GE CARESCAPE - Page 203

Pulseoximetry
WARNING
Manyfactorsmaycauseinaccuratereadingsandalarms,
decreasedperfusion,andorlowsignalstrength:
●Interferingsubstances:
￭CarboxyhemoglobinmayerroneouslyincreaseSpO
2
reading.
￭Methemoglobin(MetHb)usuallyrepresentslessthan1%
ofthetotalHb,butinthecaseofmethemoglobinemia
thatcanbecongenitalorinducedbysomeIVdyes,
antibiotics(suchassulphas,)inhaledgasesetc.this
levelincreasessharplyandthuscancauseinaccuracies
intheSpO
2
reading.
￭Intravasculardyes(suchasindocyaninegreen,
methyleneblue,etc.)
●Physiologicalcharacteristics:
￭Cardiacarrest
￭Hypotension
￭Shock
￭Severevasoconstriction
￭Severeanemia
￭Hypothermia
￭Venouspulsations
￭Darklypigmentedskin
￭Ventricularseptaldefects(VSDs)
●Environmentalconditions:
￭Excessiveambientlight
￭Electricalinterference
￭Electrosurgery
￭Debrillation-Maycauseinaccuratereadingforashort
amountoftime.
￭Excessivepatient/sensormotion.Artifactcansimulate
anSpO
2
reading,sothatthemonitorfailstosoundan
alarm.Inordertoensurereliablepatientmonitoring,the
properapplicationoftheprobeandthesignalquality
mustbecheckedatregularintervals.
●Sensorplacement:
￭Incorrectsensorplacement-prolongedmonitoringor
incorrectsensorapplicationcancauseskinirritationor
impairedcirculation.Itisrecommendedthatyoucheck
theprobesiteeveryfourhours(morefrequentlyforpoor
perfusionorforneonates).Refertotheinstructions
suppliedwiththesensor.
￭Sensorplacementonthesameextremityasablood
pressurecuff,arterialcatheterorintravascularline;or
arterialocclusionproximaltothesensor.
￭Poorsensort.
￭Donotallowtapetoblockthesensorlightemitterand
detector.
2062971-001CARESCAPEModularMonitors203