Venipuncture by Syringe

Question 1

Syringes are often preferred over an evacuated tube system when drawing blood from patients with small or fragile veins. True or False

Answer 1

True

Question 2

The advantage of this system (by syringe method) is that the phlebotomist is able to control the suction pressure on the vein by slowly withdrawing the syringe plunger. True or False

Answer 2

True

Question 3

Syringes consist of a barrel graduated in milliliters (mL) or cubic centimeters (cc) and a plunger that fits tightly within the barrel, creating a vacuum when retracted. True or False

Answer 3

True

Question 4

Syringes routinely used for venipuncture range from 2 to 25 mL, and a size corresponding to the amount of blood needed should be used. True or False

Answer 4

False - 2 to 20 mL

Question 5

Needle protection devices are

not available for hypodermic syringe needles similar to evacuated tube needles. True or False

Answer 5

False - it is also available

Question 6

Blood drawn in a syringe is immediately transferred to appropriate evacuated tubes to prevent the formation of clots. True or False

Answer 6

True

Question 7

It is acceptable to puncture the rubber stopper with the syringe needle and allow the blood to be drawn into the tube. True or False

Answer 7

False - It is not acceptable to puncture the rubber stopper with the syringe needle and allow the blood to be drawn into the tube.

Question 8

A blood transfer device provides a safe means for blood transfer without using the syringe needle or removing the tube stopper. True or False

Answer 8

True

Question 9

Another advantage when using syringe needles is that blood will appear in the hub of the needle when the vein has been successfully entered. True or False

Answer 9

True

Question 10

It is important that the syringe and tube be held in a horizontal position when using the blood transfer device to prevent the carry-over of anticoagulants or additives from previously filled tubes. True or False

Answer 10

False - vertical

Question 11

Let the vacuum in the evacuated tube draw the appropriate amount of blood into the tube. If there is any extra blood left in the syringe force it into the tube. True or False

Answer 11

False - Discard any extra blood left in the syringe; do not force it into the tube.

Question 12

Unthread the syringe from the blood transfer device. Place the entire assembly in a sharps container. Use a safety needle device with this system. True or False

Answer 12

False - Do not unthread the syringe from the blood transfer device.

Question 13

Venipuncture by syringe can also obtain arterial blood. True or False

Answer 13

False - no

Question 14

Typer of syringe used in venipuncture

Answer 14

Disposable needle for syringe, 21 or 22 gauge

Question 15

The first step of the procedure is to identify the patient. True or False

Answer 15

True

Question 16

Draw the patient’s skin taut with your dominant thumb. The thumb should be 1 to 2 inches (2-5 centimeters) below the puncture site. True or False

Answer 16

False - non-dominant

Question 17

Gently inverting the tube five to eight times provides adequate mixing without causing hemolysis. True or False

Answer 17

True

Question 18

Order of draw according to strasinger

Answer 18

1. Sterile samples (blood cultures)
2. Light blue stopper tubes
3. Lavender stopper tubes
4. Green stopper tubes
5. Gray stopper tubes
6. Red, SST, or orange stopper
   tubes

Question 19

Order of draw according to hoeltke

Answer 19

1. Sterile samples (blood cultures)
2. Light blue stopper tubes
3. Red, SST , or orange stopper tubes
4. Green stopper tubes
5. Lavender stopper tubes
6. Gray stopper tubes

Question 20

When replacing a syringe, it is important to put a gauze underneath the needle o catch blood while making the change. True or False

Answer 20

True