Kit comprising a medical fixing element and a device for placing said fixing element

The kit comprises a needle for placing the fixing element, and the fixing element comprises at least one stop part and a threaded deformable part joined to said stop part. According to the invention, the needle and the fixing element comprise means for detachably connecting the stop part to the proximal part of the needle, said connection being solid enough to enable the stop part to remain integral with the needle during the manipulation of the kit when said kit is handled, also enabling it to be introduced into the body of a patient and enabling the needle to be introduced into a wall, said connection, however, being able to be released when a traction force is exerted upon the needle, in the direction in which the needle is inserted, beyond a force threshold which is greater than the stress exerted upon the fixing element as a result of said manipulation, whereby release of the fixing element enables the stop part to be brought into a non-deformed position by means of elastic recall of said connection.