[2] From 1957, while working at the Medical University of Warsaw, he was the head of the Department of Experimental Surgery of the Polish Academy of Sciences.
In 1956, he undertook a two-month internship at the Leriche Surgical Clinic in Strasbourg, France, in, 1963 he stayed at a month-long internship at the Institute of Heart Surgery and Vessels in Moscow, and in 1967 he spent three months at the Surgical Clinic of the University of London at the Hammersmith Hospital.
[2] The most influential was a year-long stipend he received in 1958 from the Rockefeller Foundation at the Surgical Clinic of Harvard University in Boston, USA.
He applied pioneering methods in the surgeries of acute diseases of the abdominal cavity, the esophagus, stomach, pancreas, bile ducts, and kidneys.
The surgical team had been preparing to start the clinical transplantation program for over two years, practicing the surgery on dogs.
Experiments were designed to demonstrate the signs and symptoms of acute kidney allograft rejection, and to investigate the influence of several drugs used for its treatment.
[9] The recipient, a 18-year-old nursing school student, had been prepared for surgery and taken care afterwards in the Department of Medicine by nephrologist Tadeusz Orłowski and his team.
In the span of a few minutes, the implanted kidney started functioning and the surgery was celebrated as successful.
He was referenced as such in 2015, on the celebration of the 100th anniversary of his birth by the Clinic of General, Vascular and Transplant Surgery at the Medical University of Warsaw.