arterial blood leaves the heart through the - ✔✔aorta
low and high controls are required for a glucose meter. these are run - ✔✔exactly the same as
patient samples are run
blood culture collection sites are prepared b
...
arterial blood leaves the heart through the - ✔✔aorta
low and high controls are required for a glucose meter. these are run - ✔✔exactly the same as
patient samples are run
blood culture collection sites are prepared by swabbing the venipuncture site with iodine, which
is left on for at least - ✔✔20 seconds
arterial walls have thick layers of _______ to withstand increased blood pressure during the
contraction phase of the heart and maintain blood flow during its resting phase - ✔✔muscle
what is a normal finding in a plasma speciman - ✔✔light, yellow color
a blood specimen for a 2 hour postprandial glucose test is collected - ✔✔after the patient eats a
meal
a patient has a cast on the left arm and an IV in the right forearm. a venipuncture in the patients
right arm must be done - ✔✔below the IV in a different vein
a specimen for a blood ammonia test is to be preserved from the time of collection until it is
tested in the laboratory. the best course of action is to keep the tube - ✔✔in a cup of ice waterthe performance and speed of centrifuges should be checked - ✔✔every 3 months
the preferred depth of incision for a skin puncture of a premature infant is - ✔✔0.85 mm
the transportation of blood and body fluid specimens by pneumatic tube system - ✔✔is not
recommended
when collecting blood samples from a patient with a venous access device (VAD) - ✔✔discard
the first 5 mL of blood to flush the VAD
a phlebotomist must collect from a patient in isolation with contact precautions. The appropriate
personal protective equipment (PPE) is - ✔✔gloves and gown
whn blood leaves the right ventricle, it enters the - ✔✔right and left pulmonary arteries
when collecting blood from an infant or neonate, the best site for a skin puncture is - ✔✔the
medial or lateral section of the foot
what g value and minimum time are used in a centrifuge to effect good separation of clotted
blood from serum - ✔✔1000 rpm for 10 minutesobese patients may be difficult to draw because their veins can be more difficult to palpate.
excessive probing by the phlebotomist may - ✔✔release some tissue clotting factors
what percentage of water in a human body is found within cells - ✔✔60%
when preparing a site for venipuncture, which of the following is not mandated - ✔✔always start
with using iodine
which of the following is true of veins - ✔✔all veins contain deoxygenated blood
which of the following is not true of arteries - ✔✔arteries have a pulse
concerning the collection of a timed specimen, which of the following is true - ✔✔if a timed
glucose is collected too early, the result could be falsely evaluated
when using vacuum tubes, the proper order of the collection tubes is - ✔✔red, light blue, gel
separator, green
when performing capillary punctures on neonates, the following order of the collection is
mandated - ✔✔hematology, chemistry, blood bank
centrifuges should be checked on a regular maintenance schedule using a tachometer that
registers - ✔✔revolutions per minute (RPM)which of the following is not an acceptable form of identification, with the exception of a patient
with sever burns or a patient in isolation - ✔✔patient name card on the bed or door
which of the following is not standard equipment when performing an arterial puncture for blood
gases - ✔✔tourniquet
which of the following is mandated in preparation of a patient for a glucose tolerance test -
✔✔not fasting for more than 14 hours before the test
which of the following preservatives used in 24 hour urine collection will interfere least with the
dipstick analysis and other urine chemical tests - ✔✔boric acid
a blood sample tested for liver enzymes showed an elevation of all liver enzymes except lactate
dehydrogenase (LDH). this lower result may have been the result of - ✔✔refrigeration of the
blood sample
what is the appropriate procedure for tourniquet use - ✔✔tourniquets must be wiped with 70%
alcohol between patients
the action of sodium polyanethole sulfate (SPS) as an additive to blood culture containers
includes - ✔✔complement inhibitionthe best marker to insure the completeness of a 24 hour urine collection, would be - ✔✔4-
aminobenzoic acid level
which of the following anticoagulants does not bind calcium - ✔✔heparin
which of the following antiglycolytic agents is preferred because it does not intere with urease
and allows the same blood sample to be tested for blood urea nitrogen (BUN) as well as glucose
- ✔✔sodium iodoacetate
when preparing a patients arm for a blood culture collection - ✔✔use iodine first only if the
patient is not allergic to it
the liquid portion of the blood within the body is - ✔✔plasma
the laboratory receives a STAT request for a blood glucose level on a patient in the emergency
department. It is appropriate to - ✔✔treat the request as a medical emergency: collecting and
processing the blood immediately
the best location to perform a dermal puncture for a point-of-care glucose test on an adult is the
tip of the palmar surface of the - ✔✔third or fourth finger
a patient has recently had a radical mastectomy of the right breast. the best site for venipuncture
in this patient is the - ✔✔left armurine begins forming in the _____ where the blood is ______ - ✔✔kidneys; filtered
the length and width of lancet blades are important for assuring an adequate flow of blood and to
- ✔✔prevent injury to the bone
a tourniquet is applied to the arm above a venipuncture site to - ✔✔slow the flow of venous
blood to the heart
which of the following describes the appropriate response by the phlebotomist - ✔✔a patient on
withhold for 8 hours reports drinking water. a blood glucose level was collected, and no report
was added to the requisition
a patients laboratory requisition requests the specimen be collected by fingerstick. the
phlebotomist about to perform the fingerstick notices that the patient's hand feels cold. it is
appropriate for the phlebotomist to - ✔✔warm the patient's skin prior to performing the puncture
skin puncture for neonatal screen specifies that - ✔✔the first drop of blood is wiped away
to prevent tampering and misidentification of samples for legal purposes, everyone who handles
the specimen must provide - ✔✔a documentation of their identity and the date and time the
sample is handled
a neonatal bilirubin specimen should be collected in an - ✔✔amber microcollection tube and
protected from lightpeak and trough specimens are collected for therapeutic drug monitoring. the trough specimen is
typically collected - ✔✔30 minutes before a dose
which of the following is the proper greeting to say when first approaching a patient - ✔✔good
afternoon. im from the laboratory. can you tell me your name please
which of the following best describes the safe operation of a centrifuge - ✔✔tube stoppers are
left on, the centrifuge is loaded by balancing similar tubes, and the lid is closed during
centrifugation
the arteries used for arterial puncture, listed in order of preference are - ✔✔radial, brachial,
femoral
a phlebotomist is asked to assemble the equipment for an arterial puncture. which would be
inappropriate - ✔✔tourniquet
the industry-wide stopper color for tubes chemically clean enough to be used for collecting blood
specimens for the determination of trace elements is - ✔✔royal blue
after centrifuging a green-stoppered tube containing blood to be tested for an electrolyte panel,
the phlebotomist notes that the serum is pink, indicating - ✔✔hemolysis and an unacceptable
specimenwhen a lipid panel is ordered, the patient should be - ✔✔fasting for at least 12 hours, water is
allowed but not caffeine or nicotine
cleaning the urethral meatus, voiding without collection, and collecting the remainder of the
voided urine in a specimen cup - ✔✔clean-catch, midstream urine
the container for a 24 hour urine collection should be - ✔✔labeled and stored in a refrigerator
during the collection of a 24 hour urine, it is important to - ✔✔avoid contamination of the urine
specimen with feces
which blood specimen would be rejected as unsatisfactory - ✔✔a light blue-stoppered tube that
is 1/3 full
after completing venipuncture by evacuated tube, it is appropriate to - ✔✔dispose of the needle
in a nearby sharps container
when collecting blood with a syringe, pulling back quickly and hard on the plunger can -
✔✔collapse the vein and hemolyze the blood
a skin puncture for a CBC is ordered on a newborn. the phlebotomist finds the infant is crying
violently. the phlebotomist should - ✔✔if possible wait until the infant has stopped crying for 1
hourproper placement of the needle within a vein is indicated by all of the following except -
✔✔swelling around the venipuncture site
which of the following represents an inappropriate technique for labeling of blood collection
tubes - ✔✔the phlebotomist labels the vacutainer tubes before calling an outpatient into the
drawing area
all the following terms indicate the patient has had nothing to eat except - ✔✔postprandial
the term for identifying the means of transmission of a contagious disease from its host is -
✔✔chain of infection
the most effective means of preventing the spread of infectious diseases - ✔✔to observe proper
handwashing techniques
the laboratory receives a request to collect 450 mL of blood from a patient with polycythemia.
this blood collection would be called a - ✔✔therapeutic phlebotomy
care in centrifuging, such as elimination splashing or splattering and not popping off tube
stoppers, are designed to prevent the formation of - ✔✔aerosols
a phlebotomist performs a venipuncture without disinfecting the venipuncture site and leaving
the tourniquet on longer that indicated. this would be considered - ✔✔negligencea hematoma may be caused by all the following except - ✔✔holding pressure on the
venipuncture site with the arm straight
the steps to be followed in response to discovering a fire may be remembered by the acronym -
✔✔RACE
a blood sample collected in a tube without anticoagulant would contain - ✔✔serum
a STAT specimen - ✔✔must be collected and tested immediately
what is the guideline for the use of gloves when performing a skin puncture - ✔✔gloves must be
changed between patients
which of the following is true of plasma - ✔✔plasma contains fibrinogen
if a phlebotomist notices a patient eating during a glucose tolerance test the correct procedure
would be to - ✔✔contact the physician to determine if the test should be continued
which of the following is true concerning required neonatal screening for PKU - ✔✔never touch
the filter paper directly to the puncture site
when dealing with forensic samples, the 'chain of custody' would include - ✔✔documentation of
each person who handles the specimenspecimens for which of the following analytes must be protected from light immediately after
collecting - ✔✔bilirubin and carotene
a phlebotomist was scheduled to collect the 2 hour specimen for a glucose tolerance test at
exactly 9am. at 915am the phlebotomist realizes that the specimen has not yet been collected.
what is the appropriate course of action - ✔✔collect the sample as soon as possible and not the
collection time on the tube and laboratory slip
which of the following must be kept at 37 degrees C after collection - ✔✔cold agglutinins and
cryofibrinogen
when filling glass capillary tubes, follow the OSHA recommendation - ✔✔to use glass capillary
tubes wrapped in puncture resistant film
which of the following in not true of pediatric heelsticks - ✔✔the best way to assure a good
blood flow with less injury to the tissue is to perform the heelstick at the same site as a previous
heelstick
which artery should be used when performing an arterial puncture - ✔✔radial
a blood specimen for the following test need not be transported in a mixture of ice and water -
✔✔amylaseif no other site is available it is permissible to collect from an arm with an IV line provided that -
✔✔the sample is collected from below the IV line
when collecting blood for trace metal analysis, which of the following must be observed -
✔✔avoid the use of an anticoagulant that binds metal
a hemolyzed blood sample would have the greatest impact and cause elevated levels of the
following - ✔✔potassium, iron, magnesium
when collecting blood from a patient in reverse isolation, which of the following is true -
✔✔articles removed from the room need not be double bagged
a patient scheduled for a 3 hour glucose test wants to know when the final specimen will be
collected. the fasting specimen was collected at 7am and the patient finished drinking the glucose
solution at 710am. the final specimen will be collected at - ✔✔1010am
when instructing a patient on the proper procedure to use for collection of a mid-stream urine
specimen, which of the following is not mandated - ✔✔the sample should always be the second
voided of the day in order to reduce contamination
instructions for a 24 hour urine collection would indicate the starting time of colletion and
ending time. this means that - ✔✔the patient voids into the toilet and starts the timing with an
empty bladder collecting all subsequent samplesif the phlebotomist were unsuccessful upon a first attempt to collect a blood specimen, the next
step would be - ✔✔to ask the patient if the are willing to allow the phlebotomist to perform a
second attempt
from the standpoint of patient safety, which is the most dangerous practice - ✔✔prelabeling the
vacutainer tubes before collection
which of the following additives is a true anticoagulant - ✔✔sodium citrate
which of the following is true of capillary punctures done on the fingertips - ✔✔insert the lancet
perpendicular to the fingerprint
which of the following is part of the standard protocol when doing a bleeding time - ✔✔a
butterfly-type bandage is used
when collecting blood using a syringe, samples should be placed into evacuated tubes in the
following order - ✔✔blue, lavender, red
the outer layer of the heart is the - ✔✔epicardium
a platelet count of 650,000 per cubic millimeter is termed - ✔✔thrombocytosis
a phlebotomist with 6 collection orders for patients in the hospital receives a handwritten
laboratory order for a STAT glucose after only completing the fourth phlebotomy. thephlebotomist should - ✔✔collect the STAT glucose, deliver it to the lab, then return to perform
the other 2 collections
point-of-care testing (POCT) occurs - ✔✔at the patient's bedside, in the emergency department,
in patients' homes
quality control for point-of-care testing must be performed - ✔✔each day of use
special considerations for phlebotomy on an elderly person would most likely include -
✔✔decreasing the angle of penetration of the venipuncture needle
a body fluid that should be protected from light before analysis for bilirubin is - ✔✔amniotic
fluid
skin puncture on an infant should be done on the plantar surface of the heel, medial to an
imaginary line extending from the middle of the great toe to the heel or lateral to an imaginary
line extending from between the fourth and fifth toes to the heel to avoid injury to the - ✔✔bone
the most important part of the blood collection procedure is - ✔✔skin antisepsis
veins carry - ✔✔deoxygenated blood to the heartwhen collecting blood from an artery for arterial blood gases (ABG), it is not necessary to pull
back on the plunger of the syringe because - ✔✔arterial blood is under pressure from the
contraction of the ventricles
a plasma protein that is not present in serum is - ✔✔fribrinogen
a specimen for a peak gentamincin level should be collected - ✔✔30 to 60 minutes after
administration of the drug
if a patient indicates that he is not fasting, the phlebotomist should - ✔✔ask the patients nurse if
the sample should be collected at this time
when performing a skin puncture, which specimen should be collected last - ✔✔heparin
microcollection tubes
during the venipuncture procedure, place the phlebotomy tray - ✔✔within easy reach on a
bedside table
blood samples collected on filter paper for newborn screening tests should not be hung to dry to
avoid - ✔✔concentration of the blood toward one end of the filter paper
chain-of-custody protocol must be followed when collecting a forensic sample to ensure that -
✔✔the integrity of the specimen is accounted forblood specimens collected for carotene analysis should be - ✔✔protected from light
blood specimens collected for prothrombin time testing must be analyzed within - ✔✔24 hours
of collection
when collecting blood for plasma renin activity testing, the blood must be transported - ✔✔in ice
water
the right ventricle of the heart pumps blood into the - ✔✔lungs
leukocytes are responsible for - ✔✔defending the body against bacteria and viruses
the appropriate course of action for a STAT order is - ✔✔to send the tubes to the laboratory
immediately upon collection
a fingerstick sample for hemoglobin must be collected from a patient whose middle finger is
broken and bandaged. the next best choice for the fingerstick is the - ✔✔ring finger
when testing for a prothrombin time (PT) with a point-of-care (POCT) instrument, the on-board
controls (OBC) will - ✔✔be accepted by a bar code range
a patient who has had a mastectomy cannot have blood collected from the arm on the same side
as the mastectomy due to - ✔✔lymphedoma - swelling of the lymph nodes causing infectionall testing on cerebral spinal fluid (CSP) samples should be performed within 1 hour of
collection because cytolysis is dependent on - ✔✔temperature
a phlebotomist used a vacutainer system to collect blood specimens for the following laboratory
tests: CBC, PT and APTT. the OSHA bloodborne pathogen standard states that - ✔✔both the
needle and holder must be discarded together
collecting blood from a vascular access device can result in - ✔✔colonized bacteria that
accumulate around the line can be pulled into the line when used for a blood collection
a patient had an unsuitable antecuital vein. the next best choice to use for phlebotomy would be
the - ✔✔dorsal side of hand
the left ventricle pumps blood into the heart itself and into the circulation via - ✔✔aortic artery
the principal component of plasma is - ✔✔water
a patient seeks care at the emergency department with a temperature of 101 degrees F. A
thorough history and physical exam revealed no cause for the patient's increased temperature.
blood culture specimens should be collected - ✔✔2 blood cultures at intervals of 45-60 minutes,
2 more at 24-48 hours
a fasting urine specimen is - ✔✔the second voided urine specimen of the dayan activated partial thromboplastin time )APTT) and facter VIII assay are requested on a patient
with hemophilia. the appropriate course of action is to - ✔✔hold pressure on the collection site
for 15-20 minutes
when obtaining a routine blood sample and a vein is not evident, a blood pressure cuff may be
used at the following level - ✔✔60-80
removal of more that 10% of an infant's blood volume at one time may cause - ✔✔cardiac arrest
during a trial in which forensic samples were used as evidence, it was noted that method
validation for linearity limits were not performed for the drug-based testing. the evidence is -
✔✔unacceptable due to questionable linearity limits
a blood sample for carotene analysis should be labeled and - ✔✔wrapped in aluminum foil
when a patient seeks care at the emergency department because of complaints of chest pain,
acute myocardial infarction (AMI) specimens measuring cardiac markers must be collected -
✔✔when the patient arrives, as well as 2-4, 6-8, and 12 hours later
a specimen for a cold agglutinin analysis was collected and placed in a 37 degree C incubator.
the specimen is unacceptable because - ✔✔the sample should have been prewarmed for 30
minutesspecimens for daily chemistry testing were placed into the centrifuge. upon starting to spin, the
centrifuge began to shake. this could be due to - ✔✔an imbalance of tubes
the best way to prevent mislabeling of a tube is to - ✔✔label blood tubes immediately after
collecting
requirements for personal protective equipment (PPE), chemical hazards, reactivity and health
hazards are found in - ✔✔material safety data sheets
the phlebotomist must select the appropriate method of obtaining a blood sample after
considering the patient's - ✔✔age and sample requirements
when preparing to collect a sample for an arterial stick the radial artery can be recognized by -
✔✔its pulse
if a sample is delayed en route to the chemistry laboratory, the glycolytic action of blood cells
will primarily affect tests for - ✔✔glucose, phosphorous, and enzymes
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