Why do we drain peritoneal fluid slowly in foals with uroabdomen?

• A. Hypotension from hypovolemia and drop in BP
• B. To reduce infection risk
• C. To minimize pain
• D. To prevent bradycardia

Answer: (A)

When the foal has uroabdomen, a large amount of urine collects in the abdominal cavity, creating a third-space fluid reservoir. If that fluid is removed quickly, there can be a rapid shift in circulating volume and abrupt changes in preload to the heart. The foal’s cardiovascular system may not tolerate such a sudden decrease, so blood pressure can plummet. Draining the fluid slowly helps maintain hemodynamic stability while you relieve distension and begin correcting electrolyte disturbances. The other ideas (infection risk, pain, or bradycardia) aren’t the primary reason for slowing drainage; the key point is preventing a swift drop in blood pressure from rapid fluid removal.