Chapter 31 MA

What position should be used for a venipuncture if a patient appears nervous or has fainted in the past from a venipuncture?

Semi-Fowler

On standing, a blood specimen to which an anticoagulant has NOT been added separates into

Serum and blood cells

Which of the following is the proper method for identifying a patient before performing a venipuncture?

Ask the patient to state his or her full name and DOB

Which of the following represents an error in technique when selecting a vein for venipuncture? A. Examining the antecubital veins of both arms B. Using the thumb to palpate the vein C. Determining the size and depth of the vein D. Tracing the path of the vein

B

Which of the following results in patient discomfort during the venipuncture procedure? A. Allowing the alcohol to dry before making the puncture B. Moving the needle after it has been inserted into the vein C. Using the flange to change from one tube to another D. Removing the needle at the same angle as insertion

B

What may occur if the needle is removed from the arm before removing the tourniquet?

Bleeding may occur around the puncture site

All of the following are correct techniques for applying a tourniquet except A. Placing the tourniquet 3-4 inches above the bend in the elbow B. Asking the patient to clench his or her fist C. Applying the tourniquet so that it is snug, but not tight D. Leaving the tourniquet on for at least 3 minutes before drawing the specimen

D

Which of the following antecubital veins is considered the best vein to use for a venipuncture? A. Basilic vein B. Cephalic vein C. Brachial vein D. Median cubital vein

D

When performing a capillary puncture, the finger should NOT be squeezed, to avoid

Diluting the blood sample with tissue fluid

How is serum obtained?

From clotted blood that has been centrifuged

Which of the following should be performed if an evacuated tube contains a clot activator?

Gently invert the tube five times after drawing it.

Hemolysis of a blood specimen results in

Inaccurate test results

If a fibrin clot formed in the serum layer of a blood specimen, it would

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

What color stopper tube is used to collect a blood specimen for a prothrombin time test?

Light blue

The purpose of applying a tourniquet when performing venipuncture is to

Make the patient's veins more visible and easier to palpate

What may occur if a finger puncture is made that is deeper than 3.1 mm?

Penetration of the bone

An individual who collects blood specimens is known as a(n)

Phlebotomist

On standing, a blood specimen to which an anticoagulant has been added separates into

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

Protect the patient from injury

Which of the following indicates the correct order of draw for the vacuum tube method of venipuncture?

Red, green, lavender, gray

When performing a venipuncture, which of the following techniques represents a violation of the OSHA standard?

Removing the plastic holder from the needle for reuse

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.

Which of the following may result in hemolysis of the blood specimen?

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?

Using the first drop of blood for the test

anti-

against

Phlebotomy includes which of the following? A. Skin punctures B. Arterial punctures C. Venipuncture D. All of the above

all of the above

ante-

before

hemat/o

blood

oste/o

bone

myel/o

bone marrow

lysis

breakdown

chondr/o

cartilage

-otomy

incision

An evacuated tube with a red stopper contains?

nothing

On palpation, a scarred vein feels

stiff, hard

-oma

tumor, swelling

Whole blood is obtained by

using a tube containing an anticoagulant

phleb/o

vein

All of the following tubes can be used to collect serum except A. Lavender-stoppered B. Red/gray-stoppered SST C. Gold-stoppered Hemogard SST D. Red-stoppered

A

Which of the following is another name for the butterfly method of venipuncture? A. Winged infusion method B. Syringe method C. Luer adapter method D. Z-track method

A

Which of the following techniques can be used to prevent a vein from rolling? A. Applying firm pressure below and to the side of the vein B. Applying the tourniquet tightly C. Inserting the needle at a 10-degree angle D. Inserting the needle 1/2 inch below the puncture site

A

After drawing a blood specimen for an electrolyte profile, the next step is to

Allow the specimen to stand in an upright position for 30-45 minutes

The size of the evacuated tube you choose to obtain a venous blood specimen depends on the

Amount of specimen required for the test

Which of the following gauge needles is used most often to perform a routine venipuncture using the vacuum tube method? A. 16 G B. 18 G C. 21 G D. 25 G

C

Which of the following represents an error in technique when working with evacuated tubes? A. Using a computer bar code label to identify the tube B. Filling tubes to the exhaustion of the vacuum C. Shaking a tube containing an anticoagulant after drawing it D. Removing the last tube from the plastic holder before removing the needle

C

You need to collect a venous blood specimen from a patient to run an FBG. Which of the following would be an inappropriate statement to make to the patient during this procedure? A. "Which arm was used in the past to draw blood from you?" B. "Please do not move during this procedure." C. "This procedure will not hurt." D. "When did you last eat or drink?"

C

Your physician 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. A 4-mL SST B. A 7-mL SST C. A 10-mL SST D. A 4-mL lavender-stoppered tube E. A 7-mL lavender-stoppered tube

C

All of the following are guidelines that should be followed when assembling equipment and supplies for a venipuncture except A. Check each blood tube for damage. B. Do not substitute one blood tube for another. C. Check the expiration date of the blood tubes. D. Label each blood tube with one unique patient identifier.

D

Which of the following are characteristics of the brachial artery (located in the antecubital space)? A. Pulsates when palpated B. Has a more elastic and thicker wall than a vein C. If punctured, blood is bright red in color D. If punctured, patient feels more than usual amount of pain E. All of the above

E

Which of the following is found in the serum of blood? A. Glucose B. Hormones C. Chloride D. Antibodies E. All of the above

E

Which of the following may occur if a tourniquet is applied too tightly? A. It may be uncomfortable for the patient. B. Inaccurate test results may occur. C. The arterial blood flow may be obstructed. D. The venous blood flow may be obstructed. E. All of the above

E

Which of the following should NOT be used as a venipuncture site? A. Scarred skin B. Bruised skin C. An area that is painful to the patient D. Burned skin E. All of the above

E

An evacuated tube with a lavender stopper contains

EDTA

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

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

Which of the following sites can be used to make a skin puncture on an adult?

Lateral part of the third fingertip

What color stopper tube is used to collect a blood specimen for a complete blood cell count (CBC)?

Lavender

Which of the following is NOT a method for performing venipuncture? A. Butterfly method B. Syringe method C. Retractable lancet method D. Vacuum tube method

Retractable lancet method

Which of the following veins is most likely to collapse when performing a venipuncture?

Small veins

What may occur if an outdated evacuated tube is used to collect the blood specimen?

The tube may no longer have a vacuum.

Why should the veins of the hands be used as a venipuncture site only as a last resort?

They have a tendency to roll. They are more difficult to stick. The procedure is more uncomfortable for the patient. The hand veins are more susceptible to collapsing.

If you think a vein selected for venipuncture may collapse, you should

Use the butterfly method to perform the venipuncture

-itis

inflammation

-ous

pertaining to