 He also defined the "Do not resuscitate" code in cases involving serious heart disease and other diseases, where life expectancy is very short.He introduced novel vascular suture techniques, which he presented at the International Medical Congress in Moscow in August 1897 and at the annual Congress of the Société de Chirurgie de Paris in July 1904, where he reported two cases of arterial tear during breast carcinoma resection and repair within the same session.He also reported the removal of a pen cover from the right main bronchus of a 7-year-old girl through a tracheotomy in 1903.