High-frequency surgical apparatus and high-frequency surgical method for closure of patent foramen ovale

A high-frequency surgical method for closure of patent foramen ovale, the high-frequency surgical method using a high-frequency probe to close the patent foramen ovale in a heart by application of high-frequency power, comprising:

• a puncturing step of puncturing valvula foraminis ovalis adjacent to the atrial septum with a distal end of the high-frequency probe from the atrial septum for treatment by the application of high-frequency power;
• a penetrating step of causing a distal end of the high-frequency probe, punctured into the valvula foraminis ovalis by the puncturing step, to penetrate the atrial septum and the valvula foraminis ovalis;
• a flexing step of flexing a flexing section installed near the distal end of the high-frequency probe by operating from a proximal end of the high-frequency probe;
• a hauling step of hauling of the high-frequency probe toward a proximal side so as to cause a flexed part of the flexing section to contact a tissue of the valvula foraminis ovalis with the flexing section kept flexed;
• and
• a supplying step of selecting at least different combinations of electrodes, a plurality of times, from among three or more electrodes installed at the distal end of the high-frequency probe and supplying high-frequency power for treatment to the selected electrodes.