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This Concept Map, created with IHMC CmapTools, has information related to: Peterson NerveBlock, Peterson Nerve Block (MO) Disadvantages MORE CHALLENGING -required alot of skill and knowledge, Peterson Nerve Block (MO) How is it done Procedure, Peterson Nerve Block (MO) Species Variation Catlle Horses, Peterson Nerve Block (MO) Advantages -Considered safer than the retrobular block because there is less risk of penetration and hemorrhage - injection of the meninges surrounding the optic nerve is minimized during this technique - more effective - causes less edema and inflammation that with the infiltration of local anaesthetics into the eyelids and orbits of other blocks, Peterson Nerve Block (MO) Structures Blocked Nerve blocked include the opthalmic and maxillary branches of the trigeminal nerve. - if enough of the local anesthetic is deposited in the pterygopalatine fossa, then it may be possible to block the optic nerve BUT, this is dependent on the positioning of the needle and if enough is being deposited in the optic foramen., MORE CHALLENGING -required alot of skill and knowledge Complications Block Failure, Peterson Nerve Block (MO) General Use - Desensitizes the eye and the orbit for surgeries such as enucleations and foreign body removal, or even horn removal in adult bovine species.