Antithrombin III activity in horses with colic: an analysis of 46 cases.

This research article examines the connection between Antithrombin-III (AT-III) activity in horses affected by colic and the outcome of their treatment. The findings suggest that horses with lower AT-III activity are less likely to survive colic, with 60% of normal activity being a key threshold.

Overview of the study

• The study was conducted on a sample size of 46 horses that were referred with colic, a digestive disorder that is considered a common cause of death in horses.
• The Antithrombin-III (AT-III) activity of these horses was measured at the time of admission. AT-III is a protein that helps prevent blood clotting and its activity levels can reflect health conditions in the body.

Comparison of AT-III activities

• The researchers compared AT-III activities between horses that were treated medically or surgically and those who survived or did not survive.
• The mean AT-III values for the horses treated medically (76.2%), surgical survivors (69.5%), and surgical non-survivors (55.9%) were significantly different from the benchmark value for healthy adults, which ranged between 92% to 108%.

AT-III activity and Survival outcomes

• The study found that the mean AT-III activity of the survivors was significantly higher than that of the non-survivors, with majority of the survivors (11 to 13 horses) demonstrating AT-III activities exceeding 60% of normal.
• In contrast, AT-III activity in about 10 out of the 14 non-surviving horses was less than 60% of normal activity, indicating a potential correlation between lower AT-III activity and higher mortality.

Key findings

• The research thus appears to point towards a critical threshold of approximately 60% of normal AT-III activity, below which the chances of a horse’s survival from colic dramatically decrease.
• These findings suggest a potential role of AT-III activity as a prognostic indicator in horses afflicted with colic, although further research would be needed to confirm the strength and consistency of this relationship.