1. A device comprising: an elongated tube comprising: at least an upper profile； and at least a lower profile, said upper and lower profiles are relatively movable, so that when the distal part of said tube is placed between two tissue sections, the distance between the upper distal surface of said upper profile and the lower distal surface of said lower profile can be changed, thereby opening the space between these two sections of fabric, and the above-mentioned upper and lower profiles are also made so as to define between themselves a working channel for providing access to said space between these two tissue sections through said tube, said working channel has a vertical dimension of at least equal to the vertical distance between said upper and lower distal surfaces in a fully open state, said upper and lower distal surfaces forming an extension of the upper and lower surfaces of said working channel extending into the fabric. 2. The device according to claim 1, further comprising a sliding mechanism that is removable and can be actuated inside said tube, and which is designed to exert outward forces between the upper and lower profile so as to extend said elongated tube, thereby increasing the distance between the two areas of tissue mentioned. 3. The device according to claim 2, characterized in that said sliding mechanism can be actuated inside the said working channel for the application1. Устройство, содержащее:продолговатую трубку, содержащую:по меньшей мере верхний профиль； ипо меньшей мере нижний профиль,упомянутые верхний и нижний профили выполнены относительно перемещаемыми, так что когда дистальная часть упомянутой трубки размещена между двумя участками ткани, расстояние между верхней дистальной поверхностью упомянутого верхнего профиля и нижней дистальной поверхностью упомянутого нижнего профиля может быть изменена, открывая тем самым пространство между этими двумя участками ткани, причем упомянутые верхний и нижний профили кроме того выполнены так
