Organogenesis and foetal haemodynamics during the normal gestation of healthy black‐rumped agoutis (Dasyprocta prymnolopha,Wagler, 1831) bred in captivity |
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| Authors: | FCA Sousa GT Pessoa LS Moura JR Araújo RPS Rodrigues MAPS Barbosa AN Diniz AB Souza EG Silva LU Lucena MP Sanches OF Silva‐Filho PC Guerra JM Sousa WC Neves FR Alves |
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| Institution: | 1. Faculty of Medical Science, State University of Piauí, Teresina, PI, Brazil;2. Diagnostic Laboratory for Specialized Veterinary Imaging, Postgraduate Animal Science Program, Federal University of Piauí, Teresina, PI, Brazil;3. Diagnostic Laboratory for Specialized Veterinary Imaging, Veterinary Medicine Undergraduate Course, Federal University of Piauí, Teresina, PI, Brazil;4. Veterinary Medicine Course, Federal Rural University of Pernambuco, Garanhuns, PE, Brazil;5. Department of Clinical Science, Veterinary Medicine, State University of Maranh?o, S?o Luís, MA, Brazil;6. Department of Veterinary Clinic and Surgery, Federal University of Piauí, Teresina, PI, Brazil;7. Diagnostic Laboratory for Specialized Veterinary Imaging, Department of Veterinary Morphophysiology, Federal University of Piauí, Teresina, PI, Brazil |
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| Abstract: | The objective of this study was to define the patterns of organogenesis and foetal haemodynamics during the normal gestation of healthy agoutis (Dasyprocta prymnolopha) kept in captivity. Thirty pregnant agoutis that ranged in size from small to medium and weighed between 2.5 and 3 kg underwent B‐mode and Doppler ultrasonography for the biometric evaluation of the foetal organs. The foetal aortic blood flow proved to be predominantly systolic, and the measured flow velocity was 78.89 ± 2.95 cm/s, with a maximum pressure gradient of 2.12 ± 0.27 mmHg. The liver was characterized by its large volume, occupying the entire cranial aspect of the abdominal cavity, and it was associated cranially with the diaphragm and caudally with the stomach. The flow velocity in the portal vein was estimated to equal 12.17 ± 2.37 cm/s, with a resistivity index of 0.82 ± 0.05. The gallbladder was centrally located and protruded cranially towards the diaphragm. The spleen was visualized as an elongated structure with tapered cranial and caudal extremities, and the foetal kidneys were visualized bilaterally in the retroperitoneal region, with the right kidney positioned slightly more cranially than the left. The morphological characterization and hemodynamic analysis of the foetal organs of black‐rumped agoutis via B‐mode and Doppler ultrasonography allow determination of the vascular network and of reference values for the blood flow required for perfusing the anatomical elements essential for maintaining the viability of foetuses at different gestational ages. |
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