Sonavex | 2,006 followers on LinkedIn. Empowered Patient Care | Sonavex, Inc. is a Baltimore-based medical device company originally spun out of Johns Hopkins focused on Empowered Patient Care. The company has developed a portfolio of novel ultrasound solutions that empower patient care by delivering critical visual and quantitative data to improve outcomes and reduce costs. EchoMark is a bioresorbable and highly echogenic (visible under ultrasound) implant used to mark at-risk blood vessels such that the site can be easily assessed for future complications.