The patient must have nothing by mouth (NPO) 6 hours prior to the exam. The Radiologist will write the pre-operative orders. Pre-labs of CBC, PT, (PTT) may be ordered. The patient should continue all oral meds especially anti-hypertensive medications.
A chronograph is a specific type of watch that is used as a stopwatch combined with a display watch. A basic chronograph has an independent sweep second hand; it can be started, stopped, and returned to zero by successive pressure on the stem. Less simple chronographs use additional complications and can have multiple independent hands to measure seconds, minutes, hours and even tenths of a second.
A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record the motion of the ground during a quake.If you live in a city, you may have noticed that buildings sometimes shake when a big truck or a subway train rolls by.eismographs detect earthquakes and what they do is they show on a graph what movements the earthquake made. Source(s): http://en.wikipedia.org/wiki/Seismograph...