Document Detail

Influence of patient variables and sensor location on regional cerebral oxygen saturation measured by INVOS 4100 near-infrared spectrophotometers.
MedLine Citation:
PMID:  14508170     Owner:  NLM     Status:  MEDLINE    
Cerebral oximeter based on near-infrared spectroscopy has been used as a continuous, noninvasive monitoring of regional cerebral oxygen saturation (rSO2). Although the absolute rSO2 values have a wide range of variability, the factors affecting a variability of rSO2 values have not been extensively investigated. The authors investigated the influence of patient variables and sensor location on rSO2 measured by the cerebral oximeter INVOS 4100 in 111 patients anesthetized with sevoflurane, fentanyl, and nitrous oxide in oxygen. The sensors for rSO2 measurements were applied on the right forehead (R), 1 cm lateral to R (R1), on the left forehead (L), 1 cm lateral to L (L1), and on the center of the forehead (C). The relationship between the rSO2 values and patient variables were also analyzed. Values of rSO2 at R1 and L1 were significantly lower than those at R and L, respectively. Values of rSO2 at C were significantly higher compared with those at other sites. There were no significant correlations between the rSO2 values and values of weight, height, and head size. Values of rSO2 were similar between males and females. A significant negative correlation between the rSO2 values and age and a positive correlation between the rSO2 values and hemoglobin concentration were observed. These data indicate that patient age, hemoglobin concentration at the measurement, and sensor location can affect rSO2 values.
Katsuyoshi Kishi; Masahiko Kawaguchi; Kenji Yoshitani; Toshihiro Nagahata; Hitoshi Furuya
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of neurosurgical anesthesiology     Volume:  15     ISSN:  0898-4921     ISO Abbreviation:  J Neurosurg Anesthesiol     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-09-25     Completed Date:  2004-02-12     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8910749     Medline TA:  J Neurosurg Anesthesiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  302-6     Citation Subset:  IM    
Departments of Anesthesiology, Bell Land General Hospital, Osaka, Japan.
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MeSH Terms
Age Factors
Aged, 80 and over
Brain / blood supply,  metabolism*
Cerebrovascular Circulation / physiology
Hemoglobins / analysis
Middle Aged
Monitoring, Intraoperative
Oximetry / instrumentation,  methods*
Oxygen / blood*
Oxygen Consumption / physiology
Spectroscopy, Near-Infrared / instrumentation,  methods*
Reg. No./Substance:
0/Hemoglobins; 7782-44-7/Oxygen

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