MEDICAL NEAR-INFRARED SPECTROSCOPY

Correlation Between Cerebral Oxygen Metabolism and Cerebral Blood Flow Simultaneously Measured Before and After Acetazolamide Administration

[+] Author Affiliations
Hiroichiro Yamaguchi, Hideto Yamauchi, Shiro Hazama, Hirotsugu Hamamoto, Nobuhiro Inoue

Oita Prefectural Hospital, Department of Cardiovascular Surgery and Neurosurgery, 476 Bunyou, Oita?870-8511, Japan

J. Biomed. Opt. 4(4), 418-423 (Oct 01, 1999). doi:10.1117/1.429946
History: Received Feb. 18, 1999; Revised July 12, 1999; Accepted July 20, 1999
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Abstract

The cerebral circulation and metabolism of ten preoperative cardiac surgery patients were assessed. Alterations in regional cerebral blood flow (rCBF), measured by 123I-N-isopropyl-p-iodo-amphetamine single-photon emission computed tomography, and in cerebral oxygen metabolism, simultaneously detected by near-infrared spectroscopy (NIRS) before and after acetazolamide administration, were investigated. The rCBF (ml/min/100 g) increased significantly from 40.21±7.65 to 56.24±13.69(p<0.001), and a significant increase in oxyhemoglobin (Oxy-Hb) of 13.9% (p=0.0022) and total hemoglobin (Total-Hb) of 5.7% (0.0047) along with a significant decrease in deoxyhemoglobin (Deoxy-Hb) of 8.9% (p=0.0414) were observed concomitantly. Thus, the Oxy-Hb/Total-Hb ratio (%Oxy-Hb) rose significantly from 67.26±9.82% to 72.98±8.09%(p=0.0022). Examination of the relationships between individual parameters showed that the percentage changes in rCBF and Oxy-Hb were significantly correlated (r=0.758,p=0.011). The percentage changes in rCBF and %Oxy-Hb were also correlated significantly (r=0.740,p=0.014). In conclusion, this evidence suggested that NIRS is able to detect relative changes in cerebral hemodynamics and reflect luxury perfusion induced by acetazolamide. © 1999 Society of Photo-Optical Instrumentation Engineers.

© 1999 Society of Photo-Optical Instrumentation Engineers

Topics

Blood ; Oxygen

Citation

Hiroichiro Yamaguchi ; Hideto Yamauchi ; Shiro Hazama ; Hirotsugu Hamamoto and Nobuhiro Inoue
"Correlation Between Cerebral Oxygen Metabolism and Cerebral Blood Flow Simultaneously Measured Before and After Acetazolamide Administration", J. Biomed. Opt. 4(4), 418-423 (Oct 01, 1999). ; http://dx.doi.org/10.1117/1.429946


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