The "hierarchical" Scratch Collapse Test for identifying multilevel ulnar nerve compression

Hand : Official Journal of the American Association for Hand Surgery
Kristen M DavidgeSusan E Mackinnon

Abstract

The Scratch Collapse Test (SCT) is used to assist in the clinical evaluation of patients with ulnar nerve compression. The purpose of this study is to introduce the hierarchical SCT as a physical examination tool for identifying multilevel nerve compression in patients with cubital tunnel syndrome. A prospective cohort study (2010-2011) was conducted of patients referred with primary cubital tunnel syndrome. Five ulnar nerve compression sites were evaluated with the SCT. Each site generating a positive SCT was sequentially "frozen out" with a topical anesthetic to allow determination of both primary and secondary ulnar nerve entrapment points. The order or "hierarchy" of compression sites was recorded. Twenty-five patients (mean age 49.6 ± 12.3 years; 64 % female) were eligible for inclusion. The primary entrapment point was identified as Osborne's band in 80 % and the cubital tunnel retinaculum in 20 % of patients. Secondary entrapment points were also identified in the following order in all patients: (1) volar antebrachial fascia, (2) Guyon's canal, and (3) arcade of Struthers. The SCT is useful in localizing the site of primary compression of the ulnar nerve in patients with cubital tunnel syndrome. It is also sensitive eno...Continue Reading

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Citations

Apr 16, 2016·Current Reviews in Musculoskeletal Medicine·Christopher J Dy, Susan E Mackinnon
Oct 19, 2016·The Journal of Hand Surgery·Brian H CohenPatrick M Kane
Jan 27, 2017·Plastic and Reconstructive Surgery·Leahthan F DomeshekSusan E Mackinnon
Oct 5, 2017·Hand : Official Journal of the American Association for Hand Surgery·Shelley S NolandSusan E Mackinnon
Nov 29, 2017·Hand : Official Journal of the American Association for Hand Surgery·Kristen M DavidgeSusan E Mackinnon
Sep 22, 2019·Hand : Official Journal of the American Association for Hand Surgery·Madi El-HajJ Megan M Patterson
Oct 17, 2017·Plastic and Reconstructive Surgery·Lorna C KahnSusan E Mackinnon
Apr 18, 2019·The Journal of Bone and Joint Surgery. American Volume·Hollie A PowerSusan E Mackinnon
Jul 24, 2020·Hand : Official Journal of the American Association for Hand Surgery·Daniel G AresonRebecca Traub
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Oct 24, 2018·Plastic and Reconstructive Surgery. Global Open·Minh N Q HuynhAlexandria Bennett
Jun 23, 2021·PM & R : the Journal of Injury, Function, and Rehabilitation·Masashi KawabataKentaro Kamiya

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