Which of the following pairs of blood tests is appropriate for a fasting specimen?
Glucose and triglycerides
BUN and alkaline phosphatase
Creatinine and total protein
Lactate dehydrogenase and albumin
The Correct Answer is A
Choice A reason:
Glucose and triglyceride levels are influenced by recent food intake, so it is essential to measure these levels after a period of fasting to obtain accurate results. Fasting ensures that the glucose measurement reflects the body's baseline glucose level without the influence of a recent meal, which is crucial for diagnosing and managing conditions like diabetes. Similarly, triglycerides, which are fats in the blood, can be elevated after eating, so a fasting sample gives a clear picture of the lipid profile for assessing cardiovascular risk.
Choice B reason:
While BUN (Blood Urea Nitrogen) levels can be affected by diet, fasting is not typically required for BUN or alkaline phosphatase tests. These tests are often part of a comprehensive metabolic panel that may or may not require fasting. However, fasting is not specifically necessary for accurate measurement of these two tests.
Choice C reason:
Creatinine and total protein levels are generally not affected by short-term dietary intake, so fasting is not required for these tests. Creatinine is a waste product from muscle metabolism and is used to evaluate kidney function, while total protein levels can indicate a variety of conditions including liver and kidney disorders, but they reflect the body's long-term nutritional status rather than immediate food intake.
Choice D reason:
Lactate dehydrogenase (LDH) and albumin tests do not require fasting. LDH is an enzyme found in almost all body tissues and is released into the bloodstream when tissues are damaged, so its levels are not dependent on food intake. Albumin is the most abundant protein in the blood and is produced by the liver; its levels are used to assess liver and kidney function, nutritional status, and other conditions, but fasting is not necessary for accurate measurement.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason:
A quiet and professional tone of voice is essential for a phlebotomy technician when introducing themselves to a patient. This tone conveys respect and maintains a calm environment, which is particularly important in healthcare settings where patients may be anxious or fearful about medical procedures. A professional demeanor helps to establish trust and reassures the patient that they are in capable hands.
Choice B Reason:
A loud and authoritative tone is not appropriate when introducing oneself to a patient. It can be intimidating and may increase the patient's anxiety. The goal is to make the patient feel comfortable and safe, not overpowered or coerced.
Choice C Reason:
Being assertive and humorous can sometimes help to lighten the mood and make the patient feel more at ease. However, humor must be used judiciously as it may not be well-received by all patients, especially in a medical setting where they might be experiencing stress or discomfort.
Choice D Reason:
A commanding and confident tone may convey confidence, but it can also come across as overbearing. While confidence is important, it should not overshadow the need for empathy and understanding of the patient's feelings and comfort.
Correct Answer is B
Explanation
Choice A reason:
Collecting the specimen in an SST (serum separator tube) is not suitable for ABG (arterial blood gas) analysis. SST tubes are used for chemistry tests that require serum separation after centrifugation and are not designed for the preservation of blood gases.
Choice B reason:
Placing the specimen in ice is the correct action when transporting a specimen for ABG analysis. Cooling the specimen slows down metabolic processes, which can alter the levels of gases and pH in the blood if not promptly analyzed. This is particularly important if there is a delay expected in the analysis of the ABG specimen.
Choice C reason:
Collecting the specimen in sodium citrate is not appropriate for ABG analysis. Sodium citrate is an anticoagulant used in coagulation studies and would interfere with the measurement of blood gases and pH levels in an ABG analysis.
Choice D reason:
Inserting the specimen in a light-resistant package is not a standard requirement for ABG specimens. While protecting specimens from light is important for certain types of tests, such as those for bilirubin, it is not necessary for ABG analysis.
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