Physical and clinical pathological findings associated with experimentally induced rupture of the equine urinary bladder.

The research is aimed at understanding the physical and clinical changes that occur in horses following the experimental induction of urinary bladder rupture. The study specifically investigates changes in laboratory parameters and their diagnostic value.

Methodology

• The researchers experimentally induced bladder rupture in two mature horses. Post-rupture, they monitored various physical and clinical parameters to understand the body’s response to such an event.
• They measured and evaluated hematology, serum and peritoneal fluid components, including sodium, potassium, calcium, phosphorous, creatinine, urea nitrogen, and albumin over time.

Results

• Hyponatremia (low sodium levels in the blood) and hyperkalemia (high potassium levels) were observed following the bladder rupture. The researchers also found increased concentrations of peritoneal fluid potassium and inorganic phosphorus.
• Additionally, the peritoneal fluid creatinine:serum creatinine and peritoneal fluid urea nitrogen:serum urea nitrogen ratios were monitored over time.
• The hematology and cytology of peritoneal fluid indicated an inflammatory response due to the contamination of the abdominal cavity by urine.
• Physical indicators such as tachypnea (rapid breathing), tachycardia (fast heart rate) and mild colic (abdominal pain) were absent until nearly 50 hours post-rupture.

Conclusions

• Based on these findings, the researchers concluded that the ratio of peritoneal fluid creatinine: serum creatinine is the most useful antemortem diagnostic aid in such scenarios. This is likely because an increase in the ratio can be indicative of a ruptured bladder, as it shows that creatinine has moved from the bladder into the peritoneal cavity due to the rupture.

Overall, the study extends our understanding of the physiological and clinical changes that occur following bladder rupture in horses, providing crucial insights that may help in diagnosing such conditions and managing them effectively.