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:
Quality control measurements are essential for ensuring the accuracy and reliability of blood glucose monitors. According to best practices, all blood glucose monitors in use, regardless of their origin, should undergo daily quality control checks. This is to verify that the monitors are functioning correctly and providing accurate readings, which is crucial for patient care and treatment decisions.
Choice B reason:
Focusing only on the blood glucose monitors from the new office for daily quality control measurements is not sufficient. While new equipment may be less likely to have wear-and-tear issues that could affect performance, it is still subject to potential inaccuracies and must be included in the daily quality control routine.
Choice C reason:
Similarly, excluding the new monitors and only checking those from the old medical office would neglect the possibility of inaccuracies in the newer equipment. All monitors, irrespective of their age, can experience calibration drift or other issues that affect their performance.
Choice D reason:
Opting not to perform daily quality control measurements on any of the blood glucose monitors would be against the recommended guidelines and could lead to inaccurate blood glucose readings. This could have serious implications for patient health, particularly in the management of diabetes.
Correct Answer is A
Explanation
Choice A reason:
The left antecubital area is the correct site to perform venipuncture on a patient who has had a right-sided mastectomy. It is recommended to avoid the side of the mastectomy due to the risk of lymphedema and other complications associated with the removal of lymph nodes during the surgery. The left antecubital fossa, which is the area in front of the elbow, is a common site for venipuncture and is generally safe for use when the right side cannot be used.
Choice B reason:
The right cephalic vein should be avoided in a patient with a right-sided mastectomy. Venipuncture on the same side as the mastectomy can increase the risk of complications, including lymphedema, which is a condition characterized by swelling due to lymph fluid accumulation. Therefore, the right cephalic vein is not an appropriate choice.
Choice C reason:
The left femoral artery is not a venipuncture site; it is an arterial site. Venipuncture refers to accessing a vein, not an artery, for blood collection. Additionally, arterial puncture is a more invasive procedure typically reserved for arterial blood gas analysis and is not performed for routine venipuncture.
Choice D reason:
Similar to choice B, the right basilic vein should be avoided for venipuncture in a patient who has had a right-sided mastectomy. The basilic vein is located on the inner side of the arm and using it could pose the same risks as using the right cephalic vein, including the potential for lymphedema.
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