Nerve Blocks (diagnostic analgesia) are used in lameness and poor performance investigations of the horse.
To perform a Nerve Block the vet injects local anaesthetic into the nerves that are around a particular area of the limb eg fetlock. When the anaesthetic has taken effect, the horse is re examined to see if the lameness has improved or not. If necessary this process can be done several times, working from the foot of the affected limb upwards to determine the point of lameness.
The anaesthetic can also be injected into the horse’s joints and/or the tendon sheaths to see if these are the source of pain. By working in a logical way and using the additional tools of radiography (x-ray) and ultrasonography an exact cause of the lameness can be found.