Following division of the PA, normal saline solution will be injected through the controlled pressure syringe pump in order to achieve an intralumenal vascular pressure until the bursting pressure is reached. Intralumenal pressure will be recorded at a frequency of 10 times per second. The bursting pressure will be recorded. Ex-vivo experimentation will take approximately 20 to 30 minutes. Burst pressure of the in-vivo endo-stapled (Endopath® ETS, 35mm, 2.5mm staples, white cartridge; Ethicon, Cincinnati, Ohio, USA) main lobar PA branches will be evaluated and recorded ex-vivo on the same specimens.