Avista Capital-backed Probo Medical, a global provider of medical imaging equipment, parts, repair and service, completed the acquisition of National Ultrasound, one of the largest ultrasound marketing and sales organizations in the US. Financial terms were not disclosed. "National has a deep history for their sales and marketing prowess, selling new and pre-owned ultrasound equipment to private practices across the country. They have leveraged that position to expand into the veterinary market. The opportunity to connect this expertise to our world-class ultrasound sales, service, and repair services is tremendously exciting," Michael Asmer, Probo CEO.