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25 Cards in this Set

  • Front
  • Back
path of electrical signal
brain-electrode-headbox-amplifier-computer-display
two types of electrode derivations
referential
bipolar
Which signals use DC amplifier?
oximetry, CPAP, pressure transducer
the degree of magnification of the amplifier signal
gain
measure of the response of an instrument to an incoming signal
sensitivity
Ohms law
V=SD
a low sensitivity setting produces _____
a large signal change (deflection)
fall time constant
seconds for a square wave to decay to 37% of its maximum amplitude (is determined by LFF)
minimum sampling rate
2.5X greater than highest HFF
charge of cornea
positive (+)
charge of retina
negative (-)
max signal averaging for pulse oximetry
3 seconds
gold standard airflow
pneumotachometer
normal ETCO2
35-45 mmHg
Score hypoventilation if there is _____
> 10 mmHG increase in PaCO2 compared to awake supine
arousal
abrupt shift of EEG for at least 3 seconds following 10 sec sleep
arousals scored from ____
central or occipital
3 'R's of ECG evaluation
Rate
Regularity
Rhythm
3 or more PVCs in a row
ventricular tachycardia
Most common type of CSA
Cheyne-Stokes
OSA
drop > 90% of baseline and at least 10 seconds, continued resp effort
hypopnea
30% reduction with 4% desat
50% reduction with 3% desat
10 sec
RERA
at least 10 sec of increased resp effort or flattening of nasal pressure leading to arousal
sensor for apnea
oronasal thermal
sensor for hypopnea
nasal pressure transducer