In the present study, veterinarians A and C had significantly higher scores of maxillary nerve staining than veterinarian B.
One alternative technique described in dog cadavers is to withdraw the stylet a few millimeters after introducing into the IO foramen and then advance the stylet and catheter together toward the maxillary nerve (VISCASILLAS et al., 2013).
Based on the concept that at least 6mm of nerve length should be exposed to local anesthetic to attain anesthetic blockade, an ideal score was assigned when staining of [greater than or equal to]6mm of the maxillary nerve was achieved.
The anesthetist should be aware of the close proximity between the maxillary nerve and the eye globe in cats and has to be careful to avoid damage to the ocular globe when performing a maxillary nerve block by either approach.
Results of this study do not support the IO approach to perform a maxillary nerve block in cats.
A cadaver study comparing two approaches to perform a maxillary nerve block in the horse.
A cadaver study comparing two approaches for performing Maxillary Nerve Block in Dogs.
Caption: Figure 1--Illustration of the subzigomatic approach (SBZ) for injection of methylene blue dye over the maxillary nerve in the head of a cat cadaver.