UG techniques for injection of the SI region allow placement of the needle under the iliac wing and administration of liquid extremely close to the SI joint. The use Of one or an appropriate combination of UG approaches is useful to address more specifically the different SI diseases in horses. Several techniques have been described for local infiltration of sacroiliac (SI) area. However, these techniques are all based on external landmarks which can vary according to horse shape, pelvis pathology and chronic hindlimb lameness. It is also possible to inadvertently place the needle over the iliac wing because of SI joint depth. For all these reasons, ultrasonography had been advocated to perform SI injections. An ultrasound-guided (UG) injection technique of the SI region (four approaches) was developed on cadavers.
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