Phlebotomy Essentials 5th Edition Chapter 10
Arterial content has been increased
A blood smear is:
Blood spread out on a microscope slide
The calcaneus is a bone located in the:
This is the abbreviation for a pulmonary function test:
A cyanotic extremity would:
Be bluish in color
A differential test is unable to determine:
Packed cell volume
"Feather" is a term used to describe the appearance of:
The thinnest area of a blood film
Fluid in the spaces between the cells is called:
This is a sharp-pointed device used to make capillary punctures:
Which of the following statements most accurately describes capillary puncture blood?
A mix of venous, arterial, and capillary blood
Which statement concerning microhematocrit tubes is incorrect?
They are coated with lithium heparin
Referring to fig. 10-1, identify the letters of the fingers that are recommended as sites for capillary puncture:
C and D
Inflammation of the bone and cartilage
This is a term for the bottom surface of the heel:
Whorls as related to capillary puncture are:
Spiral patterns of fingerprints
The temperature of heel warming devices should never exceed:
42 degrees C
Which of the following is the medical term for a finger bone?
CBG specimens are collected in:
Narrow-bore capillary tubes
Capillary specimens contain:
All of the above: Arterial blood, tissue fluids, venous blood
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
Which capillary specimen should be collected separately?
A microcollection container is sometimes called a:
The composition of blood obtained by capillary puncture more closely resembles:
If venous blood is placed in a microtube, it is important to:
Label it as a venous specimen
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
This test is typically performed on capillary blood:
Reference values for this test are higher for capillary specimens:
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
According to CLSI, depth of heel puncture should not exceed:
Which of the following can be a complication of a heel puncture that is too deep?
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
The major blood vessels of the skin are located:
At the dermal-subcutaneous junction
A capillary puncture that parallels the whorls of the fingerprint will:
Allow blood to run down the finger
A list of capillary puncture equipment would exclude:
Blood culture bottles
Which color-coded microtube would be used to collect a CBC?
If the following tests are collected from a patient by capillary puncture, which test specimen is collected first?
CBC: Bilirubin, CBC, Lytes, Glucose
What is the purpose of warming the site before capillary puncture?
Increase the flow of blood
For accurate results, the heel must be warmed before capillary specimen for this test:
The recommended antiseptic for cleaning capillary puncture sites is:
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
Proper finger puncture technique would exclude:
Puncturing parallel to the fingerprint
Hemolysis of a capillary specimen can erroneously elevate results for this test:
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
A blood smear is required for this test:
An acceptable routine blood smear:
Has a feathered edge
A blood smear prepared from an EDTA specimen should be made:
Within 1 hour of specimen collection
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
It is unlikely that hold in a blood smear would be caused by:
Collection of a thick blood smear may be requested to detect:
Iron fillings used in capillary blood gas collection:
Help mix anticoagulant
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
Phenylketonuria is a:
Genetic disorder involving phenylalanine metabolism
Which of the following is a newborn screening test?
Falsely decreased bilirubin results can be caused by:
Failing to protect the specimen from light
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
Neonatal screening for this disorder is required by law in the United States:
Jaundice in a newborn is associated with high levels of:
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
The best way to mix blood in an additive microtube is to:
Invert it gently
Strong repetitive pressure, such as squeezing or milking a site during capillary specimen collection:
Can hemolyze and contaminate specimens
Which of the following collection devices fill by capillary action?
Which of the following equipment is reusable?
Lancets with permanently retractable blades are disposed of in the:
Capillary puncture is a poor choice for specimen collection if the patient is:
Which of the following steps should be omitted from infant heel puncture?
After making a blood smear:
Let it dry naturally
Which test must be collected by venipucture?
Neonatal screening is the testing of:
Newborns for certain disorders
Microhematocrit tubes with a red band on one end contain:
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
Which of the following capillary puncture techniques is incorrect?
Press the lancet down into the skin so it does not slip