In medicine, a central line is a catheter[?] placed into a large vein near the heart. This is used for the intravenous administration of large quantities of fluids, or the administration of fluids over a long period of time.
... 18 - Cary Grant, actor (+ 1986)
January 22 - George Balanchine, choreographer (+ 1983)
January 26 - Ancel Keys, scientist
February 1 - S. J. Perelman[?], humorist, ...