Abstract. The blood microcirculation of the pancreas in rats with diabetes was studied using Laser Speckle Contrast Imaging (LSCI). The impact on blood flow of x-ray contrast "Omnipaque TM -300" (n = 1.438) and aqueous solution of "Omnipaque TM -300" (n = 1.407) used as optical clearing agents (OCAs) was also investigated. The alloxan induced animal model of diabetes was exploited. The results obtained in the study of blood microcirculation disorders of pancreas in diabetes and under topical application of optical clearing agents show that disease development in animals causes changes in the microcirculatory system response to application of "Omnipaque TM -300" solutions.

The influence of ischemia–reperfusion (I/R) action on pancreatic blood flow (PBF) and the development of acute pancreatitis (AP) in laboratory rats is evaluated in vivo by using the laser speckle contrast imaging (LSCI). Additionally, the optical properties in norm and under condition of AP in rats were assessed using a modified integrating sphere spectrometer and inverse Monte Carlo (IMC) software. The results of the experimental study of microcirculation of the pancreas in 82 rats in the ischemic model are presented. The data obtained confirm the fact that local ischemia and changes in the blood flow velocity of the main vessels cause and provoke acute pancreatitis.

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