This photo portrays perfusionist Jack S. ("Stan") Fennig working with an early version of a heart-lung machine. (A perfusionist is a technician who operates a heart-lung machine.) The ganged roller pumps with console suggest a main pump for driving blood through a heart-lung machine, plus additional pumps with less capacity for coronary perfusion and also for suctioning up blood from the surgical field. These were standard in the mid-1970s. The vertical draped plastic arrangement was a type of disposable bubble oxygenator. Such oxygenators were commonly used in the early days of heart-lung machines. They caused significant blood trauma and were later replaced by more efficient and less traumatic designs.