Thomas W. Davison

THOMAS W. DAVISON is President and Chief Executive Officer of Sontra
Medical Corporation. Since joining Sontra in May 2002, Dr. Davison has
led the company’s transition from an early stage R&D company to a
product development company that is preparing to launch its first
product. Prior to joining Sontra, Dr. Davison was the Chief Executive
Officer of Endius, Inc., which he founded in 1997. At Endius, Dr.
Davison invented and commercialized the first endoscopic spine fusion
technology and surgical procedure. Developments at Endius are changing
the way spine surgeons approach spinal fusion. Prior to Endius, Dr.
Davison was the co-Founder and President of UltraCision, the technology
leader in ultrasonic surgery. While at UltraCision, he led a team of
engineers who developed the Harmonic Scalpel, including two engineers
who are currently at Sontra. Dr. Davison holds 15 patents including four
on ultrasonic surgical technologies that led to the development of the
Harmonic Scalpel. UltraCision and the Harmonic Scalpel were sold to
Ethicon Endosurgery, a Johnson & Johnson company, in late 1995. Today,
the UltraCision Harmonic Scalpel is a gold standard in laparoscopic
surgery and Harmonic Scalpel sales exceed $300 million worldwide. Dr.
Davison also has held various executive management and technical
positions within the medical technology industry during his 32-year
career. Dr. Davison holds a BA in Biology/Chemistry and a PhD in
Mammalian Physiology from Kent State University.