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 needle is used to put the catheter into a vein in your forearm or hand, and then the needle is removed, leaving the catheter in the vein with the hub outside the skin. A regular IV catheter can only stay in for a few days, at most, so if you need to be treated over weeks or months, you will need many IVs. Central venous catheters (CVCs) are also called central venous access devices (CVADs), or central lines. They are used to put medicines, blood products, nutrients, or fluids right into your blood. They can also be used to take out blood for testing. Many different kinds of CVCs are available. The 2 most common types are the port and the PICC line. Why would I need a central venous catheter? Most chemotherapy (chemo) drugs are put right into your bloodstream. Putting needles and catheters in the small veins of your arms or hands repeatedly, can cause wear and tear and scarring in the veins.