J Wrist Surg 2016; 05(04): 315-319
DOI: 10.1055/s-0036-1584899
Wrist and Carpal Anatomy
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

The Course of the Terminal Posterior Interosseous Nerve and Its Relationship with Wrist Arthroscopy Portals

Yongwei Pan
1   Department of Orthopaedics, Beijing Tsinghua Changgung Hospital, Medical Center, Tsinghua University, Beijing, China
,
Leung-kim Hung
2   Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Shatin, Hong Kong
› Institutsangaben
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Publikationsverlauf

17. Mai 2016

18. Mai 2016

Publikationsdatum:
01. Juli 2016 (online)

Abstract

Purpose The terminal branches of the posterior interosseous nerve (PIN) are the main articular branch on the dorsal aspect of the wrist. Its relationship to dorsal wrist arthroscopic portals has not yet been elucidated. The purpose of this study was to quantitatively describe the anatomical relationships between the dorsal wrist arthroscopic portals and the PIN.

Methods Dorsal wrist arthroscopic portals were established in 28 cadaver extremities, after which the limbs were dissected. Measurements were taken from the portals to the PIN.

Results The PIN passed ulnar to the 3/4 portal with a mean distance of 4.8 mm (range: 1.2–12.0, standard deviation [SD] = 2.6). The PIN passed radial to the 4/5 portal with a mean interval of 9.0 mm (range: 3.8–12.7, SD = 2.3). The main trunk of PIN or its closest terminal branch was a mean of 7.2 mm (range: 0.0–13.2 mm, SD = 3.1) radial to the midcarpal radial (MCR) portal. In 2 of the 28 specimens, one terminal branch of PIN lay directly over this portal. The distance between the midcarpal ulnar (MCU) portal and the PIN or its closest terminal branch was only a mean of 1.6 mm (range: 0–6.4 mm, SD = 2.0). In 15 of the 28 specimens, the PIN lay directly over the MCU portal, or the portal was located between the terminal branches of PIN.

Conclusion The MCU portal was the most precarious, due to the close proximity of PIN and its terminal branches. The 3/4 and MCR portals were also at risk, while the 4/5 portal was relatively safe for the PIN.

Note

This work was performed at the Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR. No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article. No ethical committee approval is needed for this article.


 
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