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FDA Approves New Device for Adults with Severe and Persistent Asthma
Date:4/27/2010

SILVER SPRING, Md., April 27 /PRNewswire-USNewswire/ -- The U.S. Food and Drug Administration today approved the first medical device that uses radiofrequency energy to treat severe and persistent asthma in certain adults.

(Logo: http://www.newscom.com/cgi-bin/prnh/20090824/FDALOGO)

The Alair Bronchial Thermoplasty System is intended for patients ages 18 and older whose severe and persistent asthma is not well-controlled with inhaled corticosteroids and long-acting beta agonist medications.

The device is composed of a catheter with an electrode tip that delivers a form of electromagnetic energy, called radiofrequency energy, directly to the airways. A controller unit generates and controls the energy.

Inflammation causes the airways of people who have asthma to swell and narrow, making breathing difficult. The Alair system treats asthma symptoms by using radiofrequency energy to heat the lung tissue in a controlled manner, reducing the thickness of smooth muscle in the airways and improving a patient's ability to breathe. To benefit, patients will require multiple sessions targeting different areas in the lungs.

"The approval of the Alair system provides adult patients suffering from severe and persistent asthma with an additional treatment option for a disease that is often difficult to manage," said Jeffrey Shuren, M.D., J.D., director of the FDA's Center for Devices and Radiological Health.

The FDA based its approval on data from a clinical trial of 297 patients with severe and persistent asthma. The trial showed a reduction of severe asthma attacks with use of the Alair system.

The FDA is requiring a five-year post-approval study of the device to study its long-term safety and effectiveness. The device manufacturer, Asthmatx, will follow many of the patients who were enrolled in the clinical trial and enroll 300 new patients at several medical centers across the United States.

Possible side effects during the course of treatment may include asthma attacks, wheezing, chest tightness or pain, partially collapsed lung (atelectasis), coughing up blood (hemoptysis), anxiety, headaches, and nausea. The Alair system is designed to reduce the number of severe asthma attacks on a long-term basis. However, there is a risk of immediate asthma attacks during the course of the treatment.

The Alair system is not for use in asthma patients with a pacemaker, internal defibrillator, or other implantable electronic device. Also, those patients with known sensitivities to lidocaine, atropine, or benzodiazepines should not use the device.  Alair has not been studied for success in retreatment of the same area of the lung. Currently, patients should not be retreated with the Alair system in the same area of the lung.  

Asthma patients considering the Alair system should not be treated while the following conditions are present: an active respiratory infection, coagulopathy (bleeding disorder), asthma exacerbations, or if they have had changes to their corticosteroid regimen 14 days before the proposed treatment.

Asthmatx Inc. is based in Sunnyvale, Calif.

For more information:

Medical Device Approvals at FDA

http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/DeviceApprovalsandClearances/default.htm

Media Inquiries: Dick Thompson, 301-796-7566, dick.thompson@fda.hhs.gov

Consumer Inquiries: 888-INFO-FDA


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SOURCE U.S. Food and Drug Administration
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