Often our talk was as irrelevant to patency as are wings.
"Friendship Village"
Zona Gale
Corrigan wrote his famous essay on the "Permanent patency of the Aortic Valve" when he was only twenty-nine years of age, and the work for it had been done during the preceding three years, at a hospital in which there were beds for only six medical patients.
"Makers of Modern Medicine"
James J. Walsh
Before publishing his classic paper on the Permanent patency of the Aortic Valves, on which his reputation as a wonderful clinical observer in medicine rests, Corrigan had called attention to some mistakes in the classification of heart murmurs as made by Laennec in Paris.
"Makers of Modern Medicine"
James J. Walsh