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Laboratory & Blood Collection Procedures

phlebotomy
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In a normal hematocrit, the Buffy accounts for ..
Approximately 1% of whole blood
The following is generally used to cleans the skin before drawing blood?..
Alcohol
Inaccurate test results may occur in certain test when what is used to prepare the skin prior to vein puncture...
Alcohol
Part of the preparation for am oral glucose tolerance test?..
Give the pt a high carbohydrate drink immediately after the first blood draw
To prepare the skin before a bien puncture when alcohol causes inaccurate results for certain tests?..
Soap & water
After how many unsuccessful attempts @ obtaining a good blood sample should you seek assistance from your supervisor or the doctor?
2
The best site for drawing blood from an infant is..
The heel
Important when drawing blood from children ?
Gather your supplies and samples quickly as possible to avoid alarming the child with blood-collection tubes
When drawing blood from an elderly pt?
Recognize changes in skin conditions that increase bruising
The most common sites for vein puncture are the
Median cubital and cephalic veins
Blood tests for potassium and sodium identify
Fluid and electrolyte imbalances
An erythrocyte count (RBC) test is used to identify ..
Anemia
A blood urea (BUN) test is used to identify ...
Kidney disorder
Would you include when preparing a venipuncture site?
Cleanse the venipuncture site using a circular motion starting at the center and working outward
When performing a venipuncture using an evacuation system ?
Insert the needle at a 15 angle with the bevel side up
Used in the capillary puncture technique ?..
Lancet
Is characteristic of the capillary puncture ?..
The pt's non-dominant hand is used for this procedure
Which method of drawing blood would you use on a pt with small or fragile veins?
The needle and syringe system
Which procedure for obtaining a blood sample in adults and children is usually performed on the middle or ring finger?
The capillary puncture
Which blood collection device uses interchangeable collection tubes that allow you to draw several blood specimens from the same venipuncture site?
The evacuation system
Which of the following is characteristic of lancets?
They are small disposable instruments with a sharp point used to puncture the skin
A small, calibrated glass tube that holds a precise volume of fluid is called
Micropipette
The normal sodium blood level is
136 - 145 mEq/L
Normal Prothrombin (PT) is
11-15 Seconds
The normal range for Potassium in the blood is..
3.5-5.1 mEq/L
The normal blood glucose level is..
74-120 mg/dl
Which blood test identifies coronary artery disease and atherosclerosis ?..
Total cholesterol
Gout is identified by which type of blood test?..
Uric acid
A puncture resistant, leak-proof container see to dispose of needles, lancets,and other sharp objects is called ..
Sharp container
Factors result in failure to draw blood during venipuncture ?...
Losing the vacuum in the tube, veins are sclerosed, needle inserted through the vein
Enzyme -linked immunosorbent assay (ELISA) and western blot tests are used to confirm which of the following disorders ?
HIV infection
A Substance that when present on the surface of red blood cells cause the formation of antibodies that interact specifically with it are called?
Antigens
The following is a pieces of equipment that allows one to count blood cells by examining a diluted blood sample under a microscope?
Hemocytometer
The following identifies how much of the volume of a sample is made up of red blood cells after the sample has been spun in a centrifuge?
Hematocrit determination
To evaluate the endocrine system, one would...
Analyze hormone levels
Which of the following may cause changes in basal state?
Stress,drugs,exercise,diet
A percentage of each type of white blood cell in a total of 100 white cell observed is referred to as...
A differential
Maintenance @ a specific temperature for a specific amount of time until growth or a reaction occurs is?
Incubation
The general lab centrifugal (GLC) is calibrated every...
6 months
The Ivy method and Duke method are used to measure ..
Bleeding time
An accumulation in the body of substance, known as ketones,which may be detected by testing urine, commonly observed in starvation, pregnancy and diabetes is..
Ketosis
The laboratory test for Prothrombin time would be for..
Evaluating anticoagulant drugs
The laboratory test for cholesterol would be for...
Assessing risk of coronary heart disease
The laboratory test for bleeding time would be for...
assessing hemostasis
The laboratory test for a white blood cell count would be for...
Detecting inflammation or infection
The temperature of the centrifuge is checked at the...
Beginning of each day
The laboratory test for Creatinine would be for..
assessing glomerular filtration rate
For capillary collection from infants, a lancet with which of the following lengths should be used to avoid penetrating the bone?...
1.5 mm
Anticoagulants prevent the blood from..
Forming a clot
If during the course of a venipuncture,the pt starts to bleed severely,you should ..
Apply pressure to the site
For the Surgicutt Bleeding time test, the blood pressure cuff must be inflated on the pt's upper arm to..
40 mm Hg
The phlebotomist would play an active role in pt education for which the following procedures?
24 HR urine samples, urine culture,glucose tolerance test
The laboratory test for hematocrit would be for which of the following?
Aiding in diagnosis of anemia
The laboratory test for a blood culture is used for which of the following?
Diagnose bacteremia
The test that is required to test the pt's insulin releasing mechanism is called...
glucose tolerance
A fasting blood specimen is needed for which of the following clinical laboratory assays?...
Triglyceride, cholesterol
Of the following lab tests, which procedure requires 10mL normal saline and 2 ot 3 - 20 Ml disposable syringes?
Collecting blood through CVC's
The prothrombin in the blood clotting process is dependent upon which of the following?
Vitamin K
The laboratory test for glucose tolerance would be...
Confirming diabetes mellitus, hypoglycemia
Which of the following dyes would be used to test a pt's liver function?
Bromsulphalein dye
Spinal fluid cultures are used to determine ..
Meningitis
A centrifuge is a piece of laboratory equipment used for which of the following?
Hemacytology, spinning test tubes at high speeds, separating the cellular and liquid portions of the blood
Which of the following blood chemical constitutes is light sensitive?
Bilirubin
When blood is collected from a pt, the serum should be separated from the blood cells as quickly as possible to avoid ...
hemoconcentration
Lab results are unreliable if specimens are collected ...
After ingestion of alcohol
Which of the following fluid is extracted from joint cavities?
Synovial fluid
The most common site to perform a venipuncture, or the bend of the arm is called...
Antecubital fossa
A state of abnormal variations is the size of red blood cells in the blood is...
Anisocytosis
The following items are needed to collect a blood culture specimen?
Alcohol preps, iodine scrub swab sticks, disposable gloves
A prolonged bleeding time for a pt may be caused by the pt's intake of ...
Mithramycin, dextran, aspirin
If a blood specimen is allowed to clot, without added anticoagulant, this is what remains: ...
serum, blood cells, fibrin clot
Why is it necessary to control the depth of a lancet insertion during skin puncture?
To avoid excessive bleeding
Which of the following conditions listed affect laboratory tests on blood specimens?
Altitude, needle inserted through the vein, humidity
Hemoconcentration can be caused by ..
Squeezing or probing the site, long term IV therapy, tourniquet left on for extended periods
A light colored layer of leukocytes and platelets which forms on the top of the red cell layer when a sample of blood is centrifuged or allowed to stand...
Buffy coat
Two primary tests for platelet activity are the bleeding time, which is used to assess platelet function,and platelet count, which evaluates platelet production ...
Bleeding and platelet
What effects does warming the site have on venipuncture?
Increases localized blood flow
Hematoma during venipuncture results from which of the following?
Needle bevel is partially inserted in the vein
Of the following veins, which would be most frequently used for venipuncture ?
median cubital vein
The test that requires passing a tube through the pt's nose is called
Hollander test
The laboratory test for sedimentation rate is described as...
The time required for erythrocytes to settle to the bottom of an upright tube @ room temperature ...
Which of the following are tourniquets used in venipuncture?
Rubber hose, blood pressure cuff
If a tube of blood is allowed to stand undisturbed, it will separate into...
3 Major components
Serum that contains antibodies is referred to as
Antiserum
The rapid sequence of vascular spasms, plug formation and coagulation is known as
Homeostasis
How many counting chambers are used to count white blood cells?
4
Which of the following would be reason to reject a specimen for testing?...
Use of expired collection tubes, unlabeled specimen,discrepancies on the requisition
Of the following, which is not considered a time blood specimen
Cortisol
The normal pH of blood is
About 7.4
An instrument which can be used to determine the concentration of a solution by measuring the light transmitted or absorbed by the solution is called
A spectrophotometer
A measurement of density is called
Specific density
A labeled specimen must include...
name and ID #, date and time, time of collection
On a typical microcollection tray you would not find...
A pt's id
A temperature controlled chamber into which inoculated media is placed so that bacterial growth will occur is called a/an
Incubator
The Complete Blood Count (CBC) includes which of the following tests?
Hgb, Hcr or crit, RBC
What is the best angel for a needle insertion during venipuncture?
15*degrees
Why does blood separate into 3 layers when centrifuged?
Their various densities
To help minimize dizziness or fainting, blood donors should eat within six hrs of donating blood ...
6
What test may be affected most if the pt is not fasting?
glucose and triglycerides
Hemoguard is a type of ...
sheath
The most common antiseptic for a routine blood draw is...
70% Isopropyl alcohol
The needle gauge with the smallest diameter is...
23
Needles are coded according to ...
Gauge
Which of the following is not skin puncture equipment?
Forceps
The most common skin test preformed is..
PPD
A prolonged bleeding time is I indicative of...
Low platelet count
A series of tests measuring enzymes released into the blood after a heart attack is...
Serum enzyme test
What is a reference point with which test results are compared?
None of these choices: basal state, thromboplastin time, differential
When performing an arterial puncture, you should: ..
None of these choices ^_~ : apply pressure to the site for 3 min after collection, not apply pressure on the site after collection, apply pressure on the site for 15 min after collection.
The bevel of the needle should be in which position before entering the vein?
upward
when drawing a specimen to test blood alcohol, the site cannot be prepared with ...
alcohol
what is the ACT used to determine?..
monitoring heparin therapy
A retractable sheath is part of a...
multiple draw needle
what is the special winged needle set that can be left in a pt's vein for up to 48 hrs and is used to administer medication and draw blood?..
heparin lock
what is the name of the small metal bar that is inserted into the tube after collection of a capillary blood gas specimen used to aid in mixing the anticoagulant by means of a magnet?..
flea
Pathogenic bacteria or blood poisoning in the blood is called..
septicemia
what is the Allen test used to determine?..
the presence of circulation
If a hematoma starts to form during the course of a phlebotomy, which of the folowing should be done?..
remove needle and apply pressure to the site
In arterial blood gas procedure for adults, which of the following anticoagulants is added to coat the syringe barrel? ..
Heparin
For an ABG collection, what is the required amount if sample?..
1mL
The following complications could be associated with the collection of arterial blood gas?..
Infection, Arteriospasm, Hematoma
What should be the minimum volume of the capillary tube used to collect a specimen for cpillary blood gas analysis?..
.25 mL
When using a pusher slide, which is the correct angle?..
30 degrees
Which blood test usually does not require skin puncture?..
Glucose
The following test uses a tamplate instrument to obtain blood for testing platelet integrity?..
bleeding time
What is the name of the compatibility test performed before a unit of blood is determined to be suitable for transfusion?...
crossmatch
A test of the body's ability to absorb and utilize a particular substance is which of the following?..
tolerance
Which method is the most common bleeding time test?
Surgicutt
Which of the following methods is used for detecting meningitis?..
spinal fluid culture
The act by which a fluid will enter a tube or pipet because of the attraction between the glass and the liquid is?..
aspiration
A measure of the diamter of needles is?..
gauge
A hematocrit performed on a small sample if blood is ...
microhematocrit
The following is used in bedside glucose testing?..
acu-check II, iascan, glucocheck
What is a commonly identified pathogenic agent causing skin nosocomial infections?
candida albicans
The Following is not included in testing for blood gas assay?..
H2O
A blood collection vacuum tube part of the
B-D Vacutainer
The following sites is not recommend to collect capillary blood gases?
Lateral anterior area of the elbow
Therapeutic phlebotomy is used in the treatment of
Polycythemia
Which of the following blood analysis has a rise and fall in values with the time of the day, and thus must be collected on time
Cortisol
Lancets with which of the following maximum lengths are suitable for older children
5mm
The value of total protein test due to prolonged use of a tourniquet can produce change in
Hemoconcentration
Venipuncture at sites with each of the following could affect test results except
Near a tattoo
Phlebotomy needles should be stored
@ room temperature
What gauge needle are commonly used for phlebotomy
21 Gauge
If a problem occurs during collection,
Do not use an IV line
Cholesterol and _ could be tested from the same tubes
TSH
Serum glucose and _ could not be tested from the same tube
PT
Which of the following assays is preformed in the immunohematology section
direct Coombs test
Therapeutic drug monitoring usually is preformed
Clinical chemistry
The ova and parasite procedure is usually preformed in the
Clinical microbiology section
A skin puncture on an infants heel should not be more than
2.4mm
Best angel for spreading a blood smear using two glass slides is
30 degrees
For the Surgicutt bleeding time test, the blood pressure cuff must be inflated on the pt's upper arm to
40 mm Hg
What is the usual dose of D-xylose administered to the patient in the D-xylose tolerance test
25 g
Which of the following is obtained through a lumber puncture
cerebrospinal fluid
The NCCLS order of draw using conventional stoppers is
Yellow-red-light/blue-red/gray-green/gray-green-lavender-gray
The NCCLS order of draw using vacutainer tubes with Hemoguard closure
sterile-red-light blue-gold-light green-green-lavender-gray
The alternate syringe order of draw is
Sterile-light blue-lavender-green-Gary-red
Yellow stoppered tubes are used for
blood culture
Sodium heparin is the anticoagulant found in which color tube
Green
The pink plastic vacutainer contains
K2EDTA
The royal blue vacutainer contains the additive
Sodium heparin
The orange vacutainer contains the additive
Thrombin
Glucose determinations are done in a collection tube with a
Gray stopper
Sodium citrate is in the
light blue stopper tube
Blood grouping,typing and AIDS antibody test is preformed with a
Red stopped / glass tube
Red topped / glass tubes contain
No additives
The CBC ( which includes the hematocrit is collected with
Lavender evacuated tube
When blood is collected from a pt with syringe, and needs to be transferred to an evacuated tube, the phlebotomist should never push the blood into the tubes, because it will cause
hemolysis