Dr. John H. Gibbon, Jr. and Jefferson\u27s Heart-Lung Machine: Commemoration of the World\u27s First Successful Bypass Surgery

On May 6, 1953 at Jefferson Medical College Hospital, Dr. John Heysham Gibbon, Jr., his staff, and with the help of his latest-designed heart-lung machine, “Model II,” closed a very serious septal defect between the upper chambers of the heart of eighteen-year-old Cecelia Bavolek. This was the first successful intercardiac surgery of its kind performed on a human patient. Ms. Bavolek was connected to the device for three-quarters of an hour and for 26 crucial minutes, the patient totally depended upon the machine’s artificial cardiac and respiratory functions. “Jack” Gibbon did not follow this epoch-making event by holding an international press conference or by swiftly publishing his achievements in a major medical journal. In fact he later recalled that it was the first and only time that he did not write his own operative notes (which were supplied by Dr. Robert K. Finley, Jr.). According to a recent biographical review by C. Rollins Hanlon, “Therein lies a hint of the complex, unassuming personality behind the magnificent technical and surgical achievement of this patrician Philadelphia surgeon.”https://jdc.jefferson.edu/jeffhistoryposters/1000/thumbnail.jp

Tool for reading psychrometric charts

Three-legged, clear plastic tool is designed so that the angles of each leg correspond with the angles of psychometric chart construction for each of the three required scales. The appropriate edges are tapered to the chart surface

On a game theoretic cardinality bound

The main purpose of the paper is the proof of a cardinal inequality for a space with points $G_\delta$, obtained with the help of a long version of the Menger game. This result improves a similar one of Scheepers and Tall

Topological games and productively countably tight spaces

The two main results of this work are the following: if a space $X$ is such that player II has a winning strategy in the game \gone(\Omega_x, \Omega_x) for every $x \in X$, then $X$ is productively countably tight. On the other hand, if a space is productively countably tight, then \sone(\Omega_x, \Omega_x) holds for every $x \in X$. With these results, several other results follow, using some characterizations made by Uspenskii and Scheepers