A nurse is assessing a client who received a Mantoux skin test 72 hr ago for tuberculosis screening. Which of the following findings indicates a positive test result?
A blister-like area
A cool, blanched area
An elevated, hardened area
An area of ecchymosis
The Correct Answer is C
Rationale:
A. A blister-like area: Blistering is not the expected reaction used to interpret a Mantoux test. The result is based on the presence and size of induration, not the formation of blisters.
B. A cool, blanched area: Coolness and blanching are not indicators of a positive test. These findings may reflect poor circulation or local skin reaction unrelated to tuberculosis screening.
C. An elevated, hardened area: Induration (elevated, firm area) at the injection site, measured in millimeters, is the basis for determining a positive result. The size threshold for positivity depends on the client’s risk factors for tuberculosis.
D. An area of ecchymosis: Bruising at the site is a local skin reaction that can occur after any injection and is unrelated to the diagnostic criteria for a positive Mantoux test.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","E"]
Explanation
Rationale for correct choices:
- Insert a large-bore IV catheter: A large-bore IV (18–20 gauge) is necessary to allow rapid administration of blood products and reduce hemolysis of red blood cells during transfusion. This ensures safe and effective delivery of the blood components.
- Witness the client signing a consent for transfusion: Informed consent is required before initiating a blood transfusion. The nurse ensures that the client understands the purpose, risks, and potential complications, and witnesses the signing to meet legal and ethical standards.
- Have a second nurse confirm the information on the blood lab: Verifying the blood type, crossmatch, and client identifiers with a second nurse reduces the risk of transfusion errors and ensures patient safety before starting the transfusion.
Rationale for incorrect choices:
- Explain to the client that transfusion reactions are not serious: Transfusion reactions can be serious, including hemolytic reactions, febrile reactions, or allergic responses. The nurse should educate the client on the potential risks and signs of a reaction rather than minimizing them.
- Flush the transfusion tubing with dextrose 5% in water: Blood products should only be administered with 0.9% sodium chloride (normal saline). Flushing with dextrose or other solutions can cause hemolysis and compromise the safety of the transfusion.
Correct Answer is ["A","B","C","E"]
Explanation
A. ABG results: pH 7.32 (acidosis), HCO₃⁻ 18 mEq/L (low), PaO₂ 68 mm Hg, SaO₂ 90%. Indicates metabolic acidosis with hypoxemia. This is a significant abnormality needing prompt attention.
B. Amylase results: Elevated amylase is a hallmark of acute pancreatitis and confirms the suspected diagnosis.
C. Temperature: Fever with pancreatitis can signal systemic inflammatory response or infection, requires provider notification.
D. Hematocrit level: 42%, within the normal range (female 38–47%, male 42–52%).
E. Pain report: Severe abdominal pain 8/10, persistent >24 hours. Pancreatitis pain requires provider management (often opioids, supportive care).
F. Glucose level: 108 mg/dL is within normal limits (70–110). It is not concerning at this time.
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