Abstract
Purpose
Laser speckle flowgraphy (LSFG) is a noninvasive method for quantitative evaluation of blood flow using the mean blur rate (MBR) as the blood flow index. We investigated whether LSFG can intraoperatively detect the demarcation line after vessel dissection and reduce the incidence of anastomotic leakage (AL).
Methods
This study included 36 patients who underwent left-sided colorectal surgery. First, we compared the demarcation line (determined by LSFG) with the transection line (TL) at which the marginal vessels were divided. We then measured the MBR on both sides of the TL to determine where the MBR changed significantly. We investigated the presence or absence of significant differences between the MBR on the proximal side and that on the distal side of the TL. Finally, we retrospectively compared the patient characteristics and AL rates in the LSFG group (n = 36) and control group (n = 87).
Results
In total, 58.3% (21/36) of the demarcation lines determined by LSFG matched the TL. The median distance between the demarcation line determined by LSFG and the TL was 0.0 mm (0.0–12.1 mm). The MBR sharply decreased at the TL in 80.6% (29/36) of cases. The median MBR was significantly lower on the distal than proximal side. The AL rate was not significantly lower in the LSFG group than in the control group.
Conclusion
LSFG accurately detected the demarcation line during surgery. However, LSFG did not reduce the incidence of AL.
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Acknowledgments
We thank Angela Morben, DVM, ELS, from Edanz Group (https://en-author-services.edanzgroup.com/), for editing a draft of this manuscript.
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Study conception and design: Tomoaki Kaneko, Kimihiko Funahashi. Acquisition of data: Mitstunori Ushigome, Kimihiko Yoshida, Yasuyuki Miura, Akiharu Kurihara. Analysis and interpretation of data: Satoru Kagami, Takamaru Koda, Yoshitaka Murakami. Drafting of the manuscript: Tomoaki Kaneko. Critical revision of the manuscript: Kimihiko Funahashi.
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This study was approved by the Ethics Committee of Toho University Omori Hospital (M17229).
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All patients provided informed consent to undergo the procedures described in this report.
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Kaneko, T., Funahashi, K., Ushigome, M. et al. Noninvasive assessment of bowel blood perfusion using intraoperative laser speckle flowgraphy. Langenbecks Arch Surg 405, 817–826 (2020). https://doi.org/10.1007/s00423-020-01933-9
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DOI: https://doi.org/10.1007/s00423-020-01933-9