A surgical instrument (100), comprising: jaw members having an open position and an approximate position, including the jaw members an anvil jaw member (160) and a cartridge assembly (170), having the assembly of cartridge (170) a replaceable cartridge, including the replaceable cartridge a blade (400b)； and a firing rod (320b) having, in the approximate position, a first position and a second position, resulting in the proximal and distal translation of the firing rod (320b) and a pivoting connector (360) a proximal translation and blade distal (400b)； the pivot connector (360) disposed distally and adjacent to the firing rod (320b), the pivot connector (360) and the blade (400b) being configured such that when the jaw members are in the approximate position, the pivot connector (360) and the blade (400b) are linked and in such a way that when the jaw members are in the open position, the pivot connector (360) and the blade (400b) are detached； where when the jaw members are moved to their open position, the blade (400b) contacts the pivoting connector (360) to pivot the pivoting connector (360) with respect to the distal end of the firing rod, thus creating enough space or more space for the blade (400b) to be removed from the surgical instrument (100), and where when the jaw members are approximate, the pivoting connector (360) pivots, thus linking or further linking the pivoting connector (360 ) with the blade (400b), thus not allowing the blade (400b) to be removed from it.Un instrumento quirúrgico (100), que comprende: miembros de mordaza que tienen una posición abierta y una posición aproximada, incluyendo los miembros de mordaza un miembro de mordaza de yunque (160) y un conjunto de cartucho (170), teniendo el conjunto de cartucho (170) un cartucho reemplazable, incluyendo el cartucho reemplazable una cuchilla (400b)； y un vástago de disparo (320b) que tiene, en la posición aproximada, una primera posición y una segunda posición, dando como resultado la tras
