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The results of this test must be interpreted carefully. The person's medical risk factors determine at which increment (5 mm, 10 mm, or 15 mm) of induration the result is considered positive. [12] A positive result indicates TB exposure. 5 mm or more is positive in An HIV-positive person; Persons with recent contacts with a TB patient
PPD: packs per day postpartum depression, that is, postnatal depression purified protein derivative or Mantoux test, for tuberculosis testing PPE: personal protective equipment: PPF: posterior pharyngeal flap PPH: postpartum haemorrhage primary pulmonary hypertension procedure for prolapse and hemorrhoids: PPI: proton pump inhibitor: PPMS
His observations led to the development of the tuberculin skin test. Individuals with active tuberculosis were usually tuberculin positive, but many of those with disseminated and rapidly progressive disease were negative. This led to the widespread but erroneous belief that tuberculin reactivity is an indicator of immunity to tuberculosis.
[7] [8] If a minor reaction is considered doubtful, the OT test is less accurate and may fail to detect TB, producing a false negative. [2] If all doubtful indications are instead classified as positive, there is no significant difference between the OT test, the PPD tine test, or the Mantoux test. [3]
The equivalent Mantoux test positive levels done with 10 TU (0.1 mL 100 TU/mL, 1:1000) are 0–4 mm induration (Heaf 0-1) 5–14 mm induration (Heaf 2) >15 mm induration (Heaf 3-4) The Mantoux test is preferred in the United States for the diagnosis of tuberculosis; multiple puncture tests, such as the Heaf test and Tine test, are not recommended.
A pregnancy test is used to determine whether a female is pregnant or not. The two primary methods are testing for the female pregnancy hormone (human chorionic gonadotropin (hCG)) in blood or urine using a pregnancy test kit, and scanning with ultrasonography. [1] Testing blood for hCG results in the earliest detection of pregnancy. [2]
The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.
Postpartum depression (PPD), also called perinatal depression, is a mood disorder which may be experienced by pregnant or postpartum individuals. [3] Symptoms include extreme sadness, low energy, anxiety, crying episodes, irritability, and changes in sleeping or eating patterns. [1]
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