Test three Flashcards
Which instance most closely resembles basal state?
A patient who has just awakened at 0600 after fasting all night.
A patient who has been lying down for an hour.
A patient who has just arrived for a fasting blood test.
A patient who has worked all night but did not eat at work.
A patient who has just awakened at 0600 after fasting all night.
You most draw a promtime specimen from a patient with IVs in both arms. Which of the following is the best thing to do? Draw the specimen above the IV. Draw specimen below the IV. Draw the specimen from an ankle vein. Draw the specimen from the IV.
Draw the specimen below the IV.
It is not a good idea to collect a CBC specimen from a screaming from a screaming infant because the
white blood count may be falsely elevated.
You have no choice but to draw a specimen from a site with a hematoma.Where should you obtain the specimen?
Distal to the hematoma
Prolonged tourniquet application may cause a change in blood composition primarily because of
hemoconcentration.
Which of the following vascular access devices is placed in a peripheral vein for the purpose of blood collection and administration of medication ? Fistula Heparin lock Implanted port PICC
Heparin lock
A phlebotomist has attempted twice to draw a partial thromboplastin time (PTT) specimen from a patient with difficult veins .Both times the phlebotomist has been able to draw only a partial tube. What should the phlebotomist do?
Have another phlebotomist attempt to draw the specimen .
Why do pregnant patients have lower reference ranges for red blood cell counts?
Body fluid increases in pregnancy,diluting red blood cells.
Levels of which analyte can differ by 50% or more between morning and late afternoon?
Cortisol
Which situation is the best way to tell that you may have accidentally punctured an artery? A hematoma starts to form. The blood obtained is dark red. The blood pulses into the tube. There is no way to tell.
The blood pulses into the tube
If blood is drawn too quickly from a small vein, the vein will have a tendency to ….
Collapse.
how long before obtaining blood for testing should drugs known to interfere with blood test be discontinued?
4-24 hours
A fistula is a(n)…
Permanent fusion of an artery and vein.
When a test requires a fasting specimen, but the serum is _______,it is clue that the patient is not fasting.
Lipemic
Tests influenced by diurnal variation are often ordered as __________ tests, and it is important to collect them as close as possible to the time order.
Timed.
Tattooed areas should be avoided because
Fresh tattoos sites may be more prone to infection
Tattoos can mask an adverse reaction to the draw
There could be an undetected infection in that area
All options are correct.
All options are correct
An arm that is paralyzed has
Lost muscle funstion
Which of the following is the BEST way to avoid reflux when drawing a blood specimen?
Full tubes from bottom up
Do not use overfill additive tubes
Use the correct order of draw
All options are correct
Full tubes from bottom up
If a patient is complaining of sharp radiating pain from the needle insertion site, the phlebotomist should
Immediately terminate venipuncture
Hemolysis can erroneous elevate
Ammonia
Magnesium
Potassium
All options are correct
All options are correct
A tube fails to fill with blood during a venipuncture. Which of the following might lead you to think that the vein has collapsed l?
The vein disappears when you engage the tube
Yeh creatinine rate decrease in elderly patients due to a normal decline in
Kidney function
When the blood from
An ETS tube “backwashes” into the orient is known as _________.
Reflux
Removing blood on a regular basis or in large amounts can lead to ______________.
Iatrogenic
The medical term for fainting is __________. When fainting is due to the action of the vagus nerve on the blood vessels it is called_____________________.
Syncope
Vasovagal syncope
Obstruction or complete stoppage of lymph flow is called__________.
Lymphostasis
A condition in which blood components that cannot easily leave bloodstream become concentrated in the smaller plasma volume is known as ____________.
Hemoconcentration
Peak levels of cortisol normally in the ____________.
The morning
A person who lives on Pike’s peak is more likely to have higher _______ count than a person who lives in Florida.
RBC
A drug known to interfere with a urine test should be discontinued ________ to ___________ hours prior to urine collection
48-72
What is the CLSI recommended maximum depth of heel puncture?
2.0 mm
Why are EDTA SPECIMENS obtained before other specimens when collected by skin puncture?
To minimize the effect of platelet clumping
The purpose of wiping away the first drop of blood from skin puncture is to…
Eliminate tissue fluid contamination
Capillary puncture blood most closely resembles
Arterial blood
What does the term “calcaneus” mean?
Heel bone
Capillary puncture blood reference ranges are higher for what analytes
Gluscos
Which microtube would be used to collect a specimen for CBC?
Purple tube
What is PKU?
A hereditary inability to metabolize phenylalanine
It is necessary to control depth of lancet insertion during capillary puncture to avoid
Injuring the heel bone
What is the purpose of warming the site before skin puncture?
It increase blood flow up to seven times.
Where is the preferred capillary site?
Middle finger
If the alcohol is still wet when a capillary when a capillary puncture is made It can…
All options are correct
What causes a microhematocrit tube to fill with blood
Capillary action
Capillary punctures that are deeper than recommended are more painful because pain increase in abundance below
2.4 mm
Which of the following scenarios represent correct capillary puncture technique
Puncturing perpendicular to fingerprint whorls
Capillary puncture is the preferred method of obtaining blood from infants because
All options are correct
A laboratory report form should indicate when a specimen has been collected by
Some test result vary with specimen source
To make a thick blood smear you should take a large drop of blood and spread it to the size of a ______.
Dime
Fluid that comes from between tissues cells is called_________ fluid.
Interstitial
A capillary puncture site should not appear _________, which is described as being blush from lack of ________.
Cyanotic
Oxygen
A good blood smear covers _____ to ______ of the slide and exhibits a ________edge.
1/2
3/4
Feathered
Capillary bilirubin specimens require protection from ______ so they are typically collected in _____ tubes
Light
Amber
A finger puncture that is______ to the fingerprint whorls is kit proper technique because it allows blood to _______________ the finger.
Parallel
Run down
A metal ______ and a _________ are used to mix a CBG specimen.
Bar
Magnet
__________ can result from heel punctures that are too deep.
Osteochronditis
Why should a lab report form indicate the fact that a specimen has been collected by capillary puncture?
Because test results can vary depending on method of collection
Which of the following is the safest area for infant heel puncture
Lateral plantar surface
A capillary puncture should be done rather than a venipuncture in all of the following situations except when
A light blue top tube is needed
If blood is filling the collection tube very slowly and a hemotomabis beginning to form the phlebotomist should immediately
Remove needle
A blood smear from an edta specimen should be made
Within 1 hour of collection
Why are capillary blood gasses less durable than ABGs
All options are correct
