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Palatine Heart Center
523 Old Northwest Highway,
Barrington, IL 60010
Phone (847) 381-1200
Fax (847) 381-1904 |
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Heart Lung Center
360 Station Drive
Crystal Lake, IL 60014
Phone (815) 477-8900
Fax (815) 477-7160 |
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| Methacholine Challenge Test |
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| Methacholine Challenge Test |
| Methacholine challenge testing (MCT) is one method of assessing airway responsiveness. Airway hyper responsiveness is one of the features that may contribute to a diagnosis of asthma. It may vary over time, often increasing during exacerbations and decreasing during treatment with anti-inflammatory medications. MCT is most often considered when asthma is a serious possibility and traditional methods have not established or eliminated the diagnosis. |
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| MCT evaluates how sensitive the airways in your lungs by measuring your response to the medication methalcholine, which provokes narrowing in the airways (bronchoconstriciton). During the test, we do spirometry, which shows how much air you can breathe in and out and how fast you can breathe in and out, both before and after you inhale nebulized methalcholine medication. These spirometry results are then compared to one another to see what changes there are in your breathing after being exposed to the nebulized methacholine. People with asthma or hyper reactive airways, react to lower doses of inhaled methacholine |
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| How do you get ready for the test? |
| Please follow these directions when getting ready for this test. These medicines will affect the results of some of these tests and need to be stopped before the testing is done. If the medicine is not stopped before the test we will not be able to accurately complete the test. |
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- If able, stop this inhaled medicine for 7 days before your appointment:
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- If able, stop these inhaled medicines for 48 hours before your appointment:
- Advair® (Serevent® and Flovent®)
- Serevent® (Salmeterol)
- Symbicort® (Pulmicort® and Foadil®)
- Foradil® (Formoterol)
- PerforomistTM (Formoterol)
- BrovanaTM(Arformoterol)
- Intal® (Cromolyn), Tilade® (Nedocromil)
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- If able, stop these inhaled medicines for 24 hours before your appointment:
- Atrovent® (Ipratropium)
- Combivent® (Albuterol and Ipatropium)
- DuoNeb® (Albuterol and Ipatropium)
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- If able, stop these oral medicines for 24 hours before your appointment:
- Accolate® (zafirlukast)
- Zyflo® (zileuton)
- Singular® (montelukast)
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- If able, stop these oral medicines for 24 hours before your appointment:
- Volmax®, Ventolin®, Proventil®, Proventil Repetabs® (Albuterol), Metaprel® (Metaproterenol), Bricanyl®, Bethaine® (Terbutaline)
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- If able, stop these inhaled medicines for 6-8 hours before your appointment:
- Proventil HFA®, Ventolin HFA®, ProAir® (Albuterol), Xopenex® (Levalbuterol), Maxair® (Pirbuterol), Alupent®, Metaprel® (Metaproterenol), Primatene® Mist.
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| Continue to take all your other medicine as you usually do. |
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