Anterograde venography may improve tarsal imaging in horses

Anterograde tarsal venography may give equine clinicians a clearer map of the hock’s venous anatomy than the traditional retrograde approach, according to a new study in The Veterinary Journal. In seven horses, researchers found that distal venous access via the vena digitalis dorsalis communis II produced significantly better vascular filling and vessel visualization in the tarsal region than proximal, retrograde access. The authors say that makes the anterograde approach the stronger option not only for venography, but potentially for intravenous regional limb perfusion in horses with tarsal-region disease or infection. (vetmed.okstate.edu)

Why it matters: For equine veterinarians, better contrast distribution in the tarsal region could translate into more reliable imaging when evaluating hock pathology and a more targeted route for regional limb perfusion, which is widely used to treat distal limb infections such as synovial sepsis, osteomyelitis, and cellulitis. Existing guidance for intravenous regional limb perfusion has generally emphasized proximal access points like the saphenous vein for tarsal lesions, while also acknowledging that technique can materially affect local drug delivery and that the optimal method remains unsettled. This study adds practical evidence that a more distal, anterograde route may improve local vascular access in the hock. (dvm360.com)

What to watch: The next question is whether the imaging advantage seen with anterograde venography leads to better antimicrobial distribution, easier catheter placement, or improved outcomes in horses treated for tarsal infections. (vetmed.okstate.edu)