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, or seismometer, is an instrument used to detect and record seismic waves.Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with sensitive detectors called seismographs.ideo: How a seismograph works. The magnitude of an earthquake is determined by readings of the seismic waves resulting from the vibrations generated by the seismic source. Sensitive seismographs, which greatly magnify these ground motions, can detect strong earthquakes from sources anywhere in the world.