Updated February 24, 2017. The mean or average birth weight in the United States is about 3,389g or 7 lb, 7.5 oz. However, any birth weight of a term newborn between 5 lbs, 8 oz and 8 lbs, 13 oz is considered to be normal. Baby Birth Weight Statistics.
Development of coronary stents. WALLSTENTÂ® (Schneider AG), a self-expanding, stainless steel wire-mesh structure, was the first coronary stent implanted in a human coronary artery by Sigwart et al. in 1986.
Artificial Hearts The history of artificial hearts. Willem Kolff invented both the first artificial heart and the first artificial kidney-dialysis machine. Heart Lung Machine The first heart-lung machine was built by physician John Heysham Gibbon in 1937. Gibbon performed the first human open heart operation in 1953.illem Kolff invented both the first artificial heart and the first artificial kidney-dialysis machine. Heart Lung Machine The first heart-lung machine was built by physician John Heysham Gibbon in 1937. Gibbon performed the first human open heart operation in 1953.