What is the correct dose for a PPD test?

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Prepare for the West-MEC Medical Assisting Technical Skills Assessment. Study with flashcards and multiple choice questions, with comprehensive hints and explanations. Get exam ready!

Multiple Choice

What is the correct dose for a PPD test?

Explanation:
Tuberculin skin testing uses a very small intradermal dose to elicit a localized immune response. The standard amount is 0.1 mL of purified protein derivative (5 tuberculin units), injected just under the skin to form a tiny wheal. This precise dose is essential for a reliable reading 48–72 hours later; using more than this amount can spread within the skin and distort the result, while a smaller or incorrect dose wouldn’t produce a proper induration. So the correct dose is 0.1 mL.

Tuberculin skin testing uses a very small intradermal dose to elicit a localized immune response. The standard amount is 0.1 mL of purified protein derivative (5 tuberculin units), injected just under the skin to form a tiny wheal. This precise dose is essential for a reliable reading 48–72 hours later; using more than this amount can spread within the skin and distort the result, while a smaller or incorrect dose wouldn’t produce a proper induration. So the correct dose is 0.1 mL.

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