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).
A central venous catheter is a tube that goes into a vein in your chest and ends at your heart. Sometimes this type of catheter is attached to a device called a port that will be under your skin. The port and catheter are put in place in a minor surgery. The catheter helps carry nutrients and medicine into your body. It will also be used to take blood when you need to have blood tests.