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Which of the following statements most accurately describes capillary puncture blood?
A mix of venous, arterial, and capillary blood
Referring to fig. 10-1, identify the letters of the fingers that are recommended as sites for capillary puncture:
C and D
Which numbered arrows on the diagram of an infant's foot in Fig. 10-2 point toward the safest areas for capillary puncture?
3 and 4
Which of the following are required characteristics of capillary puncture lancets?
All of the above: A controlled depth of puncture, Blades or points that are sterile, permanently retractable blades
Which of the following equipment is used to collect a manual packed cell volume test?
Which of the following equipment should be deleted from a list of capillary blood gas equipment?
Filter paper for blotting
A laboratory report form should state that a specimen has been collected by capillary puncture:
Because results can vary by specimen source
Blood collected by puncturing the skin is called capillary blood because:
It is from the dermal capillary bed
You need to collect blood cultures, and green, light blue, and purple top tubes on an adult with difficult veins. Which of these can be collected by skin puncture?
Green top and purple top
If collected by capillary puncture, which of the following specimens should be collected in an amber microtube?
Situations that require a venipuncture instead of capillary puncture include when a:
Light blue top tube has been ordered
Which of the following patient conditions would make capillary puncture a good choice for specimen collection?
Which of the following is normally a proper site for finger puncture on an adult?
Distal segment of the middle finger
Which of the following would be excluded form a list of reasons why capillary puncture is the preferred method to obtain blood from infants and children?
Results on capillary specimens are more accurate
Which of the following sites would normally be eliminated as a capillary puncture site?
Index finger of a woman
It is necessary to control the depth of lancet insertion during heel puncture to avoid:
Injuring the calcaneus
Which of the following is the safest area of an infant's foot for capillary puncture?
Medial plantar heel
A recommended capillary puncture site on children 2 years of age or older is on the:
Pad of a middle finger
In which of the following areas does capillary specimen collection differ from routine venipuncture for tests that can be collected either way?
Order of draw
The distance between the skin surface and the bone in the end segment of a finger is:
Shortest at the side and the tip
A capillary puncture that parallels the whorls of the fingerprint will:
Allow blood to run down the finger
If the following tests are collected from a patient by capillary puncture, which test specimen is collected first?
CBC: Bilirubin, CBC, Lytes, Glucose
The antiseptic must be completely dried before performing capillary puncture to avoid:
Test affected by povidone-iodine contamination of a capillary specimen include:
All of the above; Phosphorus, Potassium, Uric Acid
Errors in capillary glucose results have been attributed to:
Isopropanol contamination of the specimen
One purpose of wiping away the first drop of blood (fig. 10-4) during capillary specimen collection is to:
Reduce tissue fluid contamination
Which of the following actions taken while filling microcollection tubes would be considered incorrect technique?
Scooping up blood as it runs down the finger
Which of the following would be least likely to introduce excess tissue fluid into a capillary puncture specimen?
Wiping the alcohol dry
Which of the following can result in microclot formation in a specimen collected in an anticoagulant microtube?
Overfilling the tube
During multisample capillary specimen collection, blood smears and edta specimens are obtained before other specimens to minimize:
Effects of platelet aggregation
When making a blood smear by hand using two glass slides, the typical angle required of the spreader slide is:
If the phlebotomist makes a blood smear that is too short, he or she should try again and:
Decrease the angle of the spreader slide
Which statement concerning capillary blood gases is untrue?
Results are much more accurate than ABG's
An infant may require a blood transfusion if blood levels of this substance exceed 18 mg/dL
Which of the following is least likely to contaminate a PKU test?
Using isopropyl alcohol to clean the site
Correct newborn screening test collection of handling includeds:
Using one large drop to entirely fill a collection circle
It is inappropriate to apply a bandage to a capillary puncture site on an infant or child younger than 2 years of age because it can:
All of the above: Irritate the infant's tender skin, pull off & be a chocking hazard, tear delicate skin when removed
Which of the following action words associated with capillary puncture procedures steps are in the correct order?
Warm, clean, puncture, wipe, collect
Strong repetitive pressure, such as squeezing or milking a site during capillary specimen collection:
Can hemolyze and contaminate specimens
In an infant's heel, the area of the vascular bed that is rich in capillary loops is located:
Between .35 and .82 mm deep
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