Mid-Term Chapter 31
You need to collect a venous blood specimen from a patient to run a FBG. Which of the following would be an inappropriate statement to make to the patient during this procedure? "Please do not move during this procedure." "This procedure will not hurt." "Which arm was used in the past to draw blood from you?" "When did you last eat or drink?"
"This procedure will not hurt."
Which of the following gauge needles is used most often to perform a routine venipuncture using the vacuum tube method? 25 G 16 G 21 G 18 G
21 G
Your provider has requested an electrolyte profile on a patient. The laboratory directory indicates this test requires 4 mL of serum. Which of the following tubes should be used to collect the specimen? A 4-mL SST A 10-mL SST A 7-mL lavender-stoppered tube A 7-mL SST A 4-mL lavender-stoppered tube
A 10-mL SST
Phlebotomy includes which of the following? Arterial punctures Venipunctures All are correct Skin punctures
All are correct
Which of the following is found in the serum of blood? All are correct Antibodies Hormones Glucose Chloride
All are correct
Which of the following should not be used as a venipuncture site? An area that is painful to the patient Scarred skin Burned skin All are correct Bruised skin
All are correct
Which of the following are characteristics of the brachial artery (located in the antecubital space)? Pulsates when palpated. If punctured, the blood is bright red in color. All are correct. Has a more elastic and thicker wall than a vein. If punctured, the patient feels more than usual amount of pain.
All are correct.
Which of the following may occur if a tourniquet is applied too tightly? It may be uncomfortable for the patient. The venous blood flow may be obstructed. All are correct. The arterial blood flow may be obstructed. Inaccurate test results may occur.
All are correct.
Why should the veins of the hands be used as a venipuncture site only as a last resort? All are correct. They are more difficult to stick. The hand veins are more susceptible to collapsing. They have a tendency to roll. The procedure is more uncomfortable for the patient.
All are correct.
Which of the following techniques can be used to prevent a vein from rolling? Inserting the needle at a 10-degree angle Applying firm pressure below and to the side of the vein Applying the tourniquet tightly Inserting the needle 1/2 inch below the puncture site
Applying firm pressure below and to the side of the vein
Which of the following is the proper method for identifying a patient before performing a venipuncture? State the patient's full name and DOB and ask the patient to verify this information. Ask the patient to state his or her full name and date of last visit. Ask the patient to state his or her full name and DOB. Ask the patient for two forms of written identification.
Ask the patient to state his or her full name and DOB.
What may occur if the needle is removed from the arm before removing the tourniquet? All are correct. Bleeding may occur around the puncture site. The blood specimen may become hemolyzed. The evacuated tube may not fill completely. The patient may experience pain.
Bleeding may occur around the puncture site.
An evacuated tube with a lavender stopper contains: potassium oxalate. nothing. EDTA. heparin. sodium citrate.
EDTA.
How is serum obtained? From whole blood that has been centrifuged From clotted blood that has been centrifuged From whole blood that has been left standing By using a tube containing an anticoagulant
From clotted blood that has been centrifuged
Which of the following should be performed if an evacuated tube contains a clot activator? Centrifuge the tube immediately after drawing it. Fill the tube only half-full with blood. Gently invert the tube five times after drawing it. Store the tubes in the refrigerator.
Gently invert the tube five times after drawing it.
When collecting a venous blood specimen to be transported to an outside laboratory for testing, which of the following should be consulted for information on collecting and handling requirements? Laboratory directory or website Manufacturer's instructions of the test system Medical dictionary Physicians' Desk Reference
Laboratory directory or website
Which of the following sites can be used to make a skin puncture on an adult? Lateral part of the tip of the third finger Lateral part of the tip of the index finger Lateral part of the tip of the little finger Earlobe
Lateral part of the tip of the third finger
What color stopper tube is used to collect a blood specimen for a complete blood cell count (CBC)? Gray Red Light blue Green Lavender
Lavender
What color stopper tube is used to collect a blood specimen for a prothrombin time test? Light blue Gray Green Red Lavender
Light blue
Which of the following antecubital veins is considered the best vein to use for a venipuncture? Median cubital vein Basilic vein Brachial vein Cephalic vein
Median cubital vein
Which of the following results in patient discomfort during the venipuncture procedure? Using the flange to change from one tube to another Removing the needle at the same angle as insertion Moving the needle after it has been inserted into the vein Allowing the alcohol to dry before making the puncture
Moving the needle after it has been inserted into the vein
What may occur if a finger puncture is made that is deeper than 3.1 mm? Inaccurate test results Penetration of the bone Damage to nerves in the finger Excessive bleeding
Penetration of the bone
When performing a venipuncture, which of the following techniques represents a violation of the OSHA standard? Applying the tourniquet 1 inch above the bend in the elbow Recapping the needle after performing a venipuncture Not labeling the blood tube Using a small-gauge needle to collect the specimen
Recapping the needle after performing a venipuncture
Which of the following indicates the correct order of draw for the vacuum tube method of venipuncture? Lavender, red, gray, green Red, gray, lavender, green Red, lavender, gray, green Red, green, lavender, gray
Red, green, lavender, gray
What position should be used for a venipuncture if a patient appears nervous or has fainted in the past from a venipuncture? Semi-Fowler Sitting Prone Sims
Semi-Fowler
Which of the following represents an error in technique when working with evacuated tubes? Filling a tube to the exhaustion of its vacuum Using a computer bar code label to identify the tube Shaking a tube containing an anticoagulant after drawing it Removing the last tube from the plastic holder before removing the needle
Shaking a tube containing an anticoagulant after drawing it
Which of the following veins is most likely to collapse when performing a venipuncture? Veins that roll Small veins Sclerosed veins Scarred veins
Small veins
What may occur if an angle of less than 15 degrees is used to perform the venipuncture? The needle may enter the skin above the vein and not puncture it. The needle may go completely through the vein. The vein may collapse. The needle may penetrate a tendon.
The needle may enter the skin above the vein and not puncture it.
What may occur if an outdated evacuated tube is used to collect the blood specimen? The specimen may become hemolyzed. The test results may be inaccurate. The tube may crack. The tube may no longer have a vacuum.
The tube may no longer have a vacuum.
Which of the following may result in hemolysis of the blood specimen? Allowing the evacuated tube to fill to the exhaustion of the vacuum Storing evacuated tubes at room temperature Using a needle with a small lumen to collect the specimen Removing the needle before removing the tourniquet All are correct
Using a needle with a small lumen to collect the specimen
Which of the following represents an error in technique when obtaining a capillary blood specimen? Warming the patient's finger by massaging it Using the first drop of blood for the test Allowing the antiseptic to dry before making the puncture Making the puncture perpendicular to the lines of the fingerprint
Using the first drop of blood for the test
Which of the following represents an error in technique when selecting a vein for venipuncture? Determining the size and depth of the vein Using the thumb to palpate the vein Examining the antecubital veins of both arms Tracing the path of the vein
Using the thumb to palpate the vein
Which of the following is another name for the butterfly method of venipuncture? Winged infusion method Z-track method Syringe method Luer adapter method
Winged infusion method
After drawing a blood specimen for an electrolyte profile, the next step is to: centrifuge the blood specimen for 10 minutes. place the blood specimen in the refrigerator. allow the blood specimen to stand in an upright position for 30 to 45 minutes. pipet the serum and place it in a transfer tube
allow the blood specimen to stand in an upright position for 30 to 45 minutes.
The size of the evacuated tube you choose to obtain a venous blood specimen depends on the: color of the evacuated tube stopper. patient's clinical diagnosis. amount of specimen required for the test. size of the patient's veins.
amount of specimen required for the test.
When performing a capillary puncture, the finger should not be squeezed, to avoid: diluting the blood sample with tissue fluid. excessive bleeding around the puncture site. exposure of the medical assistant to bloodborne pathogens. bruising of the patient's finger.
diluting the blood sample with tissue fluid.
During the venipuncture procedure, a sudden swelling occurs in the area around the puncture site. You should: immediately remove the tourniquet and then the needle. continue with the venipuncture. call 911. apply pressure to the area with an antiseptic wipe.
immediately remove the tourniquet and then the needle.
Hemolysis of a blood specimen results in: collection of an insufficient quantity of blood. a contaminated specimen. exposure of the medical assistant to bloodborne pathogens. inaccurate test results.
inaccurate test results.
If a fibrin clot forms in the serum layer of a blood specimen, it will: interfere with adequate serum collection. cause evaporation of the serum. lead to inaccurate test results. result in hemolysis of the blood cells.
interfere with adequate serum collection.
When collecting a blood specimen using the vacuum tube method of venipuncture, venous reflux is prevented by: keeping the patient's arm in a downward position. removing the tourniquet before withdrawing the needle from the patient's arm. filling the evacuated tube to the exhaustion of the vacuum. inserting the needle at a 15-degree angle to the patient's arm.
keeping the patient's arm in a downward position.
All of the following are guidelines that should be followed when assembling equipment and supplies for a venipuncture except: check the expiration date of the blood tubes. label each blood tube with one unique patient identifier. do not substitute one blood tube for another. check each blood tube for damage.
label each blood tube with one unique patient identifier.
All of the following tubes can be used to collect serum except: gold-stoppered Hemogard SST tube. red/gray-stoppered SST tube. red-stoppered tube. lavender-stoppered tube.
lavender-stoppered tube.
All of the following are correct techniques for applying a tourniquet except: applying the tourniquet so that it is snug, but not tight. placing the tourniquet 3 to 4 inches above the bend in the elbow. asking the patient to clench his or her fist. leaving the tourniquet on for at least 3 minutes before drawing the specimen.
leaving the tourniquet on for at least 3 minutes before drawing the specimen.
The purpose of applying a tourniquet when performing venipuncture is to: make the patient's veins more visible and easier to palpate. make the procedure more comfortable for the patient. prevent hemolysis of the blood specimen. make it easier to insert the needle.
make the patient's veins more visible and easier to palpate.
An evacuated tube with a red stopper contains: potassium oxalate. heparin. sodium citrate. nothing. EDTA.
nothing.
An individual who collects blood specimens is known as a(n): venipuncturist. optometrist. vampire. phlebotomist.
phlebotomist.
On standing, a blood specimen to which an anticoagulant has been added separates into: plasma, buffy coat, and blood cells. serum, buffy coat, and blood cells. plasma and blood cells. serum and blood cells.
plasma, buffy coat, and blood cells.
You are performing a venipuncture, and the patient becomes dizzy and is about to faint. Your first priority in this situation should be to: place the patient in a reclining position. notify your provider. protect the patient from injury. protect the blood specimen from hemolysis.
protect the patient from injury.
On standing, a blood specimen to which an anticoagulant has not been added separates into: plasma, buffy coat, and blood cells. serum, buffy coat, and blood cells. plasma and blood cells. serum and blood cells.
serum and blood cells.
On palpation, a scarred vein feels: soft and pliable. swollen. elastic and pliable. stiff and hard.
stiff and hard.
If you think a vein selected for venipuncture may collapse, you should: insert the needle slowly into the vein. use the butterfly method to perform the venipuncture. fill the tube only one-half full with blood. use an 18-gauge needle to collect the specimen.
use the butterfly method to perform the venipuncture.
Whole blood is obtained by: using a red-stoppered tube using a tube that does not contain an anticoagulant using a tube containing an anticoagulant centrifuging a clotted blood specimen
using a tube containing an anticoagulant
