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).
Care of Your Central Venous Catheter. Patients receiving treatment for various illnesses may have a central venous catheter (CVC) inserted. A catheter is a soft hollow tube. The central venous catheter is placed into a large vein leading into the heart and comes out through a small opening in the chest area. This opening is called the exit site.