Radical pneumonectomy for bronchial carcinoma

vessels more clearly; it also demonstrated the futility of carotid ligation in these cases, as well as the inadequacy of occlusion of some of the larger feeding vessels only, as it has been from time to time recommended. The value of any auxiliary method of examination increases with its ease and safety of performance. We trust that though our method has not proved infallible, a very high proportion of successful angiograms justifies a wider trial. Even if it may not be equally successful in other hands I believe that it will become an important part of the armamentarium of neuroradiologist and neurosurgeon. Having two or three reasonably successful methods of examination at our disposal, we should rarely fail to secure satisfactory vertebral angiograms.