Dec 4, '04. a cordis is a large-bore, usually single-lumen central line. it can be placed ij, subclavian, or femoral. it is also sometimes called an introducer, becuase it is frequently used as a pathway for a swan ganz (pa catheter) or transvenous pacer (the swan or pacer is floated through the cordis).
Best Answer: Why are they called 'magic markers'? The inventor Sidney Rosenthal named his new marking device Magic Marker because of its ability to mark on almost every surface. History of Pens & Writing Instruments. The first marker was probablythe felt tip marker, created in the 1940's. It was mainly used for labeling and artistic applications.
It had a sponge-tipped handle and was filled with different paint colors. These marker pens were not commercially viable and didnât sell. In 1944, Walter J. De Groft patented a marking pen that held ink in liquid form in its handle and used a felt tip. This is the patent that will become a âSharpieâ pen in 1964. First modern (and usable) marker pen was Sidney Rosenthal's âMagic Markerâ which he invented and started selling in 1953. This marker had glass tube of ink for a body and a felt wick and its name comes from a fact that it was able to write on any surface.