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Epineural neurorrhaphy is a surgical procedure involving the anastomosis of a severed nerve endings completed by placing fine sutures in the epineural connective tissue of the nerve. In veterinary medicine, epineural neurorrhaphy is performed infrequently due to the small diameter of nerves in the distal limbs of canines. A canine may require epineural neurorrhaphy to be performed if the dog has damaged a large diameter nerve such as in the tarsal or carpal area.
Epineural neurorrhaphy is divided into two repair groups: primary and delayed repair. Both primary and delayed procedures repair a nerve laceration by bringing the nerve endings together, but delayed epineural neurorrhaphy is completed when the surrounding tissues require healing time. Crushed or contaminated nerve tissues will be required to heal prior to nerve repair, therefore, adequate healing must take place to ensure a positive result. Epineural neurorrhaphy is a very delicate and complex surgical procedure, conducted by a veterinary surgeon with at least six years of experience in peripheral nerve repair.
An epineural neurorrhaphy procedure begins will an overall health assessment of the canine patient to ensure the dog is well enough to undergo surgery. On the day of the surgery, the canine will be anesthetized with controlled injectable drugs such as ketamine and xylazine. The area in which the veterinary surgeon has located the damaged nerve will be prepped and draped in preparation for aseptic surgical technique.
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The effectiveness of epineural neurorrhaphy in dogs is guarded. In cases of sharp nerve lacerations with no evidence of crushing, avulsion or open chronic wounds, healing is generally good.
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Following an epineural neurorrhaphy procedure, the dog will be required to wear a padded bandage that provides moderate immobilization for approximately one to two weeks. In the case of neurorrhaphy tension, it may be necessary to place the affected limb in a rigidly immobilizing cast for 3 weeks. During this period of healing, all exercise should be strictly limited. Once all bandages are removed, normal activity may return and physical therapy will be necessary two to three weeks after.
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The cost of epineural neurorrhaphy surgery depends on how badly damaged the nerve and surround tissues are. The average cost of nerve repair surgery is between $2,000 and $3,000 to have completed.
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Epineural neurorrhaphy in dogs is a complex surgery that is not commonly completed in veterinary medicine. Dogs with severe damage to the nerves are at risk for a severe infection before and after surgery. All risks associated with this form of surgery are dependent on the dog’s specific condition and should be discussed with the veterinary surgeon.
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Dogs who require epineural neurorrhaphy surgery are usually victim to unexpected trauma that is not easily prevented. Hit-by-car incidences, natural disasters, fires and attacks are the most common causes of nerve laceration in canines.
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