Shared Flashcard Set

Details

TB
From Slides
12
Nursing
Undergraduate 1
04/23/2012

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Cards

Term
What is the intradermal bleb size?
Definition
5-10 mm
Term
How long does it take from exposure to PPD+ conversion?
Definition
8-12 weeks.
Term
What is the rational for a two step test?
Definition
REALLY old TB infection may not respond to the first TST however, a second test will usually elicit an appropriate positive response.
Term
What is BCG? What type of false reading does it cause?
Definition
Neonatal vaccine, causes a false positive because of the vaccine.
Term
How long until you can read the test?
Definition
48-72 hours
Term
What type of reaction does the PPD TST cause?
Definition
A delayed T4 hypersensitivity reaction
Term
What can cause a false positive reading?
Definition
1. Non-tuberculine mycobac
2. BCG Vaccine
Term
What can cause a false NEGATIVE reading?
Definition
1. Anergy
2. Recent Tb infection
3. OVERWHELMING Tb infection
4. < 6mos old
5. Live Virus vaccine
Term
How is the induration read?
Definition
- Should have a hard edge and be read perpendicularly to the forarm long axis
Term
What are the s/sx of Tb in order of appearance?
Definition
1. Night sweats
2. Cough
3. Hemoptosis
4. Weight Loss
Term
What is ordered if the person has positive s/sx?
Definition
1. PPD
2. Chest XRay
3. Sputum Smear
4. HIV test
Term
What if the PPD is POSITIVE and the chest xray is negative?
Definition
Intent track, INH treatment recommended.
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