card

I'm not a paramedic, so i wanted to ask a quation about somthing i watch on a tv show, goes like this: <i>Station 14, Card 29,</i> <i>auto versus pedestrian.</i> <i>52nd and Woodland. CPD already on scene.</i> <i>Can you copy?</i> Or in another episode: Station 14 Card 28. Stroke. Patient is...