US Patent 11857186 Proximal loaded disposable loading unit for surgical stapler

A loading unit removably loadable into a surgical instrument positioned within a body of a patient having an elongated member, first and second jaws at a distal portion and a firing mechanism movable within the elongated member to effect firing of fasteners into the tissue clamped between the first and second jaws. The loading unit is insertable into a proximal opening of the instrument and through a lumen in the shaft of the instrument while the instrument is positioned in the body of the patient. The first and second jaws extend distally of the shaft of the instrument and the loading unit is actuable by the instrument. A surgical instrument to receive the loading unit and a method for reloading the instrument are also provided.