Morphometric characteristics of different types of splenic venous vasculature’s structural components

Objective: to establish morphometric characteristics of different types of splenic venous vasculature’s structural components - bi-units (BUs) in males and females, of the 1st and 2nd periods of adulthood. Materials and methods. The study is based on the results of a morphometric study of corrosion casts of the splenic venous system of 64 people (32 men, 32 women; 32 first period of adulthood, 32 second period of adulthood) who died of sudden death and accidental causes between the ages of 21 and 60. The diameters (D) and lengths (L) of the venous segments forming the BU were measured. The splenic venous vasculature was represented as a system consisting of four types of BU: 1 - complete asymmetry, the values of the internal diameters of the proximal segment (D), the distal segments with larger diameter (dmax) and the distal segment with smaller diameter (dmin) are not equal- D≠dmax≠dmin; 2 - lateral asymmetry, D=dmax and dmax≠dmin; 3 - unilateral symmetry - D≠dmax≠dmin and dmax=dmin; 4 - complete symmetry, D=dmax=dmin. Results. All four types of BUs are present in the composition of splenic venous vasculature; the relative number, of the total number of BUs of splenic venous vasculature type 1 is 55.2%; type 2 - 4.7%, type 3 - 38.0%, type 4 - 2.1%; the presence of a reliable relationship between the relative number of BUs of different types, sex and age group; the sizes of all four types of BUs were determined; the largest size is BU of type 1, and the smallest - BU of type 4; the most symmetrical bi-unites are of types 3 and 4, the most asymmetrical - of types 1 and 2; the relative number of BU of type 1 decreases, BU of type 3 increases, and types 2 and 4 practically do not change in the direction from proximal to distal parts of the vasculature. Conclusion. The results obtained can serve as a foundation for the creation of a morphometric reference standard of splenic venous vasculature and should be taken into account in its numerical modelling.

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