User:Lennypillay/Sunderland System

Sunderland System
This is a classification of nerve injuries.

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First-degree: : (Neuropraxia) nerve in continuity, compression or ischemia - local conduction block, focal demyelinization may occur, recovery is usually complete in 2-3 weeks.

Second-degree: (Axonometmesis): injury to axon, supporting structures ( including endoneurium ) intact; wallerian degeneration occurs; recovery at 1mm/day as axon follow ‘tubule’,

Third-degree: endoneurium disrupted, epineurium & perineurium intact: recovery may range from poor to complete.; nerve may not appear seriously damaged on gross inspection.

Fourth-degree: (Neurotmesis) :interruption of all neural and supporting elements except the epineurium intact; the nerve is usually enlarged.

Fifth-degree: (Transection) complete transection with loss of continuity.

References: 1) Andrew Kaye. " Classification of Nerve Injuries "; in Essential Neurosurgery. Churchill Livingstone. 1991; pages 333-334. (2) Mark S. Greenberg, MD. " Injury Classification System "; in Handbook of Neurosurgery. Third edition. 1994; pages 411- 412.

Thanks to Medstudents webpage :http://www.medstudents.com.br/neuroc/neuroc4.htm