Robot to assist with knee surgery Dr. Jeffery Peterson, center, of Pinnacle Orthopaedics talks with medical professionals during training for the new robot which will be used to assist total knee replacement surgery at the hospital. The future is now at Ascension Saint Thomas River Park. Latest Five Below on its way Business Pulse- A real gem of a family Business Pulse- Hey batter, batter ... swing! Business Monthly- Rocket science? Precisely!