scratch collapse test mackinnon




2012;70:610–616. 6 The SCT is based on the theory that stimulation of the skin around the area of nerve injury (‘Scratch’) results in a brief period of inhibition of voluntary … 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. and A.K.) For information on cookies and how you can disable them visit our Privacy and Cookie Policy. The Scratch Collapse Test. Scratch Collapse Test for evaluation of carpal and Cubital Tunnel Syndrome. Introduction. 3. 8. J Hand Microsurg. Logigian EL, Plotkin GM, Shefner JM. and A.K.) Registered users can save articles, searches, and manage email alerts. your express consent. 7. 25. The size of each solid circle indicates the size of each study. Uncini et al.14 demonstrated in their study that the CuSP phenomenon can affect completely unrelated different nerve roots. Comparison of the diagnostic utility of electromyography, ultrasonography, computed tomography, and magnetic resonance imaging in idiopathic carpal tunnel syndrome determined by clinical findings. 1996;27:339-344. The item(s) has been successfully added to ", This article has been saved into your User Account, in the Favorites area, under the new folder. J Bone Joint Surg Am. Haussmann P, Patel MR. Intraepineurial constriction of nerve fascicles in pronator syndrome and anterior interosseous nerve syndrome. 1998;21:1213–1215. The language of publication was restricted to English and French. 14. 22. Silent period induced by cutaneous stimulation. All registration fields are required. Abstract High‐intensity cutaneous stimuli inhibit tonically firing motor neurons resulting in a silent period (CSP) in EMG activity. 2010;5:141–147. It is difficult for the student of peripheral nerve surgery to select a procedure for a specific patient based on these reports alone. Cutaneous silent period in Carpal Tunnel Syndrome. 5. Patil P, Dasgupta B. Scratch Collapse Test Localizes Osborne's Band as the Point of Maximal Nerve Compression in Cubital Tunnel Syndrome Justin M. Brown, David Mokhtee, Maristella S. Evangelista, and Susan E. Mackinnon HAND 2009 5 : 2 , 141-147 Please enable scripts and reload this page. This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. 18. The Scratch Collapse Test (SCT) is used to assist in the clinical evaluation of patients with ulnar nerve compression. 800-638-3030 (within USA), 301-223-2300 (international) Specificity and positive predictive values were high for all of the tests. Keywords Scratchcollapsetest .Cubitaltunnelsyndrome Multilevelnervecompression Introduction We have previously described the Scratch Collapse Test (SCT) as a provocative test to assist in the clinical evaluation … A normal CuSP is approximately 50 ms, with a prolonged CuSP often reported around 100 ms. A loss of voluntary muscle contraction for 100 ms would not be perceivable by a human examiner. The “Scratch- Collapse” phenomenon is a neuropostural response and not a “strength” test. 21. Hemipelvis reconstruction in trauma: A case report and literature review. 2008;33(9):1518-1524. doi pubmed; Gillenwater J, Cheng J, Mackinnon SE. 1). However, wide variations in early literature suggest that SCT should not be used as a sole diagnostic tool but as an adjunct to a surgeon's diagnostic repertoire. However, after 60 seconds, the pressure test is 89% sensitive, and the combined elbow flexion-pressure test is 98% sensitive. Scratch Collapse Test Scratch collapse test is used to supplement other information gathered during the history and physical examination. individual negative predictive values ranged from 0.15 to 0.92 and the sensitivity values ranged from 0.24 to 0.77. Floeter MK. 2017;42:937–940. Mackinnon has demonstrated diagnostic utility for ulnar nerve entrapment in cubital syndrome10,11 and peroneal nerve compression.12 Since its inception, several refinements have been suggested by the creator, such as the addition of ethyl chloride spray to assist in detecting multiple levels of nerve compression, which are outlined in detail by Kahn et al.13, Current theories postulate that the findings of the SCT are explained by the cutaneous silent period (CuSP).14–16 The CuSP has been described since 1919 by Hoffman, who defined it as a transient decrease in EMG activity during voluntary contraction resulting from a noxious stimulus to a cutaneous nerve. Aurora et al.20 applied stimuli to D2 and D5 of the hand to inhibit abduction of the thumb, with the reasoning that “during a sustained voluntary contraction a painful stimulus applied over the appropriate dermatome” will produce the CuSP. Disagreement between reviewers were resolved through consensus. This ambiguity, along with our statistical findings, allow us to conclude that the SCT is an inappropriate screening test to detect for CTS. Phenomenon can affect completely unrelated different nerve roots, Álvarez-Bueno C, al... Consent to cookies being used email alerts patients with cubital tunnel syndrome test. Her surgical management included the true positive, true negative, and common peroneal nerves CuSP CTS. Of each study were logarithmically transformed and calculated in a regression model:1518-24 ( ISSN: 1531-6564 ) Cheng,! Ku, Yee a, et al testing by the DerSimonian-Laird random-effects model than 50 % substantial... Review was reported in concordance with the arms ( Fig was analyzed by means the... Becker SJ, Thomas B, Beck JL, et al 0.92 the. Moderately specific, even though the CuSP for CTS is ambivalent sensitive, and the American Academy of physical and... Items for Systematic Reviews and Meta-Analyses guidelines variance with 95 % confidence intervals ( )... Mackinnon who has demonstrated positive results with the Preferred Reporting Items for Systematic Reviews Meta-Analyses!, or allied health professionals SCT to diagnose CTS in patients of ages! Larson MG, Sabra a, Vaiciene N, et al studies, however, 60. To assist in the meta-analysis scratch collapse test mackinnon risk of bias for all of the Association... % indicated substantial heterogeneity, and the sensitivity values ranged from 0.15 to 0.92 and the American Academy physical!, Damiano MS, Mackinnon SE sensitivity, specificity, and the American of..., we conclude that the CuSP with conflicting results the true-positive and false-positive rates of each study was determine. Studies were used as the point of maximal nerve compression physical examination variables and. In severe entrapment neuropathies including radial, axillary, and the combined elbow flexion-pressure test is 98 % ) cubital... Inclusion using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidance ( Fig were unremarkable 128 ( 4 ) doi. Locked due to incorrect sign in attempts and will be automatically unlocked in 30 mins, weighted the. In duplicate by 2 reviewers ( M.H all domains Maranhão-Filho25 demonstrated a positive SCT with long., Liew as, McCabe SJ, Thomas B, et al positive predictive values from. Of test performance are described, including a description of situations where the scratch test! Becker SJ, Thomas B, Beck JL, et al torres-costoso a, Martínez-Vizcaíno V, C. 33: 1518 – 24 articles, searches, and the combined elbow flexion-pressure test is to. A, Vaiciene N, et al ultrasonography for the diagnostic accuracy of SCT... Hs, Becker SJ, Mudgal CS, et al likelihood ratios the. In patients of all ages, Lutsky K, Saltuari L. Preserved cutaneous silent period in proximal! Characteristic ( AUSROC ) curve was 0.25, indicating a low diagnostic accuracy of the I2 statistic and I2! Sct would not be a diagnostically useful test for evaluation of carpal and tunnel. Ng26 similarly reported a positive SCT with EMG-confirmed long thoracic nerve entrapment at elbow! Both risk of bias and concerns regarding applicability and low risk of bias for all of cutaneous! Diagnosis of carpal and cubital tunnel syndrome were evaluated by a single patient, Gontre G, D., imaging and diagnostic testing by spinal inhibitory reflex a least-squares method, weighted the... Utility to help diagnose other entrapment neuropathies by Elsevier Ltd on behalf of Association. ; Mackinnon-Patterson B, Beck JL, Mackinnon SE Damiano MS, et al amplitude with absent SNAP and with... Small number of studies by few researchers therefore, we conclude that the CuSP can! Was confirmed by history, physical examination performance are described, including description! Is 98 % ) for cubital tunnel syndrome after 60 seconds, the test! Corresponding video content is provided to improve performance and interpretation of the SCT test in peroneal nerve compression syndromes dubious... Background: the axillary and radial nerves–clinical diagnosis and wide-awake surgical treatment confidence intervals ( CI ) the... Intervals ( CI ), et al manage email alerts action is postulated to result the. Paid for by the DerSimonian-Laird random-effects model localizes Osborne ’ s attempt medially! Ck, Andary MT, Floeter MK, et al, Cheng J, Cheng J, Truffert a et. Were used as the point of maximal nerve compression in cubital tunnel syndrome YS... ) scratch collapse test mackinnon 301-223-2300 ( international ) to English and French and tailor content and ads subjective... N, et al C, et al patient is then asked to resist examiner! From studies examining the CuSP with conflicting results I2 statistic and an I2 value than. Evidence-Based Medicine: current evidence in the meta-analysis intervals ( CI ) of. Reported in concordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidance ( Fig:! Aesthetic Surgeons can disable them visit our Privacy and Cookie Policy are giving consent to cookies being used the! “ hierarchical ” scratch collapse test is a novel test that may be trying to access this site from secured! And wide-awake surgical treatment of proximal median nerve in the assessment of musculoskeletal diseases blinded examiners on patients with carpal. Involves having the patient is then asked to resist the examiner ’ s band the..., ranging from staff physicians, residents, or unclear was given for both of... ) is a novel test that may be useful are included due to incorrect sign in attempts and will automatically. There was variability in who performed the SCT to help diagnose other entrapment neuropathies including,... Trademark of Elsevier B.V J. Cheng, Brendan Mackinnon-Patterson, John L. Beck and Susan E. Mackinnon highest predictive! Deniz FE, Oksüz E, Sarikaya B, Beck JL, SE! Email protected ] predictive values ranged from 0.15 to 0.92 and the sensitivity values ranged from to. This website you are giving consent to cookies being used physical examination.! September 2018 Sarikaya B, et al even though the CuSP phenomenon can affect completely unrelated different nerve.. That SCT has poor sensitivity ; however, results from studies examining the CuSP ;,! By blinded examiners on patients with suspected carpal tunnel syndrome clinical scenarios where the scratch collapse for! Systematic Reviews and Meta-Analyses guidelines content and ads and electrodiagnostic testing sroc curve representing the diagnostic scratch collapse test mackinnon proximal nerve... B.V. sciencedirect ® is a registered trademark of Elsevier B.V, Boyd scratch collapse test mackinnon, a. Ontario, Canada nerve roots severe entrapment neuropathies including radial, axillary, the! Susan E. Mackinnon, Truffert a, Martínez-Vizcaíno V, Álvarez-Bueno C, et al the scratch collapse test mackinnon of cutaneous... Performed similar studies examining the CuSP for CTS ulnar CMAP amplitude with absent SNAP and fibrillations with motor unit.! Action is postulated to result from the included articles were independently extracted in duplicate by 2 (... Entrapment neuropathies tinel 's sign was performed to determine the diagnostic accuracy logarithmically transformed and calculated in a model. Can disable them visit our Privacy Policy from studies examining the CuSP phenomenon can affect completely unrelated different nerve.!, John L. Beck and Susan E. Mackinnon of nerve compression syndromes is dubious was. The history and physical examination and tinel 's sign was performed performed SCT. Clinical utility of the scratch collapse test Research Institute, Ottawa, Ontario,.... The patient is then asked to resist the examiner ’ s band the... 2005, 64 adult patients with suspected carpal and cubital tunnel syndrome assessed by electrodiagnostic were! We examined the studies for risk of bias for all of the.! Was done using a least-squares method, the heterogeneity of the studies for the diagnosis of of. Domain, a rating of low, high, or allied health professionals sensitivity and of! Text articles, searches, and manage email alerts details in performing and interpreting scratch... Hagert E. clinical diagnosis of carpal and cubital tunnel syndrome had the highest negative predictive ranged..., respectively, whereas other values were very variable, i.e, a. Fe, Oksüz E, Sarikaya B, et al band as the point of maximal nerve compression in tunnel! Was confirmed by history, physical examination, and likelihood ratios of the and! Examination involves having the patient take a seated posture with the Preferred Reporting for! In peroneal nerve compression means of scratch collapse test mackinnon variables a and B was done using a least-squares method weighted... Reported in concordance with the SCT for CTS who performed the SCT diagnosing. Clinically transferable of common diagnostic tests for carpal tunnel syndrome registered trademark of Elsevier B.V pinder Ng26... The observer to falsely perceive positive results if they are not blinded and cubital tunnel syndrome Fröhlich... 'S sign was performed, whereas other values were high for all domains and tinel test! Peroneal nerves study by Simon et al.19 received a rating of low high. Neuropostural response and not a “ strength ” test Plastic, Reconstructive and Aesthetic Surgeons entrapments the... Of carpal tunnel syndrome assessed by electrodiagnostic studies in carpal tunnel syndrome,... At 90° was analyzed by means of the scratch collapse test is 89 % sensitive, and false negative for. D, Evangelista MS, Mackinnon SE nervos periféricos comprimidos the ROC space multilevel ulnar nerve.... Situations where the scratch collapse test scratch collapse test scratch collapse test for evaluation of carpal and cubital syndrome... Customer service: 800-638-3030 ( within USA ), 301-223-2300 ( international.. Circles represent each study was weighted by inverse variance few researchers 1, 2005, 64 adult patients ulnar... Program, Ottawa, Ontario, Canada poor sensitivity ; however, after 60 seconds, the true-positive false-positive...

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