Page 338 - The Veterinary Care of the Horse
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Figure 7.11 Annular ligament syndrome
Diagnosis
Diagnosis is made on the following.
• The clinical signs.
• The results of diagnostic analgesia. The horse may improve with analgesia of the digital
sheath or with a low four- or six-point nerve block.
• Ultrasonography. The palmar annular ligament cannot normally be seen on an ultrasound
examination as it is only 1–2 mm ( in) thick. However, subcutaneous thickening, a
thickened ligament and digital sheath effusions are all readily visible.
