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Accuracy of high‐resolution ultrasonography in establishing the diagnosis of carpal tunnel syndrome
Author(s) -
Aggarwal Purnima,
Jirankali Vivek,
Garg Sudhir K.
Publication year - 2020
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/ans.15704
Subject(s) - medicine , carpal tunnel syndrome , ultrasonography , median nerve , diagnostic accuracy , radiology , physical examination , surgery
Background The aim of this study was to evaluate the accuracy of high‐resolution ultrasonography in the diagnosis of carpal tunnel syndrome (CTS). Methods It included 50 patients with signs and symptoms suggestive of CTS and 50 individuals as control group. Cross‐sectional area of median nerve at the inlet of carpal tunnel was measured in control as well as symptomatic group by ultrasonography. In addition, nerve conduction studies (NCS) were carried out in the symptomatic group. Radiologists performing the ultrasonography were blinded to the results of NCS. Sensitivity, specificity and accuracy of ultrasonography and NCS in the diagnosis of CTS were calculated and compared. Results In control group, cross‐sectional area of the median nerve ranged between 5 and 7.3 mm 2 , whereas in the symptomatic group it varied from 8.4 to 16.5 mm 2 . It was >9 mm 2 in 47 patients. With a cut‐off of 9 mm 2 , sensitivity, specificity and accuracy of ultrasonography in diagnosing CTS were 95%, 100% and 97%, respectively. NCS was diagnostic of CTS in 48 (96%) patients. Conclusion Ultrasonographic examination gives similar results to NCS in establishing diagnosis of CTS and can be used as a screening modality with further use of NCS in cases where ultrasonography is non‐diagnostic.