Effect of pleurotomy on lung function after CABG surgery

Pleurotomy means opening of the pleural Cavity(Pleura means lung's cover)during internal mammary artery harvest(the artery that supplies chest wall,pleura,esp breast in female...mammaRY GLAND MEANS BREAST,this artery is used as conduit for bypass in CABG Surgery)causes deterioration of pulmonary function (pulmonary means lung)after CABG(coronary artery bypass graft surgery,coronary artery means ..the arteries which nourishes heart..in this surgery bypass route is created in the blocked coronary arteries to reestablished blood flow in heart ) Surgery