Domingo Liotta and Surgery in 1953. In 1955, he developed a technique for early diagnosis of tumors in the pancreas and ampulla of Vater (Pour le diagnostic des tumeurs du pancreas: La duodenographie hypotonique. Lyon Chirurgical, 1955). Liotta continued his medical career at the University of Lyon (France) at the "Pierre Mallet-Guy's" General Surgery Service. Then, he trained in thoracic and cardiac surgery, with Professors Paul Santy and Pierre Marion in Lyon France. His early works in the artificial heart are from 1958 in Córdoba, Argentina, where he developed an early prototype successfully used in small animals. After publishing the results of
MD Helicopters MD 600 MD Helicopters MD 600 The MD Helicopters MD 600N is a light utility civilian helicopter designed in the United States. It is a stretched eight-seat development of the five-seat MD 520N helicopter. McDonnell Douglas Helicopter Systems (MD Helicopters since 1999) first announced it was developing a stretched MD 520N in late 1994, at that time designated the MD 630N. The prototype, a modified MD 530F, had made its first flight on November 22, 1994. McDonnell Douglas gave the go-ahead for the production aircraft, redesignated the MD 600N, in March 1995. McDonnell Douglas stretched the MD 520N fuselage by inserting a