Inspire Medical Systems has announced (pdf) it completed raising $40 million in series E financing.

Inspire Medical Systems, based in Minneapolis, Minn., is the developer of the Inspire system, a fully implanted and FDA-approved neurostimulation system for the treatment of obstructive sleep apnea.

The financing round was timed to coincide with the commercial launch of the Inspire upper airway stimulation therapy in the United States.

The financing was led by OrbiMed. Other new investors in the round were the Johnson & Johnson Development Corporation and Aperture Venture Partners. Existing investors of Inspire Medical Systems also participated.