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Looking back, the field of perfusion technology grew mainly out of need and AMSECTevolved out of both need and a desire to improve the status quo. In the late '30s and early '40s, the early years of cardiac surgery, the technology of extra-corporeal circulation as known today, was nonexistent. Surgical procedures were relatively simple by today's standards and the need for pulmonary and circulatory support was not paramount.
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Leroy H. Ferries (1981) studied this question.
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