Wireless asthma inhaler training device could help save thousands of A&E visits and lives

By Dr. Ananya Mandal, MDMar 13 2012

Many asthma patients are not trained adequately to inhale from asthma inhaler devices. This is a problem that can be both serious and expensive considering some 5,000 people visit the emergency room due to and 11 people die from asthma every day, according to the Asthma and Allergy Foundation of America.

A new device, a T-Haler, a digital asthma inhaler training device developed by researchers at Cambridge Consultants could help train patients. Patients can use the inhaler and, via interactive software linked to the wireless device, get real-time visual feedback on the areas that need improving.

The T-Haler is looking for three factors that determine how effectively the drugs are delivered in what is called a metered dose inhaler:

• whether patients have shaken the device before breathing in;
• whether they use sufficient force when breathing in;
• whether they press down the canister that releases the drug at the optimal time.

Cambridge Consultants conducted a small study on 50 people ages 18 to 60 who had no prior experience with either asthma or inhalers and were given no instruction on how to use an inhaler. When tested, about 80 percent of the participants used an inhaler incorrectly. They were then given the T-Haler with no further instruction and told to begin. A three-minute on-screen tutorial guided them through the proper use of an inhaler, and the success rate tripled to more than 60 percent.

“Without any human direction beyond the word 'go', participants went from around a 20 percent success rate without training to a success rate of more than 60 percent after only three minutes with the T-Haler device,” said Kate Farrell, a senior design engineer, in a news release. “This is more than twice the compliance rate we have seen in other studies with trained participants. Interestingly, a week later, 55 percent were still correctly using the device--showing that they retained what they learned.”

One type of inhaler, called the AeroChamber, already addresses the improper use of metered dose inhalers with a system that improves the delivery of medicine via a mask, anti-static chamber, and more. Still, it is only prescribed to those who have difficulty using traditional inhalers, and of course comes with its own set of instructions.

Cambridge Consultants said the tools could help the estimated 235 million asthma sufferers worldwide to get the most from their inhaler and potentially reduce the millions spent annually on asthma-related emergency room admissions. A company spokesperson says the device is still a concept product, but that it was designed as a training device to be available at pharmacies, schools, and clinics for children and adults alike.