Philips Expression MR400 - Zeroing the Pressure Transducer

8‐16MonitoringInvasiveBloodPres sure ExpressionMR400InstructionsforUse
Note
When monitoring invasive blood pressure, routinely inspect the catheter and/or pressure line for
leaks after zeroing, and always follow the pressure transducer/catheter manufacturer’s use
recommendations.
Zeroing the Pressure Transducer
WARNING
The transducer must be zeroed prior to the MRI examination after the transducer is in its
final setup position. Moving the transducer after zeroing may cause a measurement offset to
occur. Otherwise, inaccurate patient pressure readings may result.
Toavoidinaccuratepressure readings,themonitorrequiresavalidzero.Zerothetransducerin
accordancewithyourhospitalpolicy(atleastonceperday).Youmustperformazero:
• whenyouuseanewtransducerortubing,
• everytimeyoureconnectthetransducercabletothemonitor,or
• ifyouthinkthemonitor’spress urereadingsarenotcorrect.
Tozeroapressuretransducer
Refertotheappropriateprocedureaccordingtothepatienttypeandapplication:
•Adult/Pediatric—seepage8‐7.
• Neonate—seepage8‐12.
P1 and P2 Waveforms and VS Boxes
Invasivebloodpressuremeasurements(P1andP2)aredisplayedaswaveforms(traceEandtrace
F,respectively)intheVStraceareaofthescreenandasnumericinformationintheP1andP2VS
boxes.Otherdata,includingP1‐andP2‐relatedalarm information,arealsoprovidedinthese
areas
ofthescreen,asdetailedbelow.