Sonavex has raised nearly $2 million in equity for its ultrasound-based blood flow monitoring and other technologies.

According to an SEC Form D filed last week, Baltimore-based Sonavex made its first sale in the offering on Oct. 11 and has raised $1.8 million to date.

The Johns Hopkins University spin-out listed an indefinite amount on the offering and currently has 11 investors contributing to the $1.8 million already raised. Sonavex does not intend for the offering to last longer than one year.

Sonavex previously raised $3 million in April 2017 to support its novel ultrasound technologies.

The company’s EchoSure technology is designed to detect blood clot formation in surgical patients, as well as pipeline development of perioperative ultrasound solutions. The EchoMark is a bioresorbable polymeric implant used for marking soft tissue sites in surgical patients.