Skill 06[1]..Capillary Blood Draw.pdf

SKILL 6

Capillary Blood Draw (Heel and Finger Stick)

EQUIPMENT

Lancet

Cleansing solution

Cotton balls or 2

NOTE: Use of alcohol for skin preparation may lead to

rapid hemolysis. Povidone-iodine interferes with read-

ings of Chemstrip and Dextrostix.

2 sponges, sterile

6. Let area dry completely before puncture. Damp area

may dilute blood sample or hemolyze it, causing dis-

torted values.

7. Gently massage base of finger or heel, stroking toward

selected puncture site. Do not touch the puncture site.

Massaging increases blood flow to the area. Excessive

squeezing causes bruising, produces a sample that con-

tains more plasma than cells, and can lead to hemolysis,

causing falsely elevated potassium levels.

8. Isolate the puncture site using the nondominant hand to

hold the hand or foot. Hold the selected site in a depen-

dent position. Increases blood supply to the puncture

site. (Figures 9A and 9B)

a. Heel: Support dorsum of foot with thumb and ankle

with other fingers.

b. Toe: Grasp foot across dorsum, support toe with

thumb on plantar surface.

c. Finger: Keep finger to be used extended and pointed

downward.

Gloves, nonsterile

Adhesive bandage

Appropriate sample container

Labels

Completed laboratory requisition forms

GENERAL GUIDELINES FOR SPECIMEN

COLLECTION

1. Check physician’s order. Ensures appropriate specimen

obtained from the correct child.

2. Check child for allergies to any materials used, e.g.,

povidone-iodine.

3. Prepare child and family. Enhances cooperation/partici-

pation; reduces anxiety/fear.

NOTE: Have an assistant hold/comfort the child as nec-

essary and in accordance with agency policy.

4. Gather equipment. Promotes organization and effi-

ciency.

5. Wash hands. Don gloves. Reduces transmission of

microorganisms.

PROCEDURE

1. Steps 1–5 of General Guidelines.

2. Select site.

a. Heel: (Infants younger than 1 year of age): Plantar

surface beyond lateral and medial calcaneous. Avoids

arteries and veins; reduces risk of scar tissue forma-

tion, which may be painful when the infant begins to

walk.

b. Great toe: (children older than 1 year of age).

c. Finger: Side of ball of finger (3rd or 4th finger)

across the fingerprint. Avoids damage to nerve end-

ings and calloused areas of the skin. If stick made

along lines of fingerprint, blood will run down the

finger.

3. Apply moist compress to area for 5–15 minutes:

Facilitates blood supply to the area.

4. Put on nonsterile gloves. Reduces exposure to blood-

borne pathogens.

5. Remove compress and wash selected site with soap and

water or antiseptic solution as specified by agency pol-

icy. Reduces transmission of microorganisms.

FIGURE 9A U-shaped area denotes area

to puncture with lancet.

continued

SKILL 6

Capillary Blood Draw (Heel and Finger Stick)

continued

2 and apply

pressure for 2–3 minutes. Controls bleeding.

14. Apply bandage if appropriate.

NOTE: Use bandage with caution in infant and young

children. Child may aspirate or swallow the bandage.

15. Discard equipment in appropriate container. Consistent

with handling of body fluids.

16. Label specimen, place in appropriate bag or container

along with laboratory requisition slips. Ensures specimen

is properly identified and appropriate test performed.

17. Remove gloves. Wash hands. Reduces transmission of

microorganisms .

18. Send specimens to laboratory.

FIGURE 9B Position that allows blood to

drip.

DOCUMENTATION

1. Time, source/site, specimen sent to lab (specify for what

test).

2. Record results of any test performed on the unit.

9. Using the dominant hand, puncture the site at a 90°

angle to the skin using a quick, forceful motion. Remove

the lancet immediately. Do not use a slashing motion.

Provides blood sample with minimal discomfort to the

child.

10. Wipe away the first drop of blood using a sterile cotton

ball or 2

FIGURE 10 Position used when performing

needle stick.

13. Wipe site with sterile cotton ball or 2

11. Allow blood to collect at puncture site.

12. Collect specimen allowing blood to flow into the collect-

ing tube. (Figure 10)

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