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32 Cards in this Set
- Front
- Back
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How many hertz is a "Beta" waveform
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15-30
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How many hertz is a "Alpha" waveform
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9-14
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How many hertz is a "Theta" waveform
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4-8
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How many hertz is a "Delta" waveform
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1-3
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List in sequence "fastest to slowest" the EEG waveforms
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Beta>Alpha>Theta>Delta
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-Awake, normal, alert, consciousness
What EEG waveform does this describe? |
Beta
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-Relaxed, calm, meditation, creative visualisation
What EEG waveform does this describe? |
Alpha
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-Deep relaxation and mediation, problem solving
What EEG waveform does this describe? |
Theta
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Deep, Dreamless sleep
What EEG waveform does this describe? |
Delta
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In the absence of a pathologic process, how are EEG amplitude and frequency related?
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Inversely related
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A simultaneous decrease in EEG amplitude and frequency may indicate what?
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ischemia, anoxia, or excessive hypnosis
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A simultaneous increase in EEG amplitude and frequency may indicate what?
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seizure activity or artifact
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Type of CNS monitoring where "auditory stimuli travels to the auditory nerve and then on to the cerebral cortex"
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"auditory evoked potentials"
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This type of CNS monitoring is ideal for Cardiac surgery b/c there is very little change in the signal as the temperature of the body changes
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auditory evoked potentials
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Defined as a doppler wave transmitted through the temporal bone to the large vessels
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Transcranial doppler ultrasonography
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What artery is viewed when using a transcranial doppler signal
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The middle Cerebral Artery
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What EEG monitoring technique can be used to detect emboli
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Transcranial Doppler
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What EEG monitoring technique can be used to detect improper head position prior to the start of cardiopulmonary bypass
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Transcranial Doppler
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What EEG monitoring technique can be used to detect if the Aortic perfusion cannula has not been properly placed
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Transcranial Doppler
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An oximeter probe that is inserted into the Jugular venous system and it measures continuous cerebral oxygen saturation
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Jugular Bulb Oximetry
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What are the 2 major limitations to Jugular Bulb Oximetry
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1. the vascularity of the skull is extremely varied and placement of the catheter may not accurately reflect vascular return
2. Low flow states may give inaccurate measures |
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Measures intravascular hgb concentrations in the skull, and is the most rapidly growing method of monitoring d/t its ease of use and accuracy
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Cerebral Oximetry
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T or F
The human skull is translucent to infrared light |
True
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May be used during nonpulsatile cardiopulmonary bypass and even circulatory arrest
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Cerebral Oximetry
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________ is primarily used to quantify change, However a value below 50 is associated with?
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cerebral oximetry
cognitive deficits |
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Cerebral Oximetry is good choice to help measure abrupt changes during what procedure
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carotid endarterectomy
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When should Cerebral Oximetry be instituted?
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once the pt enters the OR to establish a baseline
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A simple change such as turning the head to place a PA catheter could have what effects on the cerebral oximetry reading
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will cause large decreases in cerebral oximetry reading
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This type of monitoring is the weighted sum of electroencephalographic subparameters derived to give a single value
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BIS monitoring
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on the BIS scale-0 equates to ________, and 100 equates to ______
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silent EEG and 100 equate a fully awake patient
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What BIS value indicates an appropriate level of sedation for GA
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40-60
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