How do you administer a PPD test?
Administration
- Locate and clean injection site 5–10 cm (2–4 inches) below elbow joint. Place forearm palm-up on a firm, well-lit surface.
- Prepare syringe. Check expiry date on vial and ensure vial contains tuberculin PPD-S (5 TU/0.1 ml).
- Inject tuberculin (see Figure A3.1)
- Check injection site.
- Record information.
What is a PPD administration?
A doctor or nurse will swab the skin of your inner forearm with alcohol. You’ll then get a small shot that contains PPD under the top layer of your skin. You may feel a slight sting. A bump or small welt will form, which usually goes away in a few hours. After 48 to 72 hours, you must return to your doctor’s office.
How much PPD do you inject?
The TST is performed by injecting 0.1 ml of tuberculin purified protein derivative (PPD) into the inner surface of the forearm. The injection should be made with a tuberculin syringe, with the needle bevel facing upward.
Is PPD subcutaneous or intradermal?
Administering the Test It is worth emphasizing that the PPD should be injected intradermally, not subcutaneously. This should produce a discrete, pale elevation of the skin (wheal) from 6 to 10 mm in diameter.
How is a 2 Step TB test done?
For the 2 Step PPD Test, your doctor will ask you to return for the second round of testing anywhere from 7 to 10 days later. You’ll go through the same testing procedure as before. One appointment will be the injection itself and a second appointment 48-72 hours later will be for reviewing the results.
What happens if TB skin test is injected too deep?
For an intradermal injection, the needle bevel is advanced through the epidermis, the superficial layer of skin, approximately 3 mm so that the entire bevel is covered and lies just under the skin. The injection will produce inadequate results if the needle angle is too deep or too shallow.
What needle do you use for PPD?
The tuberculin is administered using a single-dose disposable tuberculin syringe that has a one- quarter to one-half inch, 27-gauge needle with a short bevel.
How long is PPD good in a syringe?
Once punctured, a vial may be used for up to 30 days, or until the expiration date on the vial, whichever is earliest. Write the date first used on the vial. The vial should always be kept refrigerated and protected from light (such as in a brown paper bag) when not in immediate use.
What happens if you inject too much PPD?
pain, redness, or irritation at site where injected.
Is PPD given intradermal?
Administering the TST. The Mantoux tuberculin skin test (TST) is performed by placing an intradermal injection of 0.1 ml of purified protein derivative (PPD) containing 5 tuberculin units (TU) into the volar surface of the forearm.
What route is TB skin test given?
The TST is an intradermal injection of 0.1 ml of tuberculin (PPD) on the inner surface of the forearm. The skin test reaction should be read between 48 and 72 hours after administration.
What is the time frame for a 2 step PPD?
What is the procedure for 2-step TB skin test? Both step 1 and step 2 of the 2 step TB skin test must be completed within 28 days.
What happens if a TB shot doesn’t bubble?
The test is “negative” if there is no bump (or only a very small bump) at the spot where the fluid was injected. A negative TB skin test usually means that you don’t have TB. In some situations, you may need to have another TB skin test later.
Why does a TB test bubble?
If an individual is infected with TB, their immune system will react to the tuberculin given in the TB skin test. The injection is usually done on the inside of the forearm. When it is done correctly, the injection will create a small, pale-colored bump on the skin called a wheal.
Why do you need two PPD tests?
A second PPD skin test is applied to those individual in whom the PPD skin test is negative. The second test is read. A positive test 2nd test indicates TB infection in the distant past. The individual is referred for a chest X-ray and evaluation by a physician.
What if a TB test does not bubble?