title: [Phrenic radix conduction time in inflammatory demyelinating polyneuropathy patients].
abstract: OBJECTIVE
  To investigate the features and application of phrenic radix conduction time (PRCT) in inflammatory demyelinating polyneuropathy (IDP) patients.
  
  
  METHODS
  Distal motor latency (DML) was recorded by stimulating phrenic nerve electrically and phrenic nerve root magnetically in 20 IDP patients with surface electrodes at intercostal space. The difference of the two DML was calculated and compared with those recorded previously from 61 sides in 31 healthy control subjects.
  
  
  RESULTS
  PRCT of the IDP patients was longer than that of the controls, and it correlated with the severity of clinical dyspnea. The abnormal rate of PRCT was higher than the incidence of clinical dyspnea.
  
  
  CONCLUSIONS
  PRCT could reflect the functional status of the spinal roots related to respiration in IDP patients at an electrophysiological level. It correlates well with the degree of clinical dyspnea. Its detection is helpful to find out the subclinical dyspnea in IDP patients.
authors.affiliation: Department of Neurology, Beijing Hospital, The Fifth School of Clinical Medicine, Peking University Health Science Center, Beijing 100730.
authors.forename: Li
authors.initials: L
authors.lastname: Zhuang
authors.forename: Xiao-fu
authors.initials: XF
authors.lastname: Tang
authors.forename: Dong-sheng
authors.initials: DS
authors.lastname: Fan
authors.forename: Xian-hao
authors.initials: XH
authors.lastname: Xu
authors.forename: Ben-hong
authors.initials: BH
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Du
authors.forename: Jing-wen
authors.initials: JW
authors.lastname: Jiang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009431:Neural Conduction; D010791:Phrenic Nerve / Q000503:physiopathology*; D020277:Polyradiculoneuropathy, Chronic Inflammatory Demyelinating / Q000503:physiopathology*; D012120:Respiration Disorders / Q000209:etiology