Specialty Services
Sweat Chloride Test
Sweat Chloride Test is the gold standard test for the diagnosis of Cystic Fibrosis (CF). The facility for sweat chloride estimation is available at BLK MAX Hospital.
What is the Sweat Chloride Test?
The Sweat Chloride Test measures the amount of chloride present in sweat. Elevated levels of chloride in sweat are a hallmark indicator of Cystic Fibrosis (CF), a genetic disorder affecting the lungs, digestive system, and other organs. The test is non-invasive and highly accurate, making it a preferred method for diagnosing Cystic Fibrosis (CF) in children and adults.
How is the Sweat Chloride Test Performed?
- Preparation: The test is safe for all ages, including infants. No special preparation is required, but ensuring the child is well-hydrated can aid in the procedure.
- Sweat Collection: A small area of the skin, usually on the forearm, is stimulated to produce sweat using a painless process called iontophoresis. This test involves application of two electrodes with straps (as shown in the photograph). One of these contains a filter paper with pilocarpine (A special chemical to encourage sweating). A weak electric current pushes the medicine through the skin. This is called as Quantitative pilocarpine iontophoresis (performed using the Gibson and Cooke’s method).
- Sweat Analysis: A special filter paper is then attached to the clean skin surface in the area where the sweat glands were stimulated (as shown in the photograph). The sweat is collected for 30 minutes. The sweat is then extracted from the filter paper and analyzed in a laboratory for chloride concentration.
- Results: Chloride levels below 30 mmol/L are generally considered normal, while levels above 60 mmol/L are indicative of Cystic Fibrosis (CF). Intermediate values may warrant further investigation.
Why is the Sweat Chloride Test Important?
- Early Diagnosis: Detecting Cystic Fibrosis (CF) early allows for prompt management, reducing complications and improving quality of life.
- Non-invasive Procedure: It is a straightforward and pain-free test, suitable even for newborns.
- Accuracy: The test reliably identifies Cystic Fibrosis (CF) in most cases, helping to rule out other conditions.
Common Concerns About the Sweat Chloride Test
Is it painful?
- No, the Sweat Chloride Test is non-invasive and painless. The stimulation may cause a mild tingling sensation, but most patients tolerate it well.
How long does the test take?
- The procedure typically takes about 30 to 60 minutes, including preparation and sweat collection.
Can it be done at any age?
- Yes, the test is safe and effective for individuals of all ages.
What happens if results are inconclusive?
- If results fall in the intermediate range, additional tests, such as genetic testing may be recommended.
Is it 100% accurate?
- If results fall in the intermediate range, additional tests, such as genetic testing may be recommended.
Sweat Chloride Testing Services at BLK MAX Hospital
The facility for sweat chloride testing is available at BLK MAX Hospital
