Spectrophotometric assessment of peritoneal fluid haemoglobin in colic horses: an aid to selecting medical vs. surgical treatment.

This research shows that the concentration of haemoglobin in the peritoneal fluid of horses suffering from colic can help determine whether surgical or medical treatment is necessary. The study found a higher concentration typically indicates the need for surgical intervention.

Research Objectives and Hypothesis

• The study aimed to test the effectiveness of the spectrophotometric measurement of haemoglobin in the peritoneal fluid of horses with colic as an indicator of the required treatment type (surgical or medical).
• The researchers hypothesised that horses in need of surgery would present a higher concentration of haemoglobin in the peritoneal fluid compared to those that could be managed with medical treatment.

Research Methodology

• The study involved 74 horses admitted to a teaching hospital, with 35 necessitating surgery and 39 requiring medical treatment.
• The team examined the correlation between the haemoglobin concentration, measured with a spectrophotometer, and the required treatment, using logistic regression.

Findings and Conclusions

• The results showed a significant link (P < 0.0001) between the haemoglobin concentration and the need for surgical treatment.
• Every increase in haemoglobin concentration of 0.01 mmol/l increased the likelihood of the ‘need for surgical treatment by 6.4 times.
• Employing a diagnostic test with a threshold of 0.01 mmol/l haemoglobin for deciding surgical versus medical treatment yielded 80% sensitivity and 82% specificity.
• In contrast, merely relying on a visual assessment of the peritoneal fluid’s color provided a sensitivity of only 51% and a specificity of 95%.
• These findings validate the hypothesis that a higher haemoglobin concentration in the peritoneal fluid points to a need for surgical intervention.
• Spectrophotometric assessment of the peritoneal fluid provides a more accurate and objective measure than visual inspection when determining the appropriate treatment method for colic in horses.