Chapter 10 Review

What does the term "calcaneus" mean?
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What does the term "calcaneus" mean?
Heel bone
A blood smear from an EDTA specimen should be made
within 1 hour of collection
Why are capillary blood gases less desirable than arterial blood gases (ABGs)?
-Skin puncture blood contains tissue fluid.
-Skin puncture blood is only partly arterial.
-The blood is exposed to air during collection
What is the Clinical and Laboratory Standards Institute (CLSI) recommended maximum depth of heel puncture?
2.0 mm
Which of the following is a preferred capillary puncture site?
Middle finger
It is necessary to control depth of lancet insertion during capillary puncture to avoid
injuring the heel bone
A capillary puncture should be done rather than a venipuncture in all of the following situations EXCEPT when
a light-blue-top tube is needed
A laboratory report form should indicate when a specimen has been collected by capillary puncture because
some test results vary with specimen source
What is PKU?
A hereditary inability to metabolize phenylalanine
Which of the following scenarios represents correct capillary puncture technique?
Puncturing perpendicular to the fingerprint whorls
Capillary puncture is the preferred method of obtaining blood from infants because-capillary blood is preferred for some tests. -removing tubes of blood can lead to anemia -venipuncture in infants may damage veins.Capillary puncture blood reference ranges are higher for which of the following analytes?GlucoseIf the alcohol is still wet when a capillary puncture is made it can-cause hemolysis of the specimen. -lead to errors in the testing process. -prevent round drops from forming.Why are EDTA specimens obtained before other specimens when collected by skin puncture?To minimize effects of platelet clumpingWhich of the following is the safest area for infant heel puncture?The lateral plantar surfaceCapillary punctures that are deeper than recommended are more painful because pain fibers increase in abundance below2.4 mmCapillary puncture blood most closely resemblesarterial bloodWhy should a laboratory report form indicate the fact that a specimen has been collected by capillary puncture?Because test results can vary depending on the method of collectionWhich microtube would be used to collect a specimen for a CBC?Purple topWhat is the purpose of warming the site before skin puncture?it increases blood flow up to seven times