title: Ultrasound and anatomical correlation of the radial nerve at the arcade of Frohse.
abstract: BACKGROUND
  In this anatomical study we evaluated the feasibility of ultrasound (US) guided perineural injection of the deep branch of the radial nerve (DBRN) at the arcade of Frohse as potential therapy for nerve entrapment at this site.
  
  
  METHODS
  We examined 21 arms from 11 nonembalmed cadavers with US. Under US guidance, we injected ink into the DBRN perineural sheath beneath the arcade of Frohse. In subsequent anatomical dissection we evaluated the distribution of the ink.
  
  
  RESULTS
  It was possible to apply ink at the DBRN in 95%. In 80% the ink remained within the supinator and did not reach the DBRN segment proximal to the arcade.
  
  
  CONCLUSIONS
  With US guidance, it is possible to apply injection fluid safely around the DBRN inside the supinator tunnel. Due to the limited extent of the fluid, a second injection proximal to the arcade should be considered in the clinical setting.
authors.affiliation: Department of Radiology, KFJ Hospital, Vienna, Austria.|Center for Anatomy and Cell Biology, Medical University Vienna, Vienna, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Meng
authors.affiliation: Center for Anatomy and Cell Biology, Medical University Vienna, Vienna, Austria.
authors.forename: Ines
authors.initials: I
authors.lastname: Tinhofer
authors.affiliation: Center for Anatomy and Cell Biology, Medical University Vienna, Vienna, Austria.
authors.forename: Wolfgang J
authors.initials: WJ
authors.lastname: Weninger
authors.affiliation: Department of Neurology, KFJ Hospital, Vienna, Austria.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Grisold
mesh_terms: D000368:Aged; D001132:Arm / Q000294:innervation; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000294:innervation*; D011826:Radial Nerve / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D014463:Ultrasonography
keywords: arcade of Frohse; deep branch of the radial nerve; perineural injection; radial nerve; radial tunnel syndrome; ultrasound