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. 2019 Feb 1:25:920-927.
doi: 10.12659/MSM.911726.

3D Reconstruction and Evaluation of Accessory Hepatic Veins in Right Hemilivers in Laboratory Animals by Metrotomography: Implications for Surgery

Affiliations

3D Reconstruction and Evaluation of Accessory Hepatic Veins in Right Hemilivers in Laboratory Animals by Metrotomography: Implications for Surgery

Lenka Kresakova et al. Med Sci Monit. .

Abstract

BACKGROUND The current study investigated the detection of accessory hepatic veins and their vascular territories in the right hemiliver in rats, guinea pigs, and rabbits, which has become a prerequisite for newly developed clinical procedures. We compared the anatomical continuity of accessory hepatic veins with accessory hepatic veins existing in human livers. MATERIAL AND METHODS The analysis of accessory hepatic veins was performed using a corrosion cast method in combination with computer tomography (CT). RESULTS In normal livers, accessory hepatic veins were regularly found. The length of these veins was 0.88±0.29 (cm ±SD) in rats, 1.10±0.39 in guinea pigs, and 1.28±0.48 in rabbits. Accessory hepatic veins became a part of the draining vessel draining into segment VI and VII; represented by interpolating and following Chouinard's segmental concept. CONCLUSIONS The importance of detecting accessory hepatic veins lies in the identification of structures requiring special attention during surgery, in reduction of surgical complications, and in choosing the best approach to maintain the vitality of a drainage segment. The vascular reconstruction should be done during surgical interventions.

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Conflict of interest statement

Conflicts of interest

None.

Figures

Figure 1
Figure 1
Veins of right hemiliver in a laboratory rat (A), guinea pig (B), and rabbit (C). Corrosion cast, ventral view, RHV – right hepatic vein; SRHV – superior right hepatic vein; IRHV – inferior right hepatic vein; AHV – accessory hepatic veins; VC – caudal vena cava.
Figure 2
Figure 2
Arrangement and measurement of proper hepatic veins and accessory hepatic veins by using metrotomography in rats (A) and rabbits (B). CT scans; veins are viewed from the lateral side. RHV – right hepatic vein; SRHV – superior right hepatic vein; IRHV – inferior right hepatic vein; AHV – accessory hepatic veins; VC – caudal vena cava.
Figure 3
Figure 3
The frequency of occurrence and length of accessory hepatic veins in selected laboratory animals. Occurrence was determined by the number of cases within 1 liver. The maximum number of accessory hepatic veins in 1 liver was 5 for rats and rabbits and 3 for guinea pigs. The longest measured length of accessory hepatic veins was 1.4 cm for rats, 1.7 cm for guinea pigs, and 2 cm for rabbits.
Figure 4
Figure 4
Comparison of incidence of accessory hepatic veins between laboratory rats, guinea pigs, and rabbits. The occurrence is identified with the number of cases within 1 liver. There was a dominant presence of 1 or 2 accessory hepatic veins in all laboratory animals.
Figure 5
Figure 5
Comparison of the length of accessory hepatic veins among laboratory rats, guinea pigs, and rabbits. The length of accessory hepatic veins (mean ±SD) was 0.88±0.29 in rats, 1.28±0.48 in rabbits, and 1.10±0.39 in guinea pigs.

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