The diagnosis and surgical correction of congenital portosystemic vascular anomalies in two calves and two foals.

The study discusses the diagnosis and surgical remedy of two calves and two foals with congenital abnormalities in their portosystemic vascular system, contributing to central nervous system disease symptoms. The findings suggest that surgical correction can lead to significant health improvements with the right paracostal celiotomy approach displaying superiority over the ventral median approach.

Research Objectives and Methods

• The main objective of the study was to diagnose the presence of portosystemic anomalies, a condition characterized by the abnormal connection of the portal vein, and the systemic circulation, in four animals – two calves and two foals. These anomalies lead to diffuse effects on the central nervous system.
• Diagnosis was informed by the animals’ history, clinical signs, and unusually high serum concentrations of blood ammonia and total serum bile acids. Also, normal rates of liver-derived enzymes in the blood serum were noted.
• A specific imaging technique called intraoperative contrast portography was used on all animals to help in the diagnosis and location of these portosystemic shunts.

Results of the Research

• Unfortunately, one calf died before the imaging could be conducted. However, the remaining calf and both foals exhibited considerable health improvement following intensive medical therapy.
• Surgical correction procedures were then applied on these three animals with an aim to correct the vascular anomalies. This surgery proved successful in one of the foals.

Insights on the Surgical Approach

• The study found that the most effective method for accessing the portal vascular system and shunt is through a surgical procedure called right paracostal celiotomy.
• This approach was found to be superior in effectiveness and efficiency compared to another procedure called the ventral median approach.

Conclusion

• The findings of this study highlight the significance of surgical intervention in managing portosystemic anomalies in animals, especially when the ineffective ventral median approach is replaced with the more superior right paracostal celiotomy.
• The study also demonstrates the role of intensive medical therapy, efficiently improving the health of the afflicted animals before surgical interventions are considered.