Sweat test. Purpose. measures concentration of chloride. The sweat test measures the concentration of chloride that is excreted in sweat. It is used to screen for cystic fibrosis (CF). Due to defective chloride channels ( CFTR ), the concentration of chloride in sweat is elevated in individuals with CF Two methods of sweat analysis are frequently used: Sweat chloride concentration is recommended as the diagnostic test for CF. Sweat conductivity testing may be used to screen for CF To understand what the sweat test results mean, a chloride level of: Less than or equal to 29 mmol/L = CF is unlikely regardless of age Between 30 - 59 mmol/L = CF is possible and additional testing is needed Greater than or equal to 60 mmol/L = CF is likely to be diagnose A chloride sweat test helps diagnose cystic fibrosis (CF), an inherited disorder that makes kids sick by disrupting the normal function of epithelial cells. These cells make up the sweat glands in the skin and also line passageways inside the lungs, liver, pancreas, and digestive and reproductive systems. Kids who have CF are at risk for repeated lung infections , Cl and sodium, Na
Cystic fibrosis (CF) is the most common life-threatening autosomal-recessive disease affecting Caucasians in the western world. The sweat test is the main diagnostic test for CF. It is indicated as part of the clinical assessment for infants that have picked up on the national neonatal screening programme Sweat chloride concentration provides an in vivo assessment of CFTR function, but it is unknown the degree to which CFTR mutations account for sweat chloride variation. Objectives: To estimate potential sources of variation for sweat chloride measurements, including demographic factors, testing variability, recording biases, and CFTR genotype itself. Methods: A total of 2,639 sweat chloride. The sweat test measures the levels of chloride in the sweat of those collected during the test. 1. How long will I have to wait for results? You will get results rather quickly. In our experience, we received a phone call with results about an hour after the test was performed. Usually, you should receive your results within a day or two, depending on the office The sweat chloride test (ST) is the gold standard for cystic fibrosis (CF) diagnosis in symptomatic patients, within the newborn screening and in the follow-up of CF patients during molecular therapies. However, false positives have been reported in patients with different diseases
Sweat tests measure the amount of chloride in sweat. High chloride levels may indicate cystic fibrosis, an inherited disease that can have serious effects on the lungs and digestive system. Early detection can greatly assist in the management of the disease. Your doctor may have requested a sweat test because of a positive neonatal screening test. Sweat chloride testing should be performed by experienced technologists following international guidelines. The preferred site for testing is the volar surface of the forearm. The sweat test involves iontopheresis of pilocarpine, a cholinergic drug, into the skin to induce sweating in a localized area. Sweat is collected into a Macroduct coil. Sweat (Chloride) Test A test to measure the amount of chloride in the sweat. The test is performed by placing a solution on the forearm (or the thigh if the child is too small) and attaching electrodes. The skin is stimulated to sweat with a mild electric current, which does not cause pain or harm your child A sweat chloride test, also known as sweat test, is often used to diagnose cystic fibrosis (CF). People who will have this test should not take in iodide or bromide, because they may interfere with the sweat chloride test. Speaking of the test interpretations, they are as follows
ChloroChek® Cloridometer® Sweat Chloride Analyzer. The ChloroChek is the only FDA cleared Chloridometer for sweat testing. It is also the perfect companion to the Macroduct Advanced. With its intuitive touch-screen interface, it leads the operator through the entire process, measuring chloride levels in sweat samples in less than 20 seconds The sweat chloride test is performed when a patient (usually an infant) has symptoms of CF, has a close relative who has been diagnosed with CF or has had a positive or equivocal (uncertain) result from a blood spot in the Newborn Screening programme. CF symptoms include noticeably salty sweat, frequent respiratory infections and chronic cough, persistent diarrhoea, foul-smelling bulky greasy.
Ten patients had a sweat chloride test indicating CF but no mutations, and ten others had a positive chloride test and only one mutation. Together, those 20 patients with CF diagnoses could have been missed if a sweat chloride test had not been performed. The authors also identified patients who had the mutational analysis but would not have needed it for diagnosis if sweat chloride testing. The chloride sweat test measures the amount of sodium and chloride in sweat. Sodium and chloride are part of the body's electrolyte balance and combine to form the salt found in sweat. They help regulate tissue fluid balance. Normally, chloride travels in and out of the body's cells, helping to maintain electrical neutrality and water balance. This movement occurs through a protein, the cystic. Sweat chloride test. The sweat chloride test is the first line test for diagnosing cystic fibrosis. The results may be abnormal (diagnosis of CF), normal (CF very unlikely) or intermediate (possible CF, needing further testing). In young babies the intermediate range is very broad, because the sweat glands are still developing Sweat Chloride Test - GI for Kids. Your doctor may order this test for you in order to learn if your child may have Cystic Fibrosis. This is an inherited chronic disease that affects the lungs and digestive system. This test measures the amount of salt in your child's sweat. A high concentration of salt may indicate Cystic Fibrosis
Sweat Chloride Test or a Sweat Test is done for the diagnosis of Cystic Fibrosis in children. In sweat chloride test the sweat of the baby is collected first and then the concentration of chloride is analyzed in the sweat sample. The details of sweat chloride test is described here. When is a Sweat Chloride [ Sweat test What is a sweat test? Sweat tests measure the amount of chloride in sweat. High chloride levels may indicate cystic fibrosis, an inherited disease that can have serious effects on the lungs and digestive system. Early detection can greatly assist in the management of the disease. Your doctor may have requested a sweat test because of a positive neonatal screening test for cystic. Sweat chloride test is a test that will help your child's doctor know the chloride (salt) level in your child's sweat. It is most often done to evaluate if a child has cystic fibrosis. Before the test: You should report to the outpatient lab 15 minutes before your child's scheduled appointment time to register. After registering, report to the 2nd floor laboratory. How the test is done and. Test Name: SWEAT CHLORIDE General Information Lab Order Codes: SWCL Synonyms: Iontophoresis CPT Codes: 89230 x2 -Sweat collection by iontophoresis 82438 x2 - Chloride; other source Test Includes: Chloride concentration in sweat reported in mEq/L from duplicate collection sites. Logistics Test Indications: The analysis of sweat for increased electrolyte concentration is used to confirm the. Lear about the sweat chloride test used to diagnose cystic fibrosis, a genetic disease common in Caucasians
The sweat chloride test (ST) is the gold standard for cystic fibrosis (CF) diagnosis in symptomatic patients, within the newborn screening and in the follow-up of CF patients during molecular therapies. However, false positives have been reported in patients with different diseases. We describe and discuss 4 cases due to different clinical conditions in which we recorded false positive ST, and. A sweat test measures the amount of chloride, a part of salt, in Sweat. It is used to diagnose cystic fibrosis (CF). People with CF have a high level of chloride in their sweat. CF is a disease that causes mucus build-up in the lungs and other organs. It damages the lungs and makes it hard to breathe A negative result on the sweat chloride test indicates that cystic fibrosis is extremely unlikely. Babies less than six months of age who obtain sweat chloride values between 30 - 59 mmol/L have an indeterminate result. Patients older than six months of age who have a sweat chloride value of 40-59 mmol/L also have an indeterminate result. An indeterminate result on the sweat chloride test. The sweat test looks for excessive amounts of sodium chloride left on the skin following sweating. In a sweat test, a chemical called pilocarpine is placed on the skin. This causes the skin to sweat. An electrode is placed on the skin at two points. A very small electrical current is passed between the electrodes. This helps to draw the pilocarpine into the skin and produce sweating. After a. 50 L sweat in a sealed, labeled micro-cup. To schedule the collection for this test contact Peds Pulmonary at Doernbecher (503-418-5866). Reference Range: For infants up to and including 6 months of age, a chloride of: 30-59 mmol/L: Intermediate, possible Cystic Fibrosis. >=60 mmol/L: Consistent with Cystic Fibrosis. Patients should have a repeat sweat chloride analysis performed. For people.
The sweat test measures the amount of chloride in sweat. Patients with cystic fibrosis have a high level of chloride in their sweat. Guidelines The sweat test is an important diagnostic tool in cystic fibrosis and may be covered when used for that purpose. Usage of the sweat test as a predictor of efficacy of sympathectomy in peripheral vascular disease is unproven and, therefore, is not. The sweat test determines the amount of chloride in the sweat. There are no needles involved in the procedure. In the first part of the test, a colorless, odorless chemical, known to cause sweating, is applied to a small area on an arm or leg. An electrode is then attached to the arm or leg, which allows the technician to apply a weak electrical current to the area to stimulate sweating. A sweat chloride test result less than or equal to 39 mEq/L in [...] an infant over 6 months old probably means cystic fibrosis is not present. mercydesmoines.org. mercydesmoines.org. El resultado de una prueba de cloruro en sudor menor o igual a [...] 39 mEq/L en un bebé de más de 6 meses probablemente signifique [...] que no hay presencia de fibrosis quística. mercydesmoines.org. A sweat chloride test result of less than 30 mmol/L in all populations means cystic fibrosis is less likely. A result between 30 to 59 mmol/L does not give a clear diagnosis. Further testing is needed. If the result is 60 mmol/L or greater, cystic fibrosis is present. Note: mmol/L = millimole per liter . Normal value ranges may vary slightly among different laboratories. Talk to your health. Chloride, Sweat Synonym/acronym: Sweat test, pilocarpine iontophoresis sweat test, sweat chloride. Common use To assist in diagnosing cystic fibrosis. Specimen Sweat (0.1 mL minimum) collected by pilocarpine iontophoresis. Normal findings (Method: Ion-specific electrode or titration) Conventional & SI Units Normal 0-40 mEq/L or mmol/L Borderline 41.
Sweat soaks up through the center and into thin canals that zigzag out to the sticker's edge. To run the test, a clinician uses a weak electric current to drive a sweat-gland-activating gel. Sweat Chloride Test Helps Diagnose Cystic Fibrosis. Also known as: Sweat electrolytes, sweat test, iontophoretic sweat test. Your doctor may order a sweat chloride test if your child displays symptoms of cystic fibrosis, such as frequent respiratory infections and coughing, chronic diarrhea and malnutrition. The test also may be ordered as a follow-up test to confirm a diagnosis of cystic.
• A sweat chloride of <30 mmol/L in patients <6 months of age makes CF unlikely but requires genetic and clinical correlation. • A chloride concentration of 30-60 mmol/L if less than 6 months of age is an intermediate result which requires further cystic fibrosis assessment such as a repeat test and or further investigations Sweat Chloride. Test. HOW WILL THE TEST FEEL? Although the test is not painful, some people . describe a tingling sensation at the site of the electrode. In smaller children or infants, the sensation may cause irritability or discomfort. SWEAT TESTING POSES A REMOTE RISK OF . MINOR SKIN BURNS (1:50,000) There is an element of risk in all medical . procedures, no matter how simple. The sweat.
Sweat Test for Cystic Fibrosis (CF) Cystic fibrosis is a genetic (inherited) disease that causes thick, sticky mucus to build up in organs. The most conclusive testing for cystic fibrosis is the sweat test, which measures the amount of chloride in the body's sweat. This article discussed details of the sweat test The sweat test is a simple, painless diagnostic test used to measure the salt content of sweat to determine whether someone has cystic fibrosis.It's considered by clinicians to be the gold standard in diagnosing this disease. About cystic fibrosis. Cystic fibrosis is an inherited disease in which mutations in the CFTR gene cause the CFTR protein to be made incorrectly or not at all For Outpatients, test should only be drawn in outpatient locations within the Hospital at the Akron campus. Lab/Phone: 330-543-8417. TAT: Next business day. Additional Info: The Cystic Fibrosis Foundation Reference intervals for chloride: < or = 29 mEq/L, CF unlikely Sweat Test, picture. Move carousel Left. Move carousel right. A sweat test, also called a sweat chloride test, measures the amount of chloride in sweat. It is done to help diagnose cystic fibrosis. Normally, sweat on the skin surface contains very little chloride. People with cystic fibrosis have a high level of chloride in their sweat
A sweat chloride test is the gold standard test for diagnosing cystic fibrosis (CF). CF is a disease that causes mucus to build up in various organs, especially the lungs. This causes breathing problems. CF can be life-threatening if not treated. CF is an inherited disease that affects about 30,000 children and adults in the U.S. This simple test measures the amount of chloride, which is part. Sweat test; Sweat chloride; Iontophoretic sweat test; CF - sweat test; Cystic fibrosis - sweat test. How the Test is Performed. A colorless, odorless chemical that causes sweating is applied to a small area on an arm or leg. An electrode is then attached to the spot. A weak electrical current is sent to the area to stimulate sweating. People may feel a tingling in the area, or a feeling of.
Chloride - Serum chloride is the major extracellular anion and counter-balances the major cation, sodium, maintaining electrical neutrality of the body fluids. Two thirds of the total anion concentration in extracellular fluids is chloride and it is significantly involved in maintaining proper hydration and osmotic pressure. Movement of chloride ions across the red blood cell membrane is. Generally, chloride (sweat chloride) is measured. A sweat test is done on any person suspected of having cystic fibrosis. An initial test may be done as early as 48 hours of age. But a sweat test done during the first month of life may need to be repeated. Younger babies may not produce enough sweat to give reliable test results. Also, younger babies may naturally have lower sweat chloride. Sweat Chloride Testing The sweat chloride test is a non-invasive, needleless test that can aid in the diagnosis of Cystic Fibrosis. What to Expect During the Test There are no needles involved in the procedure. The sweat chloride test takes about one hour from start to finish. The test determines the amount of chloride in the patient's sweat. It is usually performed on the forearm but can be. Sweat chloride testing remains the diagnostic standard for CF. Sweat chloride testing should be the initial test performed in any patient with clinical suspicion of CF. Genetic testing can help clarify an indeterminate diagnosis, provide prognostic information, and guide disease- and CFTR mutation- specific therapy
iontophoresis test for the determination of sweat chloride, including techniques to minimize the potential for false-positive and false-negative test results. Screening methods based on sweat conductivity are also mentioned. Other methods for measuring sweat electrolytes after pilocarpine iontophoresis exist but are not included in the guideline. Some of these methods are documented as having. The chloride sweat test can diagnose cystic fibrosis and can be carried out to check the family history of cystic fibrosis or test people who are showing symptoms of cystic fibrosis. Preparation. There isn't anything special or out of the ordinary that you have to do for this test. You can drink, eat and exercise as usual. Medicines (if being taken) should be taken at the usual time. Sweat chloride values >60 mEq/L are diagnostic of CF whereas values <40 mEq/L are considered negative (<30 in infants up to 6 months of age). Values between 40 and 60 mEq/L (30-60 mEq/L in infants) are considered intermediate and require repeat testing Sweat chloride is a biomarker for cystic fibrosis (CF) 1.Sweat tests involve sweat induction, usually by pilocarpine iontophoresis, and measurement of the sample using an analytical instrument Sweat test, pilocarpine iontophoresis sweat test, sweat chloride. Rationale To assist in diagnosing cystic fibrosis (CF). Patient Preparation There are no food, fluid, activity, or medication restrictions unless by medical direction. Normal Findings Method: Ion-specific electrode or titration. Conventional and SI Units Interpretation; Birth-6 mo: 0-29 mEq/L or mmol/L: Normal: 30-59 mEq/L.
All elevated sweat conductivity results should be followed up with a sweat chloride test. It is critical to interpret results against the ranges specific to the sweat test performed. Sweat testing is often subject to error, particularly in younger patients. It is recommended that sweat testing be undertaken at centres which conduct a high volume of sweat tests on a weekly basis. Biochemical. So, a sweat test measures the level of chloride and sodium present in the sweat excreted from the patient's body. Usually our sweat contains very little sodium and chloride, whereas those who have cystic fibrosis have anywhere between two to five times the normal amount of sodium and chloride in their sweat. Reasons Why It is Conducted . As mentioned earlier, sweat tests are conducted on any.
Rationale: The diagnosis of cystic fibrosis (CF) is based on a characteristic clinical picture in association with a sweat chloride (Cl −) concentration greater than 60 mmol/L or the identification of two CF-causing mutations.A challenging problem is the significant number of children for whom no definitive diagnosis is possible because they present with symptoms suggestive of CF, a sweat. Sweat Chloride Test Collection Guidelines - Page 2 of 2 How the test is done, continued 5. A disk containing a clear spiral tube to collect sweat is put exactly where one of the electrodes was, and held in place by the Velcro® strap. Plastic wrap or tape may be used to help hold the disk in place. 6. Steps 1-5 will be done again on the other arm or leg. 7. After the second collector disk is. A Sweat Test (or Sweat Electrolyte Measurement) determines the concentration of sodium and chloride (salt) in your sweat. It is used to rule out Cystic Fibrosis (CF), a genetic (inherited) disease. ABOUT THE TEST The sweat test is performed by placing a device on one arm to stimulate the sweat glands. A very small electrical current is passed through the device for 6 minutes. This creates a.
This method is known as the classic sweat test (CST), and still is considered the golden standard for CF diagnosis [3, 4]. In the sweat gland ducts, chloride ions (Cl-) are reabsorbed by the CFTR (cystic fibrosis transmembrane regulator) . Then, in health subjects, the normal concentration of sweat chloride levels are minor than 30 mmol/L [6, 7] BEAKER TEST NAME: SWEAT CHLORIDE ANALYSIS BEAKER TEST REPORT NAME: Sweat Chloride Analysis. Beaker Synonyms. No synonym on file. Clinical Information. Sweat chloride concentrations in normal and cystic fibrosis patients vary somewhat with age and between different reported series. The ranges listed above are consensus of values most often reported in published studies. Specimen Requirements. The sweat test is the gold standard for the diagnosis of cystic fibrosis (CF) when combined with clinical symptoms. Topiramate can cause falsely elevated sweat chloride values and may result in the misdiagnosis of CF. Review of causes of false-positive sweat test is a vital step before a discussion of diagnosis of CF is undertaken which can. Dr. Amrita Dosanjh answered. 36 years experience Pediatrics and Pediatric Pulmonology. Repeat if suspected: The sweat chloride test is reliable in ruling out CF, but if there are symptoms, I would suggest a repeat sweat chloride test and genetic testing. Send thanks to the doctor A Sweat test measures chloride level in sweat and is the standard method for diagnosing cystic fibrosis. Alternative Names. Sweat test; sweat electrolytes; Iontophoretic sweat test. Why the Test is Performed. People with cystic fibrosis have higher amounts of sodium and chloride in their sweat, which the test can detect. Some people are referred for testing because of symptoms such as poor.
Chloride concentrations from the sticker showed excellent agreement with the current clinical standard for sweat collection, known as the Macroduct Sweat Collection System (MSCS). Furthermore, the sticker collected 33% more sweat than the MSCS on average. MSCS collected too little sweat for a reliable chloride measurement from 3 out of 51 participants. In contrast, the sticker collected enough. Background To assess the quality of sweat test (ST) based on the proportion of sweat sodium and sweat chloride as diagnostic parameter of cystic fibrosis (CF). Methods A retrospective study of 5,721 sweat samples and subsequent descriptive analysis were carried out. The test was considered of good quality (correct) when: (i) sweat chloride was lower than 60 mEq/L, and sweat sodium was. In case the sweat chloride levels are high then the test needs to be repeated. Two sweat results are taken as positive. Age : Sweat Chloride Levels: Interpretation: Likelihood of Cystic Fibrosis: For infants up to 6 months of age: Equal to or less than 29 mmol/L: Negative: CF is very unlikely: Between 30 - 59 mmol/L : Intermediate: CF is possible: Greater than or equal to 60 mmol/L: Positive.
A chloride sweat test is the gold standard test for diagnosing cystic fibrosis, a disease that causes mucus to build up in the lungs and other organs of chloride (as salt) in sweat compared with those who do not have cystic fibrosis. If there is a family history or a possibility of CF, the sweat test is part of the special tests that help make, or exclude, a diagnosis of cystic fibrosis. Screening for cystic fibrosis has been part of the national newborn blood spot screening programme since 2007. The sweat test is done in those babies. A chloride sweat test helps diagnose cystic fibrosis (CF), an inherited disorder that makes kids sick by disrupting the normal function of epithelial cells. These cells make up the sweat glands in the skin and also line passageways inside the lungs, liver, pancreas, and digestive and reproductive systems. Kids who have CF are at risk for repeated lung infections. The sweat test measures the. Thermoregulatory sweat test. Moisture-sensitive powder indicates the presence of excessive sweating (top) compared with normal-appearing hands (bottom) after hyperhidrosis surgery. Free E-newsletter. Subscribe to Housecall. Our general interest e-newsletter keeps you up to date on a wide variety of health topics. Sign up now The first report of increased levels of sodium and chloride on sweat in cystic fibrosis (CF, MIM #219700) patients was published in 1953 .Later, Gibson and Cooke  described a method of cholinergic stimulation with pilocarpine iontophoresis on the skin to facilitate the dosage and stimulation of the sweat electrolytes.This method is known as the classic sweat test (CST), and still is.
West Village Pointe 110 N. 175th St., Suite 1000 Omaha, Nebraska 68118 Get Directions. Dundee 4825 Dodge St. Omaha, Nebraska 68132 Get Direction Sweat Chloride Test What to expect Plan to be at the hospital for about 1 hour. A Medical Laboratory Assistant (MLA) will meet with you for 10 to 15 minutes at the start of your appointment. To make the skin sweat, the MLA will put a medication on your right arm (or leg for small babies) using an electrode. No needles are used. This is not painful Sweat analysis: Key Words: cystic fibrosis, SW, SWEATT, sweat chloride: Specimen Collection: Sweat samples are collected via the Macroduct collection system. Please contact the lab for more details (01733678455). A minimum of 50mm length of sweat in the macroduct is required for analysis. Once collected, the capillary should be clamped and.
Weit unter 20% Aluminium Chloride. Frei von Parfümen. Frei von Parfümen und allergenen Duftstoffen. ja. Ohne Alkohol . ja. Frei von Konservierungsstoffen. ja. Frei von Mikroplastik. nein. Enthält Hydroxyethylcellulose. Frei von Farbstoffen. ja. Vegan. ja. Bewertungspunkte im Test: 35 von 35. In dieser Kategorie macht der Sweat-Off Roll-On eine hervorragende Figur. Sein Aluminiumanteil liegt. Sweat test; Sweat chloride; Iontophoretic sweat test. How the Test is Performed. A colorless, odorless chemical that causes sweating is applied to a small area on an arm or leg. An electrode is then attached to the spot. A weak electrical current is sent to the area to stimulate sweating. People may feel a tingling in the area, or a feeling of warmth. This part of the procedure lasts for about. A sweat teat measures the amount of sodium and chloride (salt) that is in the sweat. Sweat tests should only be performed by experienced Practitioners following national guidelines. Patient Suitability: -A sweat test can be performed after 2 weeks of age in infants greater than 3kg who are normally hydrated and without significant systemic illness. -A sweat test can be attempted in term. Sweat test Definition A sweat test, sometimes called a sweat chloride test, is a procedure used to measure the amount of sodium and/or chloride (salt) excreted by a person's sweat glands. Source for information on Sweat Test: Gale Encyclopedia of Children's Health: Infancy through Adolescence dictionary SWEAT CHLORIDE TEST REQUEST Apply Patient Label PCH10417 (Rev 2 (05/2019) *DTPHYORD* Patient Information: Patient Name: Date of Birth: Address: Male Female Home Phone: ( ) Insurance Company: ID Number: Order Information: Diagnosis: ICD 10 Code: Ordering Physician: Physician Phone: Physician Address: Physician Fax: Practitioner Signature: Date: Printed Name: Time: PLEASE NOTE THE FOLLOWING TEST.
This test measures the amount of salt (sodium and chloride) in the sweat to determine whether a child has CF. Normally, sweat has very little sodium and chloride in it. In Cystic Fibrosis there is 2-5 times the normal amount of these chemicals in the sweat. The test is done in two steps. In the first step, a colorless, odorless chemical (known to cause sweating) is applied to two small areas. The sweat test measures the amount of chloride in sweat and kids with CF have very high levels and can lose excessive amounts of salt in their sweat making them prone to severe salt and water loss as well. How is it done? No special preparation is needed before the test and your child can eat, drink and have any medications they normally need. There are no needles in this procedure. The test. (1) Background: Diagnostic testing for cystic fibrosis (CF) is based on a sweat chloride test (SCT) considering the appropriate signs and symptoms of the disease and results of a gene mutation analysis. In 2014, the Istituto Superiore di Sanità (ISS) established a pilot Italian external quality assessment program for CF SCT (Italian EQA-SCT), which is now a third party service carried out by.
Preparing for the Test. You don't need to do anything special before a blood test. If you're scheduled for a urine chloride test, you should avoid alcohol for at least 24 hours before giving a. Sweat chloride is the best discriminator and must always be included in the analysis (grade B). A sweat chloride of less than 40 mmol/l is normal and there is a low probability of cystic fibrosis. A result above 60 mmol/l supports the diagnosis. An intermediate test result is suggestive but not diagnostic of cystic fibrosis (grade B) Chloride Sweat Test. A sweat test is thought to be the most reliable way to tell if someone has CF. It checks the amount of salt in your sweat. People with CF have higher levels of chloride. Sweat test definition is - a test for cystic fibrosis that involves measuring the subject's sweat for abnormally high sodium chloride content