GE CARESCAPE - SpO2 wavelengths and optical output power; SpO2 measurement and interference

Pulseoximetry
SpO
2
wavelengthsandopticaloutputpower
GEOhmeda,MasimoSETandNellcorOxiMaxpulseoximetryarecalibratedtodisplay
functionalsaturation.
Thisinformationmaybeusefultoclinicianssuchasthoseperformingphotodynamic
therapy:
●NellcorOxiMaxpulseoximetrysensorscontainLEDsthatemitredlightata
wavelengthofapproximately660nmandinfraredlightatawavelengthof
approximately900nm.ThetotalopticaloutputpowerofthesensorLEDsisless
than15mW.
●MasimoSETpulseoximetrysensorscontainLEDsthatemitredlightatawavelength
ofapproximately660nmandinfraredlightatawavelengthofapproximately905
nmforLNOPandLNCS,andapproximately663nmand880nmforLNOPandLNCS
tipclips.ThetotalopticaloutputpoweroftheLEDsislessthanorequalto15mW.
●GEOhmedaSpO
2
forusewithTruSignalsensorsonly:GEpulseoximetrysensors
containLEDsthatemitredlightatawavelengthofapproximately663nmand
infraredlightatawavelengthofapproximately890or940nm.Themaximum
opticaloutputpowerforeachLEDislessthan15mW.
SpO
2
measurementandinterference
ThesetypesofinterferencecaninuencethefunctionofSpO
2
:
●Incorrectsensorapplication,e.g.,sensorplacementonanextremitywithablood
pressurecuff,arterialcatheter,orintravascularline,sensorappliedtootightly.
●Intravasculardyes,suchasidocyanineormethyleneblue.
●Externallyappliedcoloringagentswithopaquematerialsinhighambientlight
conditions,e.g.,conditionscreatedfromoneormoreofthefollowingsources:
￭Surgicallights,especiallyxenonlightsources
￭Bilirubinlamps
￭Fluorescentlights
￭Infraredheatinglamps
￭Directsunlight
●Excessivepatientactivity
●Venouspulsation
●Dysfunctionalhemoglobin
●Poor(low)peripheralperfusion
●Arterialocclusionproximaltothesensor
●Lossofpulse(cardiacarrest)
●Electromagneticinterference(EMI)
●Ventilator-inducedpressurechange
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