title: [Nerve electrogram study on different degrees injuries of recurrent laryngeal nerve].
abstract: OBJECTIVE
  To study the display of different degrees injuries of recurrent laryngeal nerve in electroneurogram.
  
  
  METHODS
  We imitated several common types of injuries i.e. stretch, claming, electrocautery and cut in cervial segment of recurrent laryngeal nerve and measured latency and amplitude of the nerve by electroneurography.
  
  
  RESULTS
  The normal value of latency was (1.58 +/- 0.14) ms and that of amplitude was (2.53 +/- 0.78) mV; stretch group was (2.43 +/- 0.32) ms and (0.95 +/- 0.23) mV; claming group was (2.99 +/- 0.55) ms and (0.62 +/- 0.22) mV; electrocautery group was (4.85 +/- 1.03) ms and (0.24 +/- 0.15) mV; cut group was infinity ms and 0 mV.
  
  
  CONCLUSIONS
  Latency correlated directly with the degree of nerve injury. Whereas amplitude correlated inversely with the degree of nerve injury. Stretch injured recurrent laryngeal nerve the least, followed by claming, electrocautery and cut. This method could be used for nerve monitoring during operation and prognostic judgement.
authors.affiliation: Shanghai Wusong Centre Hospital, Shanghai 200940.
authors.forename: S
authors.initials: S
authors.lastname: Gong
authors.forename: J
authors.initials: J
authors.lastname: Wang
mesh_terms: D000818:Animals; D004594:Electrophysiology; D005071:Evoked Potentials; D005260:Female; D008297:Male; D011817:Rabbits; D012009:Recurrent Laryngeal Nerve / Q000503:physiopathology*; D061226:Recurrent Laryngeal Nerve Injuries