Scratch Collapse Test Is a Useful Clinical Sign in Assessing Long Thoracic Nerve Entrapment

Pinder, Elizabeth; Ng, Chye Yew

doi:10.1055/s-0036-1585429

Cited by 11 publications

(8 citation statements)

References 13 publications

(17 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sollero and Maranhão-Filho 25 demonstrated a positive SCT in EMG-confirmed CTS when other clinical examinations were unremarkable. Pinder and Ng 26 similarly reported a positive SCT with EMG-confirmed long thoracic nerve compression. Both these studies, however, were case reports on a single patient.…”

Section: Discussionmentioning

confidence: 88%

Scratch Collapse Test for Carpal Tunnel Syndrome: A Systematic Review and Meta-analysis

Huynh¹,

Karir²,

Bennett³

2018

Plastic and Reconstructive Surgery - Global Open

View full text Add to dashboard Cite

Background:Despite the fact that carpal tunnel syndrome (CTS) is the most common entrapment neuropathy, the diagnostic accuracy of clinical screening examinations for CTS is controversial. The scratch collapse test (SCT) is a novel test that may be of diagnostic advantage. The purpose of our study was to determine the diagnostic accuracy of the SCT for CTS.Methods:A literature search was performed using PubMed (1966 to April 2018); Ovid MEDLINE (1966 to April 2018); EMBASE (1988 to April 2018); and Cochrane Central Register of Controlled Trials (The Cochrane Library, to April 2018). We examined the studies for the pooled sensitivity, specificity, and likelihood ratios of the SCT. This review has been registered with PROSPERO (CRD42018077115).Results:The literature search generated 13 unique articles. Seven articles were included for full text screening and 3 articles met our inclusion criteria, all of which were level II evidence with low risk of bias (165 patients). Pooled sensitivities, specificities, positive likelihood ratio, and negative likelihood ratios were 0.32 [95% CI (0.24–0.41)], 0.62 [95% CI (0.45–0.78)], 0.75 [95% CI (0.33–1.67)], and 1.03 [95% CI (0.61–1.74)], respectively. The calculated area under the summary receiver operating characteristic (AUSROC) curve was 0.25, indicating a low diagnostic accuracy.Conclusion:The SCT has poor sensitivity; however, it is moderately specific. Based on the current literature and their variable quality of the evidence, we conclude that the SCT is not an adequate screening test for detecting CTS.

show abstract

Section: Discussionmentioning

confidence: 88%

Scratch Collapse Test for Carpal Tunnel Syndrome: A Systematic Review and Meta-analysis

Huynh¹,

Karir²,

Bennett³

2018

Plastic and Reconstructive Surgery - Global Open

View full text Add to dashboard Cite

show abstract

“…We recognize the current scrutiny of this examination, but we must also acknowledge the numerous successful demonstrations of the scratch collapse test for cubital tunnel syndrome; for multilevel ulnar nerve compression detection; for peroneal nerve compression; and for long thoracic nerve, proximal median nerve, axillary nerve, and radial nerve entrapments. 4,8–10,27,28 Our findings showed no statistically significant difference between upper and lower extremities, thus deeming the lower extremities a valid testing site for the scratch collapse test. Our sensitivities also mirror the original results and more closely match those of studies involving unblinded examiners.…”

Section: Discussionmentioning

confidence: 54%

“…3–5,7 This idea is supported by the positive results reported by the original senior author for peroneal nerve compression, and the wide range of sensitivities when performed by novice examiners. 4,5,10,17,26…”

Section: Discussionmentioning

confidence: 99%

“…The scratch collapse test has been used successfully in the median, ulnar, peroneal, and long thoracic nerves. [3][4][5][6][7][8][9][10] The scratch collapse test is believed to be a gross physical manifestation of the cutaneous silent period. The cutaneous silent period is a period of tonic voluntary muscle inhibition caused by a painful cutaneous stimulus mediated by A-delta fibers and substance P. 3,[11][12][13] Rat studies have demonstrated that inflammatory states increase the amount of substance P released and the number of substance P receptors in tissues.…”

mentioning

confidence: 99%

“…The scratch collapse test has been used successfully in the median, ulnar, peroneal, and long thoracic nerves. 3–10…”

mentioning

confidence: 99%

See 2 more Smart Citations

Validity of Using the Scratch Collapse Test in the Lower Extremities

Carter

Gonzalez

2022

Plastic &Amp; Reconstructive Surgery

View full text Add to dashboard Cite

Background:The scratch collapse test is a provocative test that has been successfully used for peripheral neuropathies. The elbow is the main testing site, but there may be times when use of the upper extremities is contraindicated. This study sought to determine the sensitivity of using the scratch collapse test on the lower extremity for upper extremity neuropathies. Methods: One hundred patients with an electromyographically confirmed diagnosis of carpal tunnel or cubital tunnel syndrome were prospectively enrolled. As a control, the scratch collapse test was conducted normally using the elbow as a testing site. After a baseline was established, the test was repeated using eversion of the foot and ankle against an inversion force.Results: Of the 100 study patients, 89 had a positive scratch collapse test on the upper extremity and 84 had a positive test on the lower extremity. In the 51 patients with carpal tunnel syndrome, 45 had a positive test on the upper extremity (sensitivity, 88.2 percent; 95 percent CI, 76.13 to 95.56 percent), and 42 had a positive test of the lower extremity (sensitivity, 82.35 percent; 95 percent CI, 69.13 to 91.60 percent). In the 49 patients with cubital tunnel syndrome, 44 had a positive test on the upper extremity (sensitivity, 89.8 percent; 95 percent CI, 77.77 to 96.6 percent), and 42 had a positive test on the lower extremity (sensitivity, 85.7 percent; 95 percent CI, 72.76 to 94.06 percent). Conclusion: There were no statistically significant differences in the sensitivities of the scratch collapse test on the upper or lower extremities, suggesting that the lower extremity could serve as an alternative site for the scratch collapse test.

show abstract

Median Nerve Entrapment

Andrea

Celli

2022

Atlas of Elbow Surgery

View full text Add to dashboard Cite

Scratch Collapse Test Is a Useful Clinical Sign in Assessing Long Thoracic Nerve Entrapment

Cited by 11 publications

References 13 publications

Scratch Collapse Test for Carpal Tunnel Syndrome: A Systematic Review and Meta-analysis

Scratch Collapse Test for Carpal Tunnel Syndrome: A Systematic Review and Meta-analysis

Validity of Using the Scratch Collapse Test in the Lower Extremities

Median Nerve Entrapment

Contact Info

Product

Resources

About