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An electroretinogram (ERG) test performed in 2014. A historical photo of a patient undergoing an electroretinogram. Clinically used mainly by ophthalmologists the electroretinogram (ERG) is used for the diagnosis of various retinal diseases. [2] Inherited retinal degenerations in which the ERG can be useful include: [citation needed]
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
ERG (ETS-related gene) is an oncogene. [5] [6] [7] ERG is a member of the ETS (erythroblast transformation-specific) family of transcription factors. [8]The ERG gene encodes for a protein, also called ERG, that functions as a transcriptional regulator.
If the likelihood ratio for a test in a population is not clearly better than one, the test will not provide good evidence: the post-test probability will not be meaningfully different from the pretest probability. Knowing or estimating the likelihood ratio for a test in a population allows a clinician to better interpret the result. [7]
It is a subjective test, relying on the patients responses. Miscommunication between the clinician and patient may result in inaccuracies. The results can be misinterpreted if the clinician does not take note of the orientation of the striations. Extensive suppression may interfere with perception of the second stripe. [1]
The fecal egg count reduction test was suggested in the World Association for the Advancement of Veterinary Parasitology guideline for estimating the reduction in fecal egg counts and its corresponding confidence interval. [1] The results of this test can be used to determine the anthelmintic resistance status of the animals.
The anion gap is a calculated measure. It is computed with a formula that uses the results of several individual lab tests, each of which measures the concentration of a specific anion or cation. The concentrations are expressed in units of milliequivalents/liter (mEq/L) or in millimoles/litre (mmol/L).
Polysomnography (PSG) is a multi-parameter type of sleep study [1] and a diagnostic tool in sleep medicine.The test result is called a polysomnogram, also abbreviated PSG.The name is derived from Greek and Latin roots: the Greek πολύς (polus for "many, much", indicating many channels), the Latin somnus ("sleep"), and the Greek γράφειν (graphein, "to write").