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No more puffing on the inhaler or popping pills. The Alair system is an experimental surgical procedure that could ward off asthma attacks without drugs. During three half-hour treatments, a doctor snakes a catheter into the lungs’ airways, where it extends a basket-like tip that pushes against the airway walls. The system delivers a 10-second pulse of radio-frequency energy, heating the surrounding muscles, which limits their ability to contract—the typical wheeze-inducing reaction to triggers like dust. Clinical tests are now under way. asthmatx.com
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