Life-threatening hemorrhage from enterotomies and anastomoses in 7 horses.
Authors: Doyle Aimie J, Freeman David E, Rapp Hans, Murrell Jose A Verocay, Wilkins Pamela A
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Life-threatening Haemorrhage Following Enterotomy and Anastomosis Between 1994 and 2001, Freeman and colleagues documented seven cases of severe intraluminal bleeding originating from intestinal incision sites or surgical joins in horses and one donkey, representing approximately 1.3% of enterotomy or anastomosis procedures performed at their institution. Clinical presentation was remarkably consistent: melena appeared within 72 hours of surgery and persisted for 12–96 hours, accompanied by acute anaemia (severe packed cell volume drops), tachycardia, and clinical signs of haemorrhagic shock; treatment included intravenous formalin infusions, whole blood transfusions, and repeat celiotomies in two cases, where a bleeding artery and a 25-cm intraluminal blood clot were identified respectively. Five of the six surgically managed cases survived to discharge, though one horse died of subsequent enterocolitis, whilst the single case managed conservatively was euthanatised with necropsy confirming blood-filled bowel from the surgical site to the anus. This complication, though rare, carries serious implications for surgical technique: meticulous ligation of large vessels at the initial procedure and careful consideration of closure methods are essential preventive measures, as no preoperative or intraoperative indicators reliably predict this life-threatening event, yet aggressive supportive care—particularly blood transfusion and fluid resuscitation—significantly improves survival prospects in affected horses.
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Practical Takeaways
- •Hemorrhage from intestinal incision edges is rare (1.3% of cases) but potentially fatal—ligate all large vessels at the original surgery and carefully select hemostatic closure techniques for large intestinal work
- •Monitor for melena and acute anemia for 72+ hours post-operatively; if detected, aggressive supportive therapy (blood transfusion, fluids) can be successful even in severe cases
- •Second surgery to identify and control bleeding vessels may be life-saving; consider it early if post-operative hemorrhage is suspected, as intraluminal clots can cause secondary obstruction
Key Findings
- •Life-threatening hemorrhage occurred in 3 of 237 horses (1.3%) undergoing enterotomy or anastomosis at the primary institution, with 4 additional cases identified at other clinics
- •Melena appeared within 72 hours post-surgery and persisted for 12-96 hours, accompanied by acute drops in packed cell volume and elevated heart rates
- •Second celiotomy identified bleeding arteries at incision edges in 1 horse and a 25-cm blood clot occluding the pelvic flexure in another
- •Five of 7 horses survived with supportive care including blood transfusions and/or intravenous formalin; mortality was associated with enterocolitis rather than hemorrhage itself