed elements in the peripheral blood is a cell fragment that assists with clotting; it is known as a
platelet or thrombocyte
A counting chamber known as a _________ is used to enumerate blood cells in a diluted specimen.
hemacytometer
The granular leukocytes, which are called ________ leukocytes, include neutrophils, eosinophils, and basophils.
polymorphonuclear
A _______ is performed by the immunohematology department to determine blood compatibility before a transfusion
type and cross
Increases in the ____________ may indicate conditions such as acute and chronic infections.
ESR
Specific _______ are complex proteins produced by the liver when it is damaged.
enzymes
If a blood sample has a decreased number of normal WBCs, the patient is diagnosed with
leukocytopenia
A ________ is used to separate blood parts from plasma.
centrifuge
A low microhematocrit is seen in patients with
anemia
Patients with _______ have an unusually large number of all blood cells.
polycythemia vera
Blowing on a blood slide smear to help it dry quickly can cause ________ to form.
artifacts
An RBC that is larger than normal is described as
macrocytic
The ________ is the standard unit for reporting PT results; the other method is the time required, in seconds, for a clot to form in a blood specimen.
INR
A test that determines long-range blood glucose control is the ________test.
hemoglobin
Fibrin creates a network of threadlike structures called _________ that begin clot formation.
fibrils
The largest of the Vacutainer tubes typically used for phlebotomy fills to a volume of 10 mL. Approximately ________ tubes are needed to fill a pint (473 mL).
47
________ is the liquid portion of the blood that contains clotting agents.
plasma
The typical site for a capillary puncture in an adult is the _________ finger.
ring
The typical site for a capillary puncture on an infant is the medial or lateral side of the ________.
heel
________ are used for small veins, such as those in the hand or in a pediatric patient.
Butterfly needles
The best prevention for needle-stick injuries after venipuncture is the use of
sesip
A _______ is a special laboratory filter paper that is used to collect a blood sample from newborns.
guthrie card
Leaving a tourniquet on longer than 1 minute greatly increases the chance of
hemoconcentration
A ________is applied to the skin 30 to 60 seconds before the blood draw to prevent infection at the puncture site.
antiseptic
The liquid portion of blood that remains after the blood has clotted in a collection tube is the ________
serum
Using a collection needle with a wider lumen reduces the chance that _______ will occur.
hemolysis
Securing a patient in a blood collection chair helps prevent injuries if the patient experiences
syncope