Equine venography and its clinical application in North America.

The article discusses the usage and benefits of a medical imaging technique called digital venogram in diagnosing and treating horse foot disease known as laminitis.

Digital Venogram and Laminitis

• The digital venogram is an x-ray procedure that uses a contrast agent to visualize the foot’s soft tissues and blood vessels. This particular method is instrumental in diagnosing laminitis—a common painful foot condition in horses that affects the tissues (laminae) that connect the pedal bone and the hoof wall.
• The venogram reveals changes in the foot’s structure before these alterations become visible through regular plain-film radiographs. The early detection of laminitis ensures that the horse receives appropriate treatment promptly, potentially preventing further injury and reducing the horse’s discomfort.

Role in Treatment and Prognosis

• A venogram doesn’t merely assist in the diagnosis of laminitis; it also guides clinicians in devising the most suitable treatment plan. Based on the venogram’s findings, veterinarians can adjust therapies to effectively target the cause of the laminitis.
• This imaging procedure is also used to continuously monitor the horse’s response to treatment. Repeated venograms (serial venograms) allow veterinarians to track changes in the foot’s anatomy over the course of therapy. This provides critical insights into whether the disease is regressing or progressing, thus informing adjustments to the treatment.

Implications for Treatment Alteration or Prognosis

• If the venogram shows no improvement, it suggests two possible outcomes. First, the administered treatment is ineffective and must be altered to have any therapeutic benefit.
• The second possible outcome is that the damage to the foot is too extensive for any treatment to have a beneficial effect, leading to an unfavorable prognosis for the horse. The decision between changing the treatment or acknowledging a poor response to therapy will be guided by the veterinarian’s clinical judgement in light of venogram findings.