methacholine
/ˌmɛθəˈkoʊlin/
noun
- A chemical compound used in medical tests to check for asthma or other lung conditions by causing the airways to narrow.
- The doctor used methacholine to see how sensitive the patient's lungs were.
- Methacholine is often used in hospitals to diagnose asthma in both children and adults.
- During the methacholine challenge test, the nurse measured the patient's breathing after each dose.