Baltimore-based Coaptech LLC won a green light from the U.S. FDA for its PUMA-G system, which enables ultrasound-based placement of percutaneous gastrostomy feeding tubes. The PUMA-G system is the first application of the company's Point-of-care Ultrasound Magnet Aligned (PUMA) system platform, which enables ultrasound to work in hollow organs of the body for diagnostic or interventional procedures.