title: [Comparisons among different reference values of nerve conduction velocity in forensic appraisal].
abstract: OBJECTIVE
  To provide the evidences for the choice of normal reference value of nerve conduction velocity (NCV) in clinical forensic appraisal.
  
  
  METHODS
  One hundred and fourteen cases with normal peripheral nerve and 155 cases with injured peripheral nerve were collected. The NCV of homonymous nerves in two limbs were detected. In the normal cases, the NCV of the left limbs were used as the normal reference values. The NCV of the right limbs were compared with that of left limbs, the commendatory normal reference values from Beijing Xiehe Hospital and Shanghai Huashan Hospital. In the injured cases, the results of NCV in injuried limbs were compared with the results of healthy limbs and the reference values from Beijing Xiehe Hospital and Shanghai Huashan Hospital.
  
  
  RESULTS
  In the normal group, there was no statistical difference between the left and right limbs in NCV results of homonymous nerve (P > 0.05). The false positive rates (FPR) were 0, 11.4% and 5.2% for three choices normal reference respectively. The false negative rates (FNR) were 0, 9.7% and 12.3% for three choices normal reference in injuried group. Thee false negative cases were all slight nerve injury.
  
  
  CONCLUSIONS
  The reference value of self-control method could decrease the FPR of normal cases and FNR of injured cases. In clinical forensic appraisal of peripheral nerve, the nerve condition study results from healthy homonymous nerve should be regarded as the reference value at first, supplemented by reference values from clinical labs.
authors.affiliation: Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, P R China, Shanghai 200063, China. gaod@ssfjd.cn
authors.forename: Dong
authors.initials: D
authors.lastname: Gao
authors.forename: Dong
authors.initials: D
authors.lastname: Tian
authors.forename: Qing
authors.initials: Q
authors.lastname: Xia
authors.forename: Guang-You
authors.initials: GY
authors.lastname: Zhu
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Fan
mesh_terms: D000293:Adolescent; D000328:Adult; D004568:Electrodiagnosis / Q000379:methods; D005542:Forearm; D005554:Forensic Medicine; D006801:Humans; D008475:Median Nerve / Q000293:injuries / Q000502:physiology; D008875:Middle Aged; D009431:Neural Conduction / Q000502:physiology*; D059348:Peripheral Nerve Injuries / Q000175:diagnosis*; D010525:Peripheral Nerves / Q000502:physiology*; D012016:Reference Values; D014459:Ulnar Nerve / Q000293:injuries / Q000502:physiology; D055815:Young Adult