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Allergic-like reactions and methemoglobinemia have been documented after the use of methylene blue dye in chromopertubation. [9] These reported symptoms vary from blue discoloration of body fluids to anaphylactic shock. [10] Methemoglobinemia is a blood disorder that can potentially result in various levels of cyanosis. [11]
The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present. The false positive rate is equal to the significance level. The specificity of the test is equal to 1 minus the false positive rate.
Clearblue was introduced in 1985 with the launch of the first Clearblue Home Pregnancy Test system, which at the time was owned by Unilever. [4] It was the world’s first “rapid home test” that gave pregnancy test results in 30 minutes and allowed a woman to take a test before going to the doctor. [4] The test was a three-step process ...
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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] Almost all pregnant women will have a positive urine pregnancy test one week ...
In the most basic sense, there are four possible outcomes for a COVID-19 test, whether it’s molecular PCR or rapid antigen: true positive, true negative, false positive, and false negative.
In 1985 they released and started to manufacture the first in their line of home pregnancy test kits marketed under the Clearblue brand. [1] The name is related to the fact that the test produced a blue marker line as a positive (pregnant) result and that it is 'clear' and simple to use.
The control line of this pregnancy test is blank, making the test invalid. Most tests will incorporate a second line which contains a further antibody (one which is not specific to the analyte) that binds some of the remaining colored particles which did not bind to the test line.
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