US Patent 9480472 Minimally invasive portal system

A minimally invasive surgical portal system, kit, device and method may include a top ring assembly removably connected to an arm of a table mounted frame to provide stability and a secure trajectory. The portal system may include a top-ring assembly which may mount to an arm of a table mounted frame. The system may include a removable connection mechanism comprising a spring loaded collar configured to removably connect the top ring assembly to a table mounted frame. A variable adjustment positioner may be removably connected to the arm of the table mounted frame. The system may also include a depth positioning mechanism. The system may further include a light source configured to be placed down the portal tube.