Masimo Radical Signal Extraction Betreibershandbuch PDF herunterladen (Seite 47)

Radical-7 Signal Extraction Pulse CO-Oximeter Operator’s Manual 4-7

Operation

value may be compromised. To acknowledge the Low SpHb SIQ state and display the number,

press the

icon. A numeric value will display for both SpHb and for SpOC. The “SpHb” param-

eter label will continue to flash to indicate the monitor is in a Low SpHb SIQ state.

If the user does not acknowledge the Low SpHb SIQ state, “---” will continue to be displayed

instead of a number value. To access the Max/APOD button and change the Sensitivity setting in

this situation when the

icon is displayed, press the “next page” icon.

Note: Once the Low SpHb SIQ state is acknowledged, the

icon will not be displayed again

in the same monitoring session. The SpHb parameter label will still flash to indicate a Low SpHb

SIQ state.

Severinghaus JW, Spellman MJ. Pulse Oximeter Failure Thresholds in Hypotension and

Vasoconstriction. Anesthesiology 1990; 73:532-537

ACTIONS TO BE TAKEN

If the SpO

SpCO, SpMet, or SpHb, SpOC, PVI, PI or pulse rate readings show significant

differences, do the following:

■ Make sure the emitter and detector are aligned directly opposite each other.

■ Select a site where the distance between the emitter and detector is minimized.

■ Wipe the sensor site with a 70% isopropyl alcohol pad or rubefacient cream (10-30% methyl

salicylate and 2-10% menthol) for 20-30 seconds to increase perfusion. However, strong

vasodilator creams, such as nitroglycerin paste, are not recommended.

■ If possible, remove electrical noise sources such as electrosurgical units or other electrical/

electronic equipment. If these solutions are not possible, operate the Pulse CO-Oximeter on

battery power, or try plugging the Pulse CO-Oximeter into a different electrical outlet.

■ If artificial nails or excessive fingernail polish are present, select another site or remove the

polish/artificial nails.

■ If possible, ensure that the sensor is placed in a location with low ambient or low strobing

light. Although the Radical-7 with integrated Masimo Rainbow SET technology has

significant immunity to ambient or strobing light, excessive ambient or excessive strobing

light may cause readings to be incorrect.

CAUTION: IF ANY MEASUREMENT SEEMS QUESTIONABLE, FIRST CHECK THE

PATIENT’S VITAL SIGNS BY ALTERNATE MEANS AND THEN CHECK THE

PULSE CO-OXIMETER FOR PROPER FUNCTIONING.

LOW PERFUSION

The Radical-7 Pulse CO-Oximeter displays a “Low Perfusion” message when there are very low

amplitude arterial pulsations.

It has been suggested that at extremely low perfusion levels, pulse oximeters can measure

peripheral saturation, which may differ from central arterial saturation

. This “localized

hypoxemia” may result from the metabolic demands of other tissues extracting oxygen proximal

to the monitoring site under conditions of sustained peripheral hypoperfusion. (This may occur

even with a pulse rate that correlates with the ECG heart rate.)

CAUTION: IF THE LOW PERFUSION MESSAGE IS FREQUENTLY DISPLAYED, FIND A

BETTER-PERFUSED MONITORING SITE. IN THE INTERIM, ASSESS THE

PATIENT AND, IF INDICATED, VERIFY OXYGENATION STATUS THROUGH

OTHER MEANS.

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