Philips Expression MR400 - Gating Source; HR Source

ExpressionMR400InstructionsforUseMonitoringECG5‐29
Note
Scale does not affect the signal analyzed by the MR400 for QRS detection and ECG gating.
Gating Source
SetsthecardiacgatingsourcebasedonameasuredsignalthatisusedforMRsystemtriggering.
(ThisisthesameoptionasintheSPO2menu.)
Thefollowingoptionsareavailable:
• ECGoutputsasignalthatrepresentsthedetectionoftheR‐peakofaQRScomplex.
(Default)
• Pulseoutputs
asignalthatrepresentsthedetectionofthepeakoftheperipheralpulse
complex.
Tosetthegatingsource
SeeAppendixDfordetails.
Note
Trace A is the default output channel for interfacing the cardiac gating input. To use Trace B, set
Trace A to off, and ensure that Trace B is active (that is, not off); see page 5-28.
HR Source
Selectsthesourcethatproducestheheartrate,asdisplayedintheECGandSPO2VSboxes
(identicaltoandinteractivewithsameoptionintheSPO2,P1andP2menus).
Thefollowingoptionsareavailable:
• Autosetsthesourceautomaticallyaccordingtothehighestpriority activeinputthatis
first
toreportvalidpatientdata.Thepriorityranking(highesttolowest)isECG,P1,P2,SPO2
(providedthattheP1andP2channelshavebeenlabeledABP;seeSetLabelonpage8‐24
fordetails).Thesourcewillbecomeunavailablewhenithasproducednovaliddatafor
a
periodoften(10)ormoreseconds.Thesystemexaminesthehighestpriorityactiveinput.
Ifnotfound,thesecond‐highestpriorityinputischosen,etcetera.Ifnonearepresent,
thenNoneisdisplayedastheheartratemeasurementnumeric.
• ECGsetsECGasthesource.(Default)
•ABP
setsABPasthesource(ifnopressurechannelislabeledABP,awarningboxwillallow
automaticrenamingandselectionbeforeproceeding;alsoseeSetLabelonpage8‐24).