Philips Expression MR400 - Perfusion Index Value; Positioning the wSpO2 Module for Scanning

6‐6MonitoringSPO2ExpressionMR400InstructionsforUse
Perfusion Index Value
Whenenabled,the displayedperfusionindexvalue(seepage6‐8)isanindicationofthepulsatile
portionoftheSpO2signalcausedbythepati ent'sarterialbloodflow.Ifyouneedanindicationof
changeinpulsevolume,useperfusionin dexvalue.Thisvaluecanalsobeusedasa
quality
indicatoroftheSpO2measurementfromthemodule.Thetablebelowprovidesgeneralguidelines
regardingthisindexvalue.
Note
If a Low Perf alarm is generated, see page 4-32 for corrective actions.
Positioning the wSpO2 Module for Scanning
WAR NIN G
The wSpO2 module must be kept outside the MR system bore or image distortion may
result.
Toensurethebestperformance,specificpositioning
considerationsarerequiredwhenusingthewSpO2modulein
theMRmagnetroom,includingduringharshscansequences
withperipheralnervestimulationlevelsabove80percent.
Whileconsideringthescantobeperformed:
•PlacethewSpO2moduleonornearthepatientandas

closeaspossibletotheboreopening;
• KeeptheSpO2 probeandwSpO2moduleoutsidetheMR
systembore;
•PlacethewSpO2moduleonacushionedsurfaceto
minimizeMRvibrations;and,
•CovertheSpO2attachmentsiteonthepatientwith
opaquematerial.
PerfusionIndexValue Meaning
Above1.0
Optimal–highqualityreadings
0.3to1.0
Acceptable–goodqualityreadings
Below0.3
Marginal–Attachmentpositionshouldbeadjusted
oranothersiteshould beused.