Practice Question
A nurse is caring for a patient who is to be screened for tuberculosis. Which angle should the nurse use to inject the tuberculin-purified protein derivative?
Answer Choices:
Correct Answer:
15 degree angle
Rationale:
🟢The Mantoux test for tuberculosis screening requires a 0.1 mL intradermal injection of purified protein derivative (PPD).
🟢Injecting at a 15° angle allows the solution to enter just beneath the epidermis, forming a small wheal or bleb.
🟢The forearm is the most common site, and the injection should be performed with a tuberculin syringe and 26–27-gauge needle.
🟢Injecting too deeply invalidates the test, as the antigen must remain intradermal for accurate reading.
🟢This technique ensures proper antigen placement for reliable test interpretation at 48–72 hours.
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This question is from Custom NUR 112 FA25 Exam#6 which contains 55 questions.
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Question Details
- Category: RN Nursing Exam(s)
- Subcategory: ATI Exam(s)
- Domain: RN Custom Exam(s)
- Answer Choices: 4