Leah Kegler has joined the Advanced Medical Technology Association (AdvaMed; Washington) as VP of government affairs. Kegler recently was associate director of the National Economics Council at the White House.

• CAS Medical Systems (Branford, Connecticut) has named Nathan Harris as VP of sales and marketing. Harris was most recently VP of U.S. sales and global marketing at Salient Surgical Technologies. CAS Medical makes products for non-invasive patient monitoring.

Gary Newsome was named president/CEO of Health Management Associates (HMA; Naples, Florida). Newsome most recently was president of hospital operations of the division of Community Health Systems that includes hospitals in Illinois, New Jersey, Pennsylvania, Tennessee and West Virginia. HMA owns and operates 56 hospitals, with roughly 8,000 licensed beds, in non-urban communities located throughout the U.S.

• Nextrials (San Ramon, California) reported the addition of Chief Technology Officer Robert Barr and VP of Global Sales and Marketing Michelle Dockhorn to its executive staff. Barr is the former VP of software engineering for ClinPhone, while Dockhorn most recently was VP of global sales and marketing at Focus Bio-Inova and IBT Laboratories. Nextrials makes electronic data capture solutions.

Helen Park has been named interim CEO of Power3 Medical (Houston). Park is a co-founder of Advanced BioChem, where she was CEO and chairman. Power3 specializes in cancer and neurodegenerative disease biomarkers, pathways, and mechanisms of diseases.

• Tryton Medical (Research Triangle Park, North Carolina) has appointed Brett Farabaugh to the position of CFO and Douglas Ferguson as VP of regulatory & clinical. Farabaugh recently was CFO for StrikeIron, while Ferguson has more than 18 years of experience in regulatory and clinical affairs for medical device companies, including roles in compliance, R&D and quality assurance. Tryton Medical makes stent systems for cardiovascular disease.

• Volcano (San Diego) said that Olav Bergheim, the company's chairman, will resign from the board of directors effective as of the close of business on Jan. 1, 2009. A co-founder of Volcano, Bergheim is the managing director of Fjord Ventures, a venture capital firm he founded, and has served as chairman of Volcano's board since 2001. Volcano makes intravascular ultrasound and functional measurement technology.