Posterior interosseous nerve of the elbow at the arcade of Frohse: Ultrasound appearance in asymptomatic subjects.
Diagn Interv Imaging
; 100(9): 521-525, 2019 Sep.
Article
in En
| MEDLINE
| ID: mdl-30935861
ABSTRACT
PURPOSE:
To assess the normal values of the antero-posterior (AP) diameter of the posterior interosseous nerve (PIN) of the elbow as it passes beneath the arcade of Frohse and to search for PIN-diameter differences between the upstream, entry point and downstream of the arcade. MATERIAL ANDMETHODS:
Thirty asymptomatic patients prospectively underwent bilateral B-mode ultrasound of the PIN of the elbow. There were 15 men and 15 women with a mean age of 30.2±5.31 (SD) years (range 26-43 years). Of these, 23 patients were right-handers (23/30; 77%) and 7 were left handers (7/30; 23%). AP diameter of the PIN was measured in long axis at three different locations including the entry point of the arcade, 5-mm upstream and 5-mm downstream the arcade. A comparison between the three measurements was performed using paired t-test.RESULTS:
The mean AP diameters of the PIN were 0.83±0.21 (SD) mm (range 0.43-1.31mm), 0.6±0.17 (SD) mm (range 0.29-1.16mm) and 0.49±0.13 (SD) mm (range 0.26-0.86mm) at 5-mm upstream, entry point of the arcade and 5-mm downstream the arcade of Frohse, respectively. Significant drops in PIN diameter were found between upstream and the arcade (-0.23mm; 27%; P<0.001), between the arcade and downstream (-0.11mm; 17%; P<0.001), and between upstream and downstream the arcade (-0.34mm; 40%; P<0.001).CONCLUSION:
Disparity in AP diameter of the PIN of the elbow in the arcade of Frohse is a normal finding and should not be erroneously interpreted as entrapment when present alone.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radial Nerve
/
Ultrasonography
/
Elbow
Type of study:
Diagnostic_studies
/
Observational_studies
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Diagn Interv Imaging
Year:
2019
Document type:
Article
Affiliation country: