Abdominal radiography in monitoring the resolution of sand accumulations from the large colon of horses treated medically.
Authors: Ruohoniemi M, Kaikkonen R, Raekallio M, Luukkanen L
Journal: Equine veterinary journal
Summary
# Editorial Summary Ruohoniemi et al. (2001) retrospectively analysed 14 horses presenting with radiographically confirmed sand accumulations in the cranioventral abdomen and clinical signs consistent with sand enteropathy, tracking their response to medical management with serial abdominal radiographs. Medical treatment predominantly comprised psyllium mucilloid, with magnesium sulphate and mineral oil added as needed, though the initial radiographic appearance of sand deposits—including their number, size and shape—proved unreliable for predicting treatment response. Resolution times varied considerably: some accumulations cleared within 2–4 days with psyllium monotherapy or combined with mineral oil, whilst others persisted for 1–4 weeks despite treatment, particularly in horses with concurrent gastric or large colon impaction; three horses showed limited response to psyllium but resolved following repeated magnesium sulphate doses, and one required extended pasture management. A key practical finding was that clinical improvement did not necessarily correlate with radiographic resolution of sand, highlighting the importance of serial imaging to confirm clearance rather than relying on clinical signs alone. For practitioners managing sand colic, this work demonstrates that abdominal radiography is essential for objectively monitoring treatment efficacy and identifying cases where additional intervention or alternative management strategies are warranted, particularly those with concurrent impactions or poor initial response to standard laxative protocols.
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Practical Takeaways
- •Cranioventral abdominal radiography is useful for monitoring sand accumulation resolution and confirming treatment efficacy in horses with sand enteropathy
- •Response to psyllium treatment is unpredictable based on initial sand appearance; concurrent impactions may limit treatment success and require extended therapy or alternative interventions
- •Clinical signs may improve before or without complete radiographic resolution of sand, so radiographic confirmation is important for treatment planning
Key Findings
- •Large sand accumulations resolved in 2-4 days with psyllium alone or combined with mineral oil in 4 horses
- •In 4 horses with concurrent gastric or large colon impaction, accumulation size decreased but varying amounts persisted despite 1-4 weeks of treatment
- •Three horses with limited psyllium response achieved resolution with repeated magnesium sulphate doses with or without mineral oil
- •Clinical improvement was not necessarily correlated with radiographic resolution of sand accumulations