Sams Monitoring/Surg Notecards Flashcards
What are the two different classifications of neuro monitoring?
Blood Flow/Metabolic
Name 3 blood flow monitors?
Cerebral oximetry
Transcrania doppler
Jug Bulb Venous O2 saturation
Name 4 nervous system function monitors
EEG SSEP BAEP VEP MEP
What law estimates brain tissue saturation?
Beer–lambert
Beer lambert law devise that detects decreases in CBF in relation to CMRO2?
Cerebral Oximetry Near–Infrared Spectroscopy
Name 5 things that change accuracy of cerebral oximetry
BP PaCO2 Hgb Regional blood flow Scalp O2
Measure NIRS initially when?
Prior to induction
What is your goal in maintaining NIRS during surgery?
75% of baseline
When is NIRS used the most? 2nd most?
Carotid surgery
Cardiac surgery
Normal cerebral venous O2 saturation?
60–80%
Limitation of NIRS?
ONly measures regional oxygenation
What rule says that the depth of tissue being measured by NIRS is directly proportional to the distance between the LED and sensor?
Spatial Resolution
NIRS monitors what lobe?
Frontal
Do electrocautery interfere with NIRS?
Yes
What displays the difference between regional O2 and baseline?
Delta Base
What index quantifies that depth and duration of patient staying under user–define rSO2 limit alarm?
Area Under Curve (AUC)
What is shorthand for NIRS tissue oxygen saturation?
rSO2
What displays the differnce between SpO2 and rSO2?
Delta SpO2
The top number in NIRS is the _ side of the head.
Left
Trancranial doppler ultrasonography measures _____ not ______.
Velocity not Volume
Narrowed segments of blood will show increased ________ even though there is lower volume of blood traversing.
Velocity
TC Doppler is MOST commonly positioned over the _______ to monitor the ______.
Temporal Bone
MCA
Would increased temporal bone thickness mess with your doppler?
Yes
Where does the doppler measure blood flow velocity?
Circle of Willis