Comparison of cerebral metabolic rate of oxygen, blood flow, and bispectral index under general anesthesia.
Neurophotonics
; 10(1): 015006, 2023 Jan.
Article
in En
| MEDLINE
| ID: mdl-36911206
ABSTRACT
Significance:
The optical measurement of cerebral oxygen metabolism was evaluated.Aim:
Compare optically derived cerebral signals to the electroencephalographic bispectral index (BIS) sensors to monitor propofol-induced anesthesia during surgery.Approach:
Relative cerebral metabolic rate of oxygen ( rCMRO 2 ) and blood flow (rCBF) were measured by time-resolved and diffuse correlation spectroscopies. Changes were tested against the relative BIS (rBIS) ones. The synchronism in the changes was also assessed by the R-Pearson correlation.Results:
In 23 measurements, optically derived signals showed significant changes in agreement with rBIS during propofol induction, rBIS decreased by 67% [interquartile ranges (IQR) 62% to 71%], rCMRO 2 by 33% (IQR 18% to 46%), and rCBF by 28% (IQR 10% to 37%). During recovery, a significant increase was observed for rBIS (48%, IQR 38% to 55%), rCMRO 2 (29%, IQR 17% to 39%), and rCBF (30%, IQR 10% to 44%). The significance and direction of the changes subject-by-subject were tested the coupling between the rBIS, rCMRO 2 , and rCBF was witnessed in the majority of the cases (14/18 and 12/18 for rCBF and 19/21 and 13/18 for rCMRO 2 in the initial and final part, respectively). These changes were also correlated in time ( R > 0.69 to R = 1 , p - values < 0.05 ).Conclusions:
Optics can reliably monitor rCMRO 2 in such conditions.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Neurophotonics
Year:
2023
Type:
Article
Affiliation country:
Spain