title: Carpal Tunnel Syndrome Grading Using High-Resolution Ultrasonography.
abstract: OBJECTIVE
  Carpal tunnel syndrome (CTS) is a common entrapment neuropathy of the wrist. The diagnosis of CTS has been a concern for physicians for a long time. The aim of this study is to evaluate the use of the median nerve (MN) cross-sectional area (CSA) in the wrist compared with the CSA in the forearm to grade the severity of CTS in Egyptian patients.
  
  
  METHODS
  The CSAs of the MN in the wrist and forearm were measured in 72 wrists that were diagnosed with CTS via nerve conduction studies and 80 healthy wrists. The CTS group was subdivided into three subgroups (mild, moderate, and severe CTS). The ratio of the CSA of the MN in the wrist to that in the forearm was used to calculate cutoff values for CTS grading.
  
  
  RESULTS
  There were positive correlations between the CSAs of the MN in the wrist and MN conduction latency. At a wrist-forearm ratio of 1.7, the high-resolution ultrasonography showed 96.1% accuracy in the detection of CTS.
  
  
  CONCLUSIONS
  High-resolution ultrasonography can be used in CTS grading.
authors.affiliation: *Clinical Neurophysiology Unit, Cairo University, Giza, Egypt; and †Neurology Department, Cairo University, Giza, Egypt.
authors.forename: Hala R
authors.initials: HR
authors.lastname: El Habashy
authors.forename: Reem A
authors.initials: RA
authors.lastname: El Hadidy
authors.forename: Sandra M
authors.initials: SM
authors.lastname: Ahmed
authors.forename: Basma B
authors.initials: BB
authors.lastname: El Sayed
authors.forename: Aya S
authors.initials: AS
authors.lastname: Ahmed
mesh_terms: D000328:Adult; D002349:Carpal Tunnel Syndrome / Q000000981:diagnostic imaging*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000000981:diagnostic imaging*; D010865:Pilot Projects; D012720:Severity of Illness Index; D014463:Ultrasonography / Q000379:methods*