Share Email Print

Proceedings Paper

Evaluation of the optimized surgical illuminant for enhancement of blood oxygen saturation
Author(s): Yoko Kurabuchi; Kazuya Nakano; Takashi Ohnishi; Toshiya Nakaguchi; Markku Hauta-Kasari; Hideaki Haneishi
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

In open surgery, observing organ blood circulation and distinguishing artery and vein are important to improve precision of surgery. However, there are some difficulties in this judgement and distinction because there are only slight color differences in the color of ischemic or healthy organs. Peripheral vessels between artery and vein also have subtle difference in their color. The difference in absorption coefficients between oxygenated and deoxygenated hemoglobin mainly affects these characteristics. Therefore, if the illuminant spectrum can be optimized based on the optical properties, there is a possibility to enhance the difference between the two types of vessels and blood-oxygenation levels. To achieve these purposes, we conducted a spectroscopic design of a surgical illuminant combining 14 kinds of commercially available light-emitting diode (LED) spectra by maximizing color differences between blood samples. Spectral reflectance of the blood samples whose oxygen saturation (SO2) measured in advance were employed for computer simulation. In this study, we prototyped a spectrally tunable light source which contains the same LED sets used in the simulation of the surgical illuminant. A conventional illuminant and the designed illuminant spectrum were spectrally adjusted by the spectrally tunable light source to evaluate the effectiveness of the optimal illuminant. Two kinds of cattle blood samples that have different SO2 were enclosed in glass cells and covered with cattle artery for subjective evaluation. Research participants were instructed to compare the color of samples and to sort these blood samples in a SO2 order under the two illuminant conditions. The percentage of correct answers under the designed illuminant was superior to that under the conventional illuminant. This results showed the effectiveness of the designed illuminant.

Paper Details

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11229, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XVIII, 1122912 (21 February 2020); doi: 10.1117/12.2545675
Show Author Affiliations
Yoko Kurabuchi, Chiba Univ. (Japan)
Kazuya Nakano, Chiba Univ. (Japan)
Takashi Ohnishi, Chiba Univ. (Japan)
Toshiya Nakaguchi, Chiba Univ. (Japan)
Markku Hauta-Kasari, Univ. of Eastern Finland (Finland)
Hideaki Haneishi, Chiba Univ. (Japan)

Published in SPIE Proceedings Vol. 11229:
Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XVIII
Anita Mahadevan-Jansen, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?