sweat test


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sweat test

a test for cystic fibrosis of the pancreas in which electrolytes are measured in collected sweat; sodium chloride concentration above 50 mEq/L (children) or 60 mEq/L (adults) is positive.

sweat test

n.
A laboratory test that measures the amount of chloride and sodium in a patient's sweat, performed to diagnose cystic fibrosis.

sweat test

a method for evaluating sodium and chloride excretion from the sweat glands, often the first test performed in the diagnosis of cystic fibrosis. The sweat glands are stimulated with a drug such as pilocarpine, and the perspiration produced is analyzed. The eccrine glands of patients with cystic fibrosis produce sodium and chloride concentrations that are three to six times normal. Chloride levels above 60 mEq/L and sodium levels above 90 mEq/L are considered diagnostic for the disease. The test is very reliable, and although it may be useful at any age, it is usually performed on infants from 2 weeks to 1 year of age. See also cystic fibrosis.

sweat test

Pediatrics A test used to diagnose cystic fibrosis–CF, which is characterized by defects in secretion–especially of sodium and chloride–by exocrine glands. See Cystic fibrosis. Cf Sweat testing.
References in periodicals archive ?
For the first 4 months (January-April 2012), the number of sweat tests performed for neonates and infants 3 months or younger and for infants older than 3 months were 42 and 227, respectively.
Guidelines for the Performance of the Sweat Test for the Investigation of Cystic Fibrosis in the UK.
Sweat test: A sweat test reveals the amount of salt a person loses when perspiring.
At present, CF is routinely diagnosed by newborn screening using a blood test and a sweat test, though these can lead to both false positive and false negative results.
The campaign kicked off this week with a TV ad featuring athletes taking on "the ultimate sweat test challenge".
Among their topics are screening newborns for cystic fibrosis, cystic fibrosis and respiratory viral infections, neutrophil elastase-mediated modulation of pathophysiology in cystic fibrosis lung disease, genotype heterogeneity of the molecular basis of cystic fibrosis as the paradigm of Lithuanian population genetic testing, serum transferrin microheterogeneity in cystic fibrosis, recommendation for good practice and analytical criteria of the methods used in the sweat test, ocular surface changes in patients with cystic fibrosis, and managing arthritis related to cystic fibrosis.
Based on positive quantitative sweat test [greater than or equal to] 60 mmol/L and the presence of 2 cystic fibrosis-causing mutations, we made the diagnosis of cystic fibrosis.
Clearly improved reliability has resulted from the adoption of Aridion, as demonstrated by an industry standard sweat test in which a hearing instrument placed on a prosthetic ear is exposed to continual drops of a sweat solution for several days.
This patient had one positive sweat test and other symptoms suggestive of CF, including respiratory failure.
Once the symptoms indicate CF it is confirmed through a sweat test.