Deck 10: Dermal Puncture

Question 1

How long should a heel warmer be applied to an infant's heel?

A) 30 seconds
B) 1 to 3 minutes
C) 3 to 5 minutes
D) 10 minutes

Answer 1

C

Question 2

Puncture of a bone during dermal puncture can result in what potentially serious and sometimes fatal bone infection?

A) Osteochondritis
B) Osteomalacia
C) Osteomyelitis
D) Osteoporosis

Answer 2

C

Question 3

Which of the following has higher levels in capillary blood than in venous blood?

A) Calcium
B) Chloride
C) Glucose
D) Sodium

Answer 3

C

Question 4

Betadine may elevate results of which tests if used to clean the skin for a dermal puncture?

A) Bilirubin, acid phosphatase, potassium, sodium
B) Bilirubin, uric acid, phosphorus, potassium
C) Sodium, potassium, chloride, bicarbonate
D) Glucose, BUN, creatinine, uric acid

Question 5

Which of the following should be the first test to be collected in a dermal puncture?

A) Blood smears
B) CBC
C) Hemoglobin
D) Glucose

Question 6

Which of the following is an acceptable step during collection of blood by dermal puncture?

A) Constantly massage near the site to keep the blood flowing.
B) Keep the finger upright and collect as the blood flows downward.
C) Wipe away the first drop of blood with an alcohol pad.
D) Wipe away the first drop of blood with a dry, clean gauze pad.

Question 7

Which of the following over-the-counter medications is known to increase bleeding times?

A) Aspirin
B) Benadryl
C) Tums
D) Tylenol

Question 8

Which of the following bones is close to the surface and at risk of being damaged during a heel puncture?

A) Calcaneus
B) Metatarsal
C) Navicular
D) Tarsal

Question 9

What is the maximum acceptable depth for a heel puncture?

A) 1 mm
B) 2 mm
C) 3 mm
D) 4 mm

Question 10

Which of the following tests cannot be collected using a dermal puncture?

A) Blood cultures
B) CBC
C) Glucose
D) Sodium

Question 11

What is the preferred method of blood collection in newborns and infants?

A) Arterial sample
B) Dermal puncture
C) Hand vein with butterfly needle and syringe
D) Routine venipuncture of median cubital vein

Question 12

Which of the following has higher levels in venous blood than in capillary blood?

A) Calcium
B) Chloride
C) Glucose
D) Sodium

Question 13

Which of the following is an appropriate dermal puncture site for adults?

A) Fleshy center of thumb
B) Thumb side of index finger
C) Ring finger, perpendicular to the ridges
D) Middle finger, parallel to the ridges

Question 14

Which of the following is the appropriate site for dermal puncture on an infant's foot?

A) Rear part of the arch of the foot
B) Medial and lateral borders of plantar surface
C) Fatty part of the middle toe
D) Center of the plantar surface

Question 15

What is the maximum acceptable depth for a dermal puncture on an adult?

A) 1 mm
B) 2 mm
C) 3 mm
D) 4 mm

Question 16

Which of the following is the preferred collection site for laboratory testing of a patient at high risk for venous thrombosis?

A) Arterial sample
B) Dermal puncture
C) Hand vein with butterfly needle and syringe
D) Routine venipuncture of median cubital vein

Question 17

Which antiseptic may affect the results of tests for bilirubin, uric acid, potassium, and phosphorus from a dermal puncture and therefore should not be used on a dermal puncture?

A) Isopropyl alcohol
B) Chlorhexidine gluconate
C) Povidone-iodine
D) Sodium chloride

Question 18

What is the maximum acceptable width for a dermal puncture?

A) 0.5 mm
B) 1.0 mm
C) 2.4 mm
D) 4.0 mm

Question 19

What is the recommended depth for a heel puncture on a premature infant?

A) 0.65 to 0.85 mm
B) 1.0 to 1.5 mm
C) 1.5 to 2.0 mm
D) 2.5 to 3.0 mm

Question 20

Which screening test measures the overall integrity of primary hemostasis?

A) APTT
B) Bleeding time
C) FDP
D) PT

Question 21

Which of the following is a part of proper technique when performing a bleeding time test?

A) Press the cutting device on the arm until the skin indents slightly.
B) Start the timing after the first drop of blood forms on the incision.
C) Touch the incision with filter paper every 30 seconds to blot blood.
D) Record the time when blood is no longer absorbed by the filter paper.

Question 22

What is the usual site for performing a standard bleeding time test?

A) Earlobe
B) Finger
C) Forearm, just below antecubital crease
D) Forearm, just above the wrist

Question 23

When performing a bleeding time test, to what pressure should the blood pressure cuff be inflated?

A) 10 mm Hg
B) 40 mm Hg
C) 70 mm Hg
D) 100 mm Hg

Question 24

Which of the following would be interpreted as a normal bleeding time?

A) 1 minute
B) 6 minutes
C) 12 minutes
D) 20 minutes

Question 25

At what intervals should blood be wicked with filter paper when performing a bleeding time test?

A) 15 seconds
B) 30 seconds
C) 45 seconds
D) 60 seconds

Question 26

Bedside glucose testing is usually performed on patients with what condition?

A) Diabetes
B) Hemophilia
C) Kidney failure
D) Liver disease

Question 27

A heparin-coated micropipet tube is used primarily for dermal puncture when collecting which test?

A) Blood gases
B) CBC
C) Glucose
D) Platelet count

Question 28

A micropipet tube that has a blue band on it contains what type of anticoagulant?

A) EDTA
B) Heparin
C) Sodium citrate
D) None

Question 29

Which of the following is the standard incision size for a bleeding time test?

A) 0.1 mm deep by 5.0 mm long
B) 1.0 mm deep by 5.0 mm long
C) 0.5 mm deep by 1.0 mm long
D) 5.0 mm deep by 0.1 mm long