Blood Collection Techniques

1. Why are gauze pads rather than cotton balls considered a better choice for covering the site while holding pressure following vein puncture?

• A. Gauze pads are made for more sterile

• B. Gauze pads create more pressure

• C. Cotton balls are not as absorbent

• D. cotton fibers tend to stick to the site 

2.The evacuated tube system requires:

• A. A special plastic adapter, a syringe, and an evacuated sample tube

• B. An evacuated sample tube, a plastic adapter, and a double-pointed needle

• C. A double-pointed needle, plastic holder, and a winged infusion set

• D. A special plastic adapter, an anticoagulant, and a double-pointed needle

3. Identify the tubes needed to collect a complete blood count, partial thromboplastin time, and STAT potassium by color and in the proper order of collection for a multi-tube draw.

• A. Lavender top, SST, royal blue top

• B. Gold top, yellow top, light blue top

• C. light blue top, green top, lavender top 

• D. Red top, gray top, light blue top

4. acceptable blood smear:

• A. Covers the entire surface of the slide

• B. Formsa bullet shape

• C. has a feathered uniform edge 

• D. is short and thick

5. For newborns, the penetration depth of lancets for blood collection must be:

• A. 3.0 mm or less

• B. 2.8 mm or less

• C. 2.6 mm or less

• D. 2.4 mm or less

6. Blood collected in a red stopper tube:

• A. May be used for most coagulation

• B. Will not clot

• C. Yields plasma and cells

• D. Yields serum and clotted red cells

7. Which of the following is a commonly used intravenous device that is sometimes used in the collection of blood from patients who are difficult to collect blood by conventional methods? 

• A. Heparinized Natelson tube

• B. BD Unopette

• C. Butterfly needle

• D. BD microtainer

8. All of the following tube stopper colors indicate the presence (or absence) and type of additive in the tube EXCEPT:

• A. Green

• B. Lavender

• C. Light blue

• D. Royal Blue

9. Proper finger puncture technique includes all of the following EXCEPT: 

• A. Avoid squeezing or vigorous massaging

• B. Puncture parallel to the whorls of the fingerprint

• C. Puncture the middle or ring finger

• D. Wipe away the first drop of blood

10. Which of the following procedures does not require cleansing the blood collection site with povidone iodine solution?

• A. Therapeutic drug monitoring collection

• B. Arterial blood collection

• C. Blood culture collection

• D. Blood donation collection