How to Read a Tuberculosis Skin Test: 9 Steps (with Pictures) - wikiHow
Sep 6, 2024 · Use your fingertips to find the induration. This is a hard, dense, raised formation with definite borders. If there is a firm bump, use a pen to mark the widest edges of the induration on the forearm. The only part that is important for your test results is the hard bump.
Clinical Testing Guidance for Tuberculosis: Tuberculin Skin Test
May 14, 2024 · In this test, a standardized solution made with purified protein derivative (PPD), which is derived from tuberculin, is injected under the skin. Typically, PPD produces a T-cell mediated delayed-type hypersensitivity reaction if the person has been infected with TB bacteria.
TB test results and how to interpret - American Nurse Journal
Aug 8, 2022 · To ensure accuracy, perform interpretations in adequate lighting and mark the areas of induration. Then measure its longest diameter horizontally. Don’t measure any redness, which may indicate an allergic or PPD vaccine reaction and doesn’t have interpretive value.
To determine if a skin test should be administered, conduct a risk assessment for each patient that takes into consideration recent exposure to TB disease, clinical conditions that increase the risk for TB disease if infected, and the program’s capacity to deliver treatment for latent TB infection. • Wheal should be 6 to 10 mm in diameter.
Mantoux Tuberculin Skin Testing Ruler | Tuberculosis (TB) | CDC
This straight-edge ruler is used to measure the induration of a person’s reaction to the tuberculin skin test. The white ruler provides tips on how to read the test and a space to write the local contact information.
Tuberculosis PPD Skin Test: Ranges, Results, Readings - MedicineNet
A physician will measure the diameter of the induration transversely (for example, perpendicular) to the long axis of the forearm and recorded in millimeters. The area of induration (palpable, raised, hardened area) around the site of injection is the reaction to tuberculin.
Measure • Measure only the area of induration, a hard, dense, raised formation • Do not measure erythema, reddening of the skin that can also have swelling • Use the millimeter ruler to measure the diameter of the induration perpendicular to the long axis of the forearm
• Note the induration (hard, raised formation) 2. Palpate • Use your fingertips to determine if any induration is present. 3. Mark • Mark the edges of induration across the forearm with a pen held at a 45o angle. 4. Measure • Using a ruler, measure the distance between pen marks • Measure induration NOT erythema (redness) 5. Record ...
Guidance for National Tuberculosis Programmes on the …
This annex describes how to administer, read and interpret a TST using 5 tuberculin units (TU) of tuberculin PPD-S. An alternative to 5 TU of tuberculin PPD-S is 2 TU of tuberculin PPD RT 23.
Patient’s arm should be resting on a flat surface, slightly flexed at elbow. D. If induration is present, move the tip of a ballpoint pen at a 45° angle laterally toward the edges of the induration. Stop when you feel the edge of the induration and the …