The preanalytical phase of the testing process begins for the laboratory when a:
D. Test is ordered by a patient's physican.
Most reference ranges are based on normal laboratory test values for:
B. Healthy people
Diurnal variations associated with some blood components are:
C. Normal fluctuations throughout the day
A patient's arm is swollen. The term used to describe this condition is:
Lipemia results from:
A. High fat content of the blood
A patient with a high degree of jaundice typically has:
D. Yellow skin and sclerae
B. Obstruction of the flow of lymph
This is the medical term for a nervous system response to abrupt pain, stress, or trauma:
C. Vasovagal syncope
Small non-raised red spots appear on the patient's skin below where the tourniquet has just been tied. What are they and what causes them?
D. Petechiae due to capillary or platelet defects
Venous stasis is:
C. Stoppage of the normal venous blood flow
A hematoma is a:
C. Swelling or mass of blood
Mastectomy is the medical term for breast:
C. Life-threatening loss of blood
Which of the following is a product of the breakdown of red blood cells (RBCs)?
A vein that is thrombosed is:
A patient goes into convulsion while you are drawing his blood. The last tube has just started to fill. Which of the following is wrong thing to do?
A. Complete the draw as quickly as you can
The patient has an IV in the left forearm and a large hematoma in the antecubital area of the right arm. The best place to collect a specimen by venipuncture is the:
C. Right arm distal to the hematoma
Which of the following is not true of hematomas?
D. All of the above are correct
Hemoconcentration from prolonged tourniquet application increases:
B. Non-filterable analytes
Which of the following is the medical term for fainting?
In which instance is the patient closest to basal state? The patient who:
D. Is awakened for a blood draw at 0600 after fasting since 0800 last night
The best specimens to use for establishing inpatient reference ranges for blood tests are:
A. Basal- state specimens
Which test requires the patient's age in calculating results?
D. Creatinine clearance
Which of the following tests is most affected by altitude?
D. RBC count
Persistent diarrhea in the absence of fluid replacement may cause:
The serum or plasma of a lipemic spcimen appears:
A. Cloudy white
A lipemic specimen is a clue that the patient was probably:
D. Not fasting
A 12-hour fast is normally required in testing for this analyte:
This blood component exhibits diurnal variation, with peak levels occurring in the morning:
Test influenced by diurnal variation are typically ordered:
A drug known to interfere with a blood test should be discontinued for this many hours before the test ranges for RBC counts?
A test result can be falsely decreased if:
A. A drug competes with the test reagents for the test analyte
Which of the following analytes can remain elevated for 24 hours or more after exercise?
Which hormone is most affected by presence of a fever?
Which analyte has a higher reference range for males than for females?
An icteric blood specimen indicates that:
A. Bilirubin test results could be elevated
What changes occur in the bloodstream when a patient goes from supine to standing?
A. Non-filterable elements increase
Why do pregnant patients have lower reference ranges for RBC counts?
B. Increased body fluids result in the dilution of the RBC'S
Which of the following analytes is typically increased in chronic smokers?
It is not a good idea to collect a cbc from a screaming infant because the:
D. WBCs may be temporarily elevated
Of the following factors known to affect basal state, which is automatically accounted for when reference ranges are established?
D. Geographic locale
Temperature and humidity control in a laboratory is important because it:
B. Maintains the integrity of specimens
Scarred or burned areas should be avoided as blood collection sites because:
B. Circulation is typically impaired
A vein that feels hard, cord-like, and lacks resiliency is most likely:
Drawing blood from an edematous extremity may cause:
A. Erroneous specimen results
If you have no choice but to collect a specimen from an arm with a hematoma, collect the specimen:
C. Distal to it
One reason collecting blood specimens from an arm on the same side as a masterectomy without permission from the patient's physician is prohibited is because:
C. Tourniquet application may injure it
Which of the following veins if often the easiest to feel on obese patients?
You must collect a protime specimen from a patient with IV's in both arms. The best place to collect the specimen is:
B. Below one of the IV's
A phlebotomist must collect a hemoglobin specimen from a patient in the ICU. There is an IV in the patient's left wrist. There is no suitable antecubital vein or hand vein in the right arm. What should the phlebotomist do?
D. Perform a fingerstick on the right hand
In selecting a venipuncture site, do not use an arm with
B. an active av shunt or fistula
A type of line commonlyt used to monitor blood pressure and collect blood gas specimens is
A. an A-line
A vascular access pathway that is surgically created to provide access for dialysis is
A. an AVshunt
When blood specimaen is collected from a heprin lock, it is important to draw
A. a 5-ml, discard tube before the specimen tubes are filled
A which of the following is a type of CVC
A subcutaneous vascular access consisting of a small chamber attached to an indwelling line that is implanted under the skin and located by palpating the skin is
B. an implanted port
The way to bandage a veinpuncture site when the patient is allergic to the glue in adhesive bandages is to
D. wrap it with self-adhering material
You may have to be careful about what type of equipment is brought into the room if a patient is severely allergic to
What is the best thing to do if A veinpuncture site continues to bleed after 5 minutes
C. report it to the patients physician or nurse
Which patient should beasked to lie down during a blood draw? A patient with a
C. history of syncope
During a blood draw, a patient says he feel faint. What should the phlebotomist do?
B. discontinue the draw and lower his head
An outpatient becomes sweak and pale after a blood draw. What should the phlebotomist do?
B. havee the patient lie down until recovered
If an outpatient tells you before a blood draw that she is feeling nauseated, you should
A. advise her to begin slow,deep breathing
Pain associated with venipuncture can be minimized by
B. putting the patient at ease with a little small talk
A site could potentially be used for venipuncture even if
A. petechiae appear below the tourniqet
A vein with walls that have temporarily drawn together and shut off blood flow during venipuncture is called a
B. collapsed vein
Which of the following can cause a hematoma to from during venipuncture procedures?
B. failing to apply adequate pressure after the draw
Which of the following is the best indication that you have accidentally punctured an artery?
C. blood pulses into the tube
Anemia brought on by the with drawal blood for testing purposes is described as
If you suspect that you have accidentally collected an arterial specimen instead of a venous specimen
D. see if the lab will accept it and if so label it as possibly an arterial specimen
Infection of a venipuncture site can result from
C. touching the site after cleaning it
Blind or deep probing for a vein can result in
A. an arterial puncture
A patient complains of marked pain when you insert the needle. The pain radiates down his arm and does not subside. What should you do?
C. discontinue the venipuncture immediately
A stinging sensation when the needle is first inserted is the most likely the result of
B. not letting the alcohol dry thoroughly
Which is the best way to avoid reflux
D. make certain that tubes fill from the bottom up
Which of the following is least likely to impair vein patency
B. leaving a tourniqet on too long
Prolonged tourniquet application can affect blood composition because it causes
The serum or plasma of a hemlyzed specimen appears
D. pink or reddish
which action is least likely to cause specimen hemolysis?
D. transferringblood from a syringe to a tube
The ratio of blood to anticoagulant is most critical for which of the following tests
Which of the following situations is least likely to cause contamination of the specimen
A. cleaning a finger stick site with isopropyl alcohol
You are collecting a blood specimen the needle is in the vein and blood flow has been established ..as the tube start filling you hear a hissing sound there is a spurt of blood into the tube and blood flow stops ..what most likely happened is that the
A. bevel came out of the skin and the tube vacum escaped
A needle that has gone thru the back wall of the vein may cause
B. blood to enter the tube slowlyn or not at all
When a vein rolls, the needle typically
D. slipps beside instead of in the vein
You are in the process of collecting a blood specimen. The needle is inserted but the tube is filling very slowly. A hematoma starts to for rapidly, what has most likely happened is
A. needle is only partly inthe vein
Which of the following is most apt to be the cause of vein collapse during venipuncture
D. tube vacum is too large for the size of the vein