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Case Reports
. 2017 Sep;65(9):527-531.
doi: 10.1007/s11748-016-0727-z. Epub 2016 Nov 29.

Evaluation of cerebral circulation during retrograde perfusion by laser speckle flowgraphy

Fumiaki Kimura  1 , Hirotsugu Kanda  2 , Yuki Toyama  2 , Takayuki Kunisawa  2 , Taiji Nagaoka  3 , Akitoshi Yoshida  3 , Hiroto Kitahara  1 , Hiroyuki Kamiya  4
Affiliations
Case Reports

Evaluation of cerebral circulation during retrograde perfusion by laser speckle flowgraphy

Fumiaki Kimura et al. Gen Thorac Cardiovasc Surg. 2017 Sep.

Abstract

Laser speckle flowgraphy (LSFG) is an ophthalmologic equipment that qualitatively detects the blood flow of the optic nerve head, which is known to be related with cerebral microcirculation. LSFG can also measure the mean blur rate, which quantitatively calculates the blood flow. We aimed to assess the utility of LSFG in the evaluation of cerebral perfusion during aortic surgery under hypothermic circulatory arrest with retrograde and antegrade cerebral perfusion. Two patients underwent total arch replacement for aneurysm. The blood flow of the optic nerve head was monitored with LSFG and the mean blur rate value was measured during the surgery. The LSFG could detect the blood flow quantitatively in the optic nerve head during both retrograde and antegrade cerebral perfusion; and the value was correlated with rSO2 value.

Keywords: Cerebral circulation; Laser speckle flowgraphy; Retrograde cerebral perfusion.

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Conflict of interest statement

The authors had full control of the design of the study, methods used, outcome parameters, analysis of data and production of the written report. All material used in this study were purchased.

Figures

Fig. 1
Fig. 1
The laser speckle flowgraphy equipment was set on the patient’s left eye during surgery
Fig. 2
Fig. 2
Laser speckle flowgraphy showing retinal blood flow map in patient 1. Red field, area with higher blood flow
Fig. 3
Fig. 3
Laser speckle flowgraphy in patient 2. Red field, area with higher blood flow
Fig. 4
Fig. 4
The time course of the mean blur rate (MBR) value and regional cerebral oxygen saturation value (rSO2) during surgery in two patients
See this image and copyright information in PMC

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