A luminal cavity closing device can include a flexible linear shaft, a clamping mechanism which is provided at a distal portion of the shaft and has at least two arms, and a detachment mechanism configured to enable detachment of the clamping mechanism from the shaft. The arms of the clamping mechanism can be configured so as to be insertable into hollow tubular structures located adjacent to and on both sides of a luminal cavity present in a hollow tubular structure bifurcation area. The clamping mechanism operates between an expanded state wherein the interval of the arms is enlarged to a contracted state wherein the interval of the arms is contracted.
