What is the primary diagnostic test for suspected laminitis in a horse?

The primary diagnostic test for suspected laminitis in a horse is the use of hoof testers and radiographs. Hoof testers are a crucial tool for detecting pain and sensitivity in specific areas of the hoof, which is indicative of laminitis. By applying pressure to various areas of the hoof, the veterinarian can determine if inflammation or sensitivity exists, pinpointing the potential discomfort typical of laminitic conditions.

Radiographs play a complementary role by providing important visual information about the bones within the hoof, including the relationship between the coffin bone and the hoof wall. In advanced cases of laminitis, radiographs can reveal rotation or sinking of the coffin bone, which is a critical factor in confirming the diagnosis and assessing the severity of the condition.

While a physical examination is important, it is not sufficient as a standalone method for diagnosis. A detailed assessment may reveal symptoms such as increased digital pulse or heat in the hooves, but definitive diagnosis requires the objective data provided by hoof testers and radiographs. Blood tests can assess systemic health but are not specific for laminitis, and ultrasound may be used in some contexts but does not provide the direct information needed for laminitis diagnosis as effectively as hoof testers and radiographs do.