How Does the Sweat Test for Cystic Fibrosis Work?
• First, your doctor will rub a small amount of a chemical called pilocarpine on your arm or leg. • Then your doctor will attach an electrode to this spot. The electrode provides a mild electric current that produces sweat. This may cause tingling or a feeling of warmth. • Then your doctor will cover the area with a gauze pad or filter paper and wrap it in plastic. • After 30 to 40 minutes, your doctor will remove the plastic so that the sweat that collected on the pad or paper can be analyzed.
