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).
What is a central venous catheter used for? Give long-term medicine treatment for pain, infection, or cancer, or to supply nutrition. A central venous catheter can be left in place far longer than an intravenous catheter (IV), which gives medicines into a vein near the skin surface. Give medicines that affect the heart, especially if a quick response to the medicine is wanted. Give large amounts of blood or fluid quickly.