A nurse in an allergy clinic is caring for a client who has a history of seasonal allergy symptoms. The client had a radioallergosorbent test (RAST) completed on a previous visit. The nurse should recognize that an elevation in which of the following immunoglobulins indicates a positive result?
Immunoglobulin E (IgE)
Immunoglobulin M (IgM)
Immunoglobulin A (IgA)
Immunoglobulin G (IgG)
The Correct Answer is A
Choice A reason: Immunoglobulin E (IgE) is associated with allergic reactions. A RAST test measures the level of allergen specific IgE antibodies in the blood. An elevation in IgE indicates sensitization to a particular allergen and a positive result for the allergy.
Choice B reason: Immunoglobulin M (IgM) is usually the first antibody produced by the immune system when it detects an infection. It is not typically associated with the detection of allergies.
Choice C reason: Immunoglobulin A (IgA) plays a critical role in mucosal immunity and is found in high concentrations in the mucous membranes, particularly those lining the respiratory passages and the gastrointestinal tract, but it is not used as an indicator in RAST testing for allergies.
Choice D reason: Immunoglobulin G (IgG) is the most abundant type of antibody and is involved in the recognition and removal of pathogens. It is not specific to allergic response detection in RAST testing.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: The normal range for serum creatinine is indeed 0.6 to 1.2 mg/dL for males and 0.5 to 1.1 mg/dL for females. Serum creatinine is a waste product from the normal breakdown of muscle tissue. As kidneys become impaired for any reason, the serum creatinine level rises due to poor clearance by the kidneys.
Choice B reason: A GFR below 60 mL/min/1.73 m for three months or more is one of the criteria for the diagnosis of chronic kidney disease. GFR is a measure of how well the kidneys filter blood, and a lower GFR indicates poorer kidney function.
Choice C reason: Blood urea nitrogen (BUN) levels should indeed be between 7 and 20 mg/dL. BUN measures the amount of nitrogen in your blood that comes from the waste product urea. Urea is made when protein is broken down in your body. BUN levels can rise with the level of protein in your diet and your kidney function[^10^].
Choice D reason: An increase in serum potassium can indicate hyperkalemia, which may be a sign of acute kidney injury. Potassium is a critical electrolyte, and its levels are tightly regulated by the kidneys. High levels can lead to dangerous heart rhythms.
Correct Answer is C
Explanation
Choice A reason: The blood should not be infusing for 5 hours as transfusions of packed RBCs should be completed within 2 to 4 hours to minimize the risk of bacterial growth and transfusion reactions.
Choice B reason: Medications should not be administered through the same IV line as blood products due to the risk of reactions and interactions.
Choice C reason: The packed RBCs are indeed connected by Tubing to normal saline, which is used to keep the line open and prevent clotting.
Choice D reason: The drip chamber should not be filled completely with blood as it is necessary to monitor the drip rate and to ensure that air does not enter the line.
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