St. Charles Health System has given Bend startup JettStream Inc. approval to conduct clinical trials of its asthma-delivery device, according to a news release issued Monday.

With the approval, the company can begin small-scale manufacturing of the JettPak, an asthma nebulizer accessory that delivers the medicine to children while they sleep, according to co-founder and lead engineer Matt Smith. He and Sarah Cota, JettStream co-founder and president, created the JettPak last year.

The in-home trials are expected to begin in May and last three months, according to the news release.

JettStream is accepting applications for the trial. For more information go to, www.jettstreaminc.com.