 A new technique for closing anal fistula is currently in development with the use of a closure clip nitinol OTSC Proctology Laboratory: OVESCO and French Distributor: Life Partners. This new technique has been validated in a porcine model of anal fistula, ensuring the safety of the device. A first case was published in a patient with complex anal fistula high trans-sphincteric. After erosion fistula tract with a special brush, a nitinol clip OTSC Proctology was deposited on the internal opening of the fistula. Eight months after surgery, the fistula was healed and the clip was removed by cutting with special pliers. This technique is currently being broadcast and dozens of patients were treated with this clip without any further scientific validation of the process. 