1 1902 Willis Haviland Carrier invented the first air conditioner to control the temperature and humidity of a printing company, marking the first time effort taken to control the temperature of the surroundings. 2  This starts the history of air conditioning.
Following the introduction and widespread use of central venous catheters (CVCs) in adult patients, these devices are now frequently used also in the pediatric population. They have become an indispensable route for venous access, especially in pediatric intensive care units (PICUs).
Central Venous Access Via External Jugular Vein. Author: Rick McPheeters, DO, FAAEM; Chief Editor: Vincent Lopez Rowe, MD more... Background. Central venous catheterization, or central line placement, was first described in 1929 by Werner Forssman, a surgical intern who catheterized his own heart through his cephalic vein.