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 catheters are a special type of intravenous catheter (tube) which are usually inserted in the operating room. They are threaded through a vein in the neck (the external or internal jugular vein) or a vein in the upper chest under the collar bone (the subclavian vein) into a large central vein in the chest (the superior vena cava).